JP2835319B2 - optical disk - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium on which attribute information of reproduced data is recorded together with the reproduced data.
In particular, not only reproduction data having a specific attribute but also reproduction data having various attributes can be recorded, and
The present invention relates to a recording medium that can perform appropriate reproduction according to the attribute data.

[0002]

2. Description of the Related Art A compact disk, a so-called CD, has been already developed as a generally known optical disk. Such an optical disk records and reproduces movie data over a long period of time in terms of its storage capacity. It has been difficult. From this point of view, optical discs that can record movie data at high density have been studied,
Is being developed.

[0003]

With the emergence of such optical disks capable of high-density recording, it is possible to record a plurality of selectable video data or audio data on such optical disks. And also
By recording multiple audio streams, you can associate different audio with one video,
By recording a plurality of sub-video streams, for example, subtitles with different language types can be selected and displayed.

[0004] As the number of selections increases, the reproduction modes of these reproduction data are diversified, and setting information for the individual reproduction data and data indicating the mutual relationship between selectable data to be reproduced in the same time zone. It is necessary to provide mutual information or data content information for providing information for selection to the user.

However, conventionally, such setting information, mutual information, or content information is fixed or stored in a fixed area of the entire disk due to the small amount of data on the disk. However, the number of selections is small, and there is a problem that there is no information for some information.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reproduce, on a disk on which a plurality of data of different types is recorded, an optimum reproduction mode according to each data attribute. An object of the present invention is to provide an optical disk that can be set in a system.

Another object of the present invention is to easily acquire data attributes of an audio stream or a sub-picture stream having a designated number when there are a plurality of audio streams or sub-picture streams with respect to video data, and according to the attributes. An object of the present invention is to provide an optical disc on which a reproduction system can be set.

It is a further object of the present invention to provide an optical disk capable of setting an optimum mixing of audio streams in a reproduction system for a plurality of audio streams reproduced in the same time zone as video data.

Still another object of the present invention is to provide an optical disk capable of providing attribute information of a plurality of audio streams and sub-picture streams selectable for video data to a user.

It is an object of the present invention to provide an optical disk on which a plurality of data of different types is recorded, wherein an optimum reproduction mode according to each data attribute can be set in a reproduction system.

[0011]

According to the present invention, a video management area and at least one or more title set areas defined between a lead-in area and a lead-out area and separated by a logical sector boundary are provided. In an optical disc having a data recording area configured, the title set area continuously records video, audio, and sub-picture packs in which video, audio, and sub-picture data constituting the title set are stored, respectively. Has a title set information area in which title set information for controlling reproduction of the area to be reproduced and the video, audio and sub-picture data is recorded,
The title set information includes video attribute information, audio attribute information, and sub-picture attribute information for appropriately reproducing video, audio, and sub-picture data of the title set, and the video management area includes the title set. An optical disc characterized by recording reproduction control information of the title set including an attribute information table in which video attribute information, audio attribute information and sub-picture attribute information are described for each title set. You.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an optical disc and an optical disc reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of an optical disc reproducing apparatus for reproducing data from an optical disc according to an embodiment of the present invention, and FIG. 2 shows a block diagram of a disc drive section for driving the optical disc shown in FIG. FIG. 3 and FIG. 4 show the structure of the optical desk shown in FIG. 1 and FIG.

[0014] As shown in FIG.
Key operation / display unit 4, monitor unit 6, and speaker unit 8
Is provided. Here, the user operates the key operation / display unit 4
The recorded data is reproduced from the optical disk 10 by operating. The recording data includes video data, sub-picture data, and audio data, which are converted into a video signal and an audio signal. The monitor unit 6 displays video by a video signal, and the speaker unit 8 generates sound by an audio signal.

As already known, the optical disk 10 has various structures. The optical disk 10 includes, for example, a read-only disk on which data is recorded at a high density, as shown in FIG. As shown in FIG. 3, the optical disc 10 includes a pair of composite layers 18 and an adhesive layer 20 interposed between the composite layers 18. Each of the composite disk layers 18 includes a transparent substrate 14 and a recording layer, that is, a light reflecting layer 16. The disk layer 18 is arranged such that the light reflection layer 16 contacts the adhesive layer 20. The optical disc 10 is provided with a center hole 22. Clamping areas 2 for holding the optical disc 10 during rotation are provided around the center holes 22 on both sides thereof.
4 are provided. When the disk 10 is loaded in the optical disk device, the spindle of the spindle motor 12 shown in FIG. Is done.

As shown in FIG. 3, the optical disk 10 is provided around the clamping area 24 on both sides thereof.
Has an information area 25 in which information can be recorded. Each information area 25 has an outer peripheral area defined as a lead-out area 26 where information is not normally recorded, and an inner peripheral area adjacent to the clamping area 24 is similarly defined as a lead-in area 27 where information is not normally recorded. And
A space between the lead-out area 26 and the lead-in area 27 is defined as a data recording area 28.

In the recording layer 16 of the information area 25, usually, tracks are continuously formed in a spiral shape as areas in which data is recorded, and the continuous tracks are divided into a plurality of physical sectors. The sectors are numbered consecutively, and data is recorded based on the sectors.
The data recording area 28 of the information recording area 25 is an actual data recording area. As described later, reproduction information, video data, sub-picture data, and audio data are similarly pits (that is, changes in physical state). It is recorded as. In the read-only optical disk 10, the transparent substrate 1
4, a pit row is formed in advance by a stamper, a reflective layer is formed by vapor deposition on the surface of the transparent substrate 14 on which the pit row is formed, and the reflective layer is formed as the recording layer 16. In the read-only optical disc 10, no groove is usually provided as a track, and a pit row formed on the surface of the transparent substrate 14 is defined as a track.

As shown in FIG. 1, the optical disk device 12 further includes a disk drive unit 30, a system CPU unit 50, a system ROM / RAM unit 52, a system processor unit 54, a data RAM unit 56, and a video decoder unit 58. , An audio decoder section 60, a sub-picture decoder section 62, and a D / A and data reproducing section 64.

As shown in FIG.
Is a motor drive circuit 11, a spindle motor 12,
An optical head 32 (that is, an optical pickup), a feed motor 33, a focus circuit 36, a feed motor drive circuit 37, a tracking circuit 38, a head amplifier 40, and a servo processing circuit 44 are provided. Optical disk 10
Is mounted on a spindle motor 12 driven by a motor drive circuit 11, and is rotated by the spindle motor 12. An optical head 32 for irradiating the optical disk 10 with a laser beam is placed below the optical disk 10. The optical head 32 is mounted on a guide mechanism (not shown). Feed motor drive circuit 3
7 is provided for supplying a drive signal to the feed motor 33. The motor 33 is driven by a drive signal to move the optical head 32 in the radial direction of the optical disc 10. The optical head 32 includes an objective lens 34 facing the optical disc 10. The objective lens 34 is moved along its optical axis according to the drive signal supplied from the focus circuit 36.

In order to reproduce data from the optical disk 10 described above, the optical head 32 irradiates the optical disk 10 with a laser beam via the objective lens 34. The objective lens 34 is finely moved in the radial direction of the optical disc 10 according to the drive signal supplied from the tracking circuit 38.
The objective lens 34 has a focusing circuit 36 such that its focal point is located on the recording layer 16 of the optical disk 10.
Is finely moved along the optical axis direction in accordance with the drive signal supplied from. As a result, the laser beam forms a minimal beam spot on the spiral track (ie, pit train), and the track is tracked by the light beam spot. The laser beam is reflected from the recording layer 16 and the optical head 3
Returned to 2. The optical head 32 converts the light beam reflected from the optical disk 10 into an electric signal, and the electric signal is supplied from the optical head 32 to the servo processing circuit 44 via the head amplifier 40. In the servo processing circuit 44,
A focus signal, a tracking signal, and a motor control signal are generated from the electric signal, and these signals are respectively referred to as a focus circuit 36, a tracking circuit 38, and a motor drive circuit 11.
To supply.

Accordingly, the objective lens 34 is moved along its optical axis and the radial direction of the optical disk 10, its focal point is located on the recording layer 16 of the optical disk 10, and the laser beam focuses the minimum beam spot on the spiral track. Form. Further, the spindle motor 12 is rotated at a predetermined rotation speed by the motor drive circuit 11. as a result,
The pit train on the optical disk 10 is tracked by a light beam at a constant linear velocity.

A control signal as an access signal is supplied to the servo processing circuit 44 from the system CPU 50 shown in FIG. In response to this control signal, the servo processing circuit 4
4 supplies a head movement signal to a feed motor drive circuit 37, which converts the drive signal to a feed motor 3
3 will be supplied. Therefore, the feed motor 33
Is driven, and the optical head 32 is moved in the radial direction of the optical disk 10. Then, a predetermined sector formed on the recording layer 16 of the optical disk 10 is accessed by the optical head 32. The reproduced data is reproduced from the predetermined sector, supplied from the optical head 32 to the head amplifier 40, amplified by the head amplifier 40, and output from the disk drive unit 30.

The output reproduced data is stored in the system RO.
The data is stored in the data RAM unit 56 by the system processor unit 54 under the control of the system CPU unit 50 controlled by a program recorded in the M and RAM unit 52. The stored reproduction data is processed by the system processor 54 and classified into video data, audio data, and sub-picture data. The video data, audio data, and sub-picture data are
The data is output to the audio decoder section 60 and the sub-picture decoder section 62 and decoded. The decoded video data, audio data, and sub-picture data are converted by a D / A and reproduction processing circuit 64 into a video signal as an analog signal,
The video signal is supplied to the monitor 6 and the audio signal is supplied to the speaker unit 8 while being converted into the audio signal. As a result, video is displayed on the monitor unit 6 by the video signal and the sub-video signal, and sound is reproduced from the speaker unit 8 by the audio signal.

The detailed operation of the optical disk apparatus shown in FIG. 1 will be described later in detail with reference to a logical format of the optical disk 10 described below.

The data recording area 28 from the lead-in area 27 to the lead-out area 26 of the optical disk 10 shown in FIG. 1 has a volume and file structure as shown in FIG. This structure complies with a specific standard as a logical format, for example, micro UDF (micr
oUDF) and ISO9660. As described above, the data recording area 28 is physically divided into a plurality of sectors, and the physical sectors are assigned serial numbers. In the following description, the logical address is
A logical sector number (LSN) means a logical sector number (LSN) as defined by microUDF (microUDF) and ISO9660, and the logical sector is 2048 bytes like the size of the physical sector, and the logical sector number (LSN) is the physical sector number. The serial numbers are added together with the ascending order.

As shown in FIG. 4, the volume and file structure has a hierarchical structure, and includes a volume and file structure area 70, a video manager (VMG) 7
1, at least one or more video title sets (VT
S) 72 and another recording area 73. These areas are partitioned on logical sector boundaries. Here, one logical sector is defined as 2048 bytes as in the conventional CD. Similarly, one logical block is 204
It is defined as 8 bytes, so one logical sector is defined as one logical block.

The file structure area 70 contains a micro UDF
The video manager 71 is stored in the system ROM / RAM unit 52 via the description of this management area defined in ISO9660. The video manager 71 describes information for managing a video title set as described with reference to FIG.
, And a plurality of files 74 starting with. Each video title set (VTS) 72 stores compressed video data, audio data, sub-picture data, and their reproduction information, as described later, and is similarly composed of a plurality of files 74. . Here, the plurality of video title sets 72 are limited to a maximum of 99, and the number of files 74 (File # j to File # j + 11) constituting each video title set 72 is as follows.
The maximum is set to 12. These files are similarly partitioned at logical sector boundaries.

In the other recording area 73, information which can use the video title set 72 described above is recorded.
The other recording area 73 need not always be provided.

As shown in FIG. 5, the video manager 71
Includes three items each corresponding to each file 74. That is, the video manager 71 includes a video manager information (VMGI) 75 and a video object set (VMGM_V) for a video manager menu.
OBS) 76 and a backup (VMGI_BUP) 77 of the video manager information. Here, the video manager information (VMGI) 75 and the backup 77 of the video manager information (VMGI_B
UP) 77 is a mandatory item, and is a video object set (VMGM_) for the video manager menu.
VOBS) 76 is optional. This VM
Video object set for GM (VMGM_VOB
In S) 76, video data, audio data, and sub-picture data of a menu related to a volume in the optical disc managed by the video manager 71 are stored.

The volume name of the optical disk, such as the reproduction of video described later by the VMGM video object set (VMGM_VOBS) 76,
A description of the audio and the sub-picture accompanying the volume name display is displayed, and selectable items are displayed in the sub-picture. For example, a video object set for VMGM (VMG
(M_VOBS) 76, the fighting pose of Boxer X is reproduced in the video data along with the fact that the optical disc is video data storing a game up to a certain boxer world champion, that is, the volume name such as the glorious history of Boxer X. At the same time, his theme song is displayed in audio and his chronology is displayed in the sub-picture. In addition, the user is asked whether to select the language of the game narration, such as English or Japanese, as a selection item, and whether to display subtitles in another language in the sub-video, or to select subtitles in any language. The question is asked. This VMGM video object set (V
The MGM_VOBS) 76 allows the user, for example, to prepare to watch the video of the game of Boxer X, using English subtitles in English and Japanese subtitles.

Here, the structure of the video object set (VOBS) 82 will be described with reference to FIG. FIG. 6 shows an example of the video object set (VOBS) 82. This video object set (VO
BS) 82 includes three types of video object sets (VOB) for two menus and a title.
S) There are 76, 95 and 96. That is, the video object set (VOBS) 82 includes the video object set (VTSM) for the menu of the video title set in the video title set (VTS) 72 as described later.
_VOBS) 95 and a video object set (VTSTT_VOBS) 96 for the titles of at least one or more video title sets, and all the video object sets 82 have the same structure except that their uses are different.

As shown in FIG. 6, a video object set (VOBS) 82 is defined as a set of one or more video objects (VOBs) 83, and a video object 8 in the video object set (VOBS) 82.
3 are provided for the same purpose. Normally, a menu video object set (VOBS) 82 is composed of one video object (VOB) 83 and stores data for displaying a plurality of menu screens. On the other hand, the video object set (V
The TSTT_VOBS 82 usually includes a plurality of video objects (VOBs) 83.

Here, a video object (VOB) 8
3 corresponds to the video data of each game of the boxer X in the case of the above-mentioned boxing video, and specifies a video object (VOB), for example, the video of the eleventh game to challenge the world champion. Can be reproduced. Also, a menu video object set (VTSM_VO) of the video title set 72 is set.
The BS) 95 stores the menu data of the game of the boxer X, and according to the display of the menu, a specific game, for example, the eleventh game to challenge the world champion can be designated. In a normal one-story movie, one video object (VOB) 83 corresponds to one video object set (VOBS) 82, and one video stream corresponds to one video object set (VOB).
S) is completed at 82. In the case of an animation collection or an omnibus movie, a plurality of video streams corresponding to each story are provided in one video object set (VOBS) 82, and each video stream is stored in a corresponding video object. Therefore, the audio stream and sub-picture stream associated with the video stream are also included in each video object (VO).
B) It will be completed in 83.

The video object (VOB) 83 includes
An identification number (IDN # j) is attached, and the video object (VOB) 83 can be specified by the identification number. The video object (VOB) 83 includes one or a plurality of cells 84. A normal video stream is composed of a plurality of cells, but a menu video stream, that is, a video object (VOB) 83 may be composed of one cell 84 in some cases. Similarly, an identification number (C_IDN # j) is assigned to the cell, and the cell 84 is specified by the cell identification number (C_IDN # j).

As shown in FIG. 6, each cell 84 includes one or a plurality of video object units (VOBU) 85, usually a plurality of video object units (VOBU).
85. Here, the video object unit (VOBU) 85 is defined as a pack sequence having one navigation pack (NV pack) 86 at the top. That is, the video object unit (VOB)
U) 85 is defined as a set of all packs recorded from one navigation pack 86 to immediately before the next navigation pack. The playback time of the video object unit (VOBU) is determined by one or more GOPs included in the video object unit (VOBU).
And the playback time is determined so as to be 0.4 seconds or more and not more than 1 second. In MPEG, one GOP is usually 0.5 seconds, and is defined as compressed screen data for reproducing about 15 images during that time.

As shown in FIG. 6, when the video object unit includes video data, a video pack (V pack) 88, a sub-picture pack (SP pack) 90, and an audio pack (A pack) defined by the MPEG standard.
A video data stream is formed by arranging GOPs composed of the GOPs 91. Regardless of the number of GOPs, a video object unit (VOBU) 85 is determined based on the playback time of the GOPs, and is provided at the head of the video object unit. , A navigation pack (NV pack) 86 is always arranged. In addition, even in the case of reproduction data of only audio and / or sub-picture data, reproduction data is configured with this video object unit as one unit. That is, even if a video object unit is composed of only audio packs, an audio pack to be reproduced within the reproduction time of the video object unit to which the audio data belongs is stored in the video object unit, similarly to the video object of the video data. You.

Referring again to FIG.
1 will be described. The video management information 75 arranged at the top of the video manager 71 includes information on the video manager itself, information for searching for titles, information for reproducing the video manager menu, and video title attribute information. Title set (VT
S) Information for managing 72 is described, and three tables 78, 79, and 80 are recorded in the order shown in FIG. Each of the tables 78, 79, and 80 matches the boundary of the logical sector. A video management information management table (VMGI_MAT) 78, which is a first table, is an indispensable table.
The start address of the video object set (VMGM_VOBS) 76 for the video manager menu and its attribute information are described. As will be described in detail later, the attribute information includes video attribute information, audio attribute information, and sub-picture attribute information. The mode of the decoders 58, 60, and 62 is changed according to the attribute information, and the video object set is changed. (VMGM_VOBS)
76 is played in the appropriate mode.

Also, the second video manager information 75
The title search pointer table (TT_SRPT) 79, which is the table of FIG.
The start address of the video title set included in the volume on the optical disc 10 which can be selected in response to the input of the title number from is described.

A video title set attribute table (VTS) which is a third table of the video manager information 75
_ATRT) 80 describes attribute information defined in the video title set (VTS) 72 in the volume of the optical disc. That is, as attribute information, the number of video title sets (VTS) 72, the number of video title sets (VTS) 72, the attributes of video, for example, the compression method of video data, and the attributes of audio streams, for example, the encoding mode of audio And the like, the attributes of the sub-picture, for example, the display type of the sub-picture, etc. are described in this table.

The volume management information management table (VMG
I_MAT) 78, title search pointer table (TT_SRPT) 79 and video title set attribute table (VTS_ATRT) 80 will be described in detail below with reference to FIGS.

As shown in FIG. 7, in the volume management information management table (VMGI_MAT) 78, the identifier (VMG_ID) of the video manager 71 and the number of logical blocks (one logical block is 2048 bytes as described above) are recorded. Size of management information (VMGI_S
Z), the optical disk, commonly known as a digital versatile disk (digital versatile disk: hereinafter simply referred to as DV)
Called D. ) Standard version number (VER
N) and the category of the video manager 71 (VMG
_CAT).

Here, in the category (VMG_CAT) of the video manager 71, a flag or the like indicating whether or not the DVD video directory is prohibited from being copied is described. Also, this table (VMGI_MAT) 78
Contains a volume set identifier (VLMS_ID),
The number of video title sets (VTS_Ns) and the identifier of the supplier of the data recorded on this disc (PVR_I
D), a start address (VMGM_VOBS_SA) of a video object set (VMGM_VOBS) 76 for a video manager menu, and a management table (VMGI_MAT) 78 of volume manager information
, The start address (TT_SRPT_SA) of the title search pointer table (TT_SRPT) 79 is described. The video object set (V
If there is no MGM_VOBS) 95, the start address (VMGM_VOBS_SA) contains “00000”.
000h "is described. The end address (VMGI_MAT_EA) of the VMGI_MAT78 is VMGI_MAT78.
Described in the relative number of bytes from the beginning of MAT78,
Start address of TT_SRPT79 (TT_SRP
T_SA) is described by the number of logical blocks relative to the first logical block of the VMGI 75.

The table 78 further includes an attribute table (VTS_A) of the video title set (VTS) 72.
TRT) 80 start address (VTS_ATRT_
SA) is the VMGI manager table (VMGI_M
AT) 71 is described in the relative number of bytes from the first byte, and the video attribute (VMGM_V_) of the video manager menu (VMGM) video object set 76 is described.
ATR). Furthermore, this table 7
8, the number of audio streams (VMGM_AST_Ns) in the video manager menu (VMGM);
The attribute of the audio stream (VMGM_AST_ATR) of the video manager menu (VMGM), the number of sub-video streams (VMGM_SPST_Ns) of the video manager menu (VMGM), and the attribute (VMGM_SPST_ATR) of the sub-video stream of the video manager menu (VMGM) are described. I have.

As shown in FIG. 8, the video attributes (VMGM_V_ATR) include the compression mode, the frame rate, and the display aspect ratio as the attributes of the video object set 76 of the video manager menu (VMGM) from bit number b8 to bit number b15 as shown in FIG. , And the display mode are described, and bit numbers b0 to b7
Is reserved for future use as a reservation. If “00” is described in bit numbers b15 and b14, MP
This means that the menu video data is compressed in the video compression mode based on the EG-1 standard. If “01” is described in the bit numbers b15 and b14,
This means that the menu video data is compressed in the video compression mode based on the MPEG-2 standard, and the other description is reserved for future use. When "00" is described in the bit numbers b13 and b12, it means that the menu video data has a frame rate (29.27 / S) at which 29.27 frames are reproduced every second. That is, bit numbers b13, b12
Is described as "00", the menu video data is video data for a TV system adopting the NTSC system, and one frame corresponds to a horizontal scanning frequency of 60.
hz means that a frame rate of 525 scanning lines is adopted. Also, bit number b13,
When "01" is described in b12, it means that the menu video data has a frame rate (25 / S) at which 25 frames are reproduced per second. That is, P
This is video data for a TV system adopting the AL system.
This means that the frame rate described in the book is used. , Bit numbers b13 and b12 are reserved for future use.

Further, "0" is set in the bit numbers b11 and b10.
When "0" is described, the menu video data means that the display aspect ratio (vertical / horizontal ratio) is 3/4, and "1" is added to the bit numbers b11 and b10.
When "1" is described, the menu video data has a display aspect ratio (vertical / horizontal ratio) of 9/16, and the other description is reserved for future use. ing.

Further, when the display aspect ratio is 3/4, that is, when "00" is described in the bit numbers b11 and b10, "11" is described in the bit numbers b9 and b8. You. The display aspect ratio is 9 /
16; that is, the bit numbers b11 and b10
When "11" is described, it is described whether or not display of menu video data in pan scan and / or letter box is permitted. That is, "00" is set in bit numbers b9 and b8. If described,
Bit numbers b9, b8 mean that display is permitted in both pan scan and letter box.
When "01" is described in the field, it means that display by pan scan is permitted, but display in letterbox is prohibited. Also, bit numbers b9, b8
When "10" is described in the field, it means that display by pan scan is prohibited, but display by letterbox is permitted. When "11" is described in the bit numbers b9 and b8, it means that no particular specification is made.

FIG. 9 shows the relationship between the video data recorded on the optical disc and the reproduced screen image on the TV monitor 6. The video data is displayed as shown in FIG. 9 since the display aspect ratio is described in the bit numbers b11 and b10 and the display mode is described in the bit numbers b9 and b8 as the attribute information described above. Original display aspect ratio (bit number b11,
The image data whose b10 is “00”) is ／ and is compressed and recorded as it is. That is, image data in which a circle is drawn at the center as shown in FIG. 9 and four small circles are arranged around the circle are displayed in a normal display mode (bit numbers b9 and b8 are "00") and a pan scan (bit In both cases where the numbers b9 and b8 are "01") and the letter box (bit numbers b9 and b8 are "10"), T
A circle is drawn at the center as it is on the TV monitor 6 having a V aspect ratio of 3/4 without changing the display form, and displayed as an image in which four small circles are arranged around the center. Further, the image data is displayed as an image in which a circle is drawn at the center without changing the display mode even on a TV monitor 6 having a TV aspect ratio of 9/16, and four small circles are arranged around the circle. Thus, only an area where no image is displayed occurs on both sides of the screen of the TV monitor 6.

On the other hand, image data having a display aspect ratio (bit numbers b11 and b10 are "11") of 9/16 is compressed in a state where it is transformed into a vertically long display so as to have an aspect ratio of 3/4. Recorded. That is, a 9/16 of 9/16 having a large circle and eight small circles in which a circle is originally drawn at the center, four small circles are arranged around the center, and a small circle is arranged outside the small circle. An image having a display aspect ratio is compressed and recorded as data in which all circles are transformed into a vertically long display. Therefore, when the display mode is normal (bit numbers b9 and b8 are "00"), a vertically long circle is drawn at the center of the TV monitor 6 having a TV aspect ratio of 3/4 without changing the display form, and the circle is drawn around the center. Four vertically long small circles are arranged, and the image is displayed as an image having one large circle and eight small circles in which the vertically long small circles are arranged outside the small circles. On the other hand, the display mode is pan scan (bit numbers b9, b8
Is "01"), the shape of the circle is not vertically long,
The image is drawn as an original circle, but the periphery of the screen is trimmed, the small circle outside the small circle is cut, a circle is drawn at the center, and four small circles are placed around the center. It is displayed on the TV monitor 6 having 3/4. When the display mode is letterbox (bit numbers b9 and b8 are "10"), the aspect ratio does not change, so that the shape of the circle is not vertical, but is drawn as an original circle. The screen, that is, one large circle and eight small circles are displayed, but in the upper and lower areas on the screen, the TV aspect ratio is 3/4 with no image displayed.
Is displayed on the TV monitor 6 having Naturally, a TV monitor 6 having a TV aspect ratio of 9/16
Indicates the display aspect ratio of the image data (bit number b1
Since 1, b10 coincides with "11"), a normal circle is drawn in the center as it is, four normal small circles are arranged around it, and similarly normal small circles are arranged outside the small circles Displayed as an image having one large circle and eight small circles.

As described above, when image data having a display aspect ratio (bit numbers b11 and b10 are "11") of 9/16 is displayed on the TV monitor 6 having a TV aspect ratio of 3/4, a screen is used. In the upper and lower regions, there is a portion where no image is displayed, but this portion has a frame rate of drawing one frame at a horizontal scanning frequency of 60 Hz and 525 scanning lines (bit numbers b13 and b12 are set to "01").
Is described. ), The upper and lower 72 horizontal scanning lines are black (Y = 16, U = V = 128) as shown in FIG. 10A.
And is displayed as black. In the case of a frame rate in which one frame is drawn at a frequency of 50 Hz with 625 scanning lines (bit numbers “b13” and “b12” are described as “00”), as shown in FIG. Is horizontal (Y = 16, U = V = 1)
28), and is similarly displayed as black.

The contents of the table shown in FIG. 7 will be described again. Video Manager menu (VMGM)
Attribute of the audio stream (VMGM_AST_A)
TR) has a bit number b63 as shown in FIG.
The bit number b48 describes the audio coding mode, audio type, audio application ID, quantization, sampling frequency, and the number of audio channels, and the bit numbers b47 to b0 are reserved for future use. . VMG
If there is no M-video object set 76, or
If there is no audio stream in the video object set, bit numbers b63 to b0
"0" is described in each bit of. The audio coding mode includes bit numbers b63 to b61.
It is described in. If “000” is described in this audio coding mode, the Dolby AC-3
(Trademark of Dolby Labratories Licensing Corporation) means that the audio data is encoded,
When "010" is described in the audio coding mode, MPEG-1 without the extension bit stream is used.
Alternatively, it means that the audio data is compressed by MPEG-2. If “011” is described in the audio coding mode, it means that audio data is compressed by MPEG-2 with the extension bit stream, and “100” is described in the audio coding mode. In case, linear PC
M means that the audio data is coded. Other descriptions of audio data are reserved for future use. In the attributes of the video data, one frame is composed of 5 horizontal lines at a horizontal scanning frequency of 60 Hz.
In the case of a frame rate drawn with 25 lines (“01” is described in bit numbers b13 and b12 in VMGM_V_ATR), Dolby AC-3 (bit number b6
3, b62 and b61 are “000”) or linear PC
M (bit numbers b63, b62, and b61 are "100")
Is to be set. Further, in the attribute of the video data, a frame rate (VMGM_V_V_
In the ATR, "01" is described in bit numbers b13 and b12. ), MPEG-1, MPEG-2
(Bit numbers b63, b62, b61 are "010" or "011") or linear PCM (bit number b6
3, b62 and b61 should be set to "100").

The audio type is described in bit numbers b59 and b58. If not specified, "00" is described, and the others are reserved. The ID of the audio application field is described in bit numbers b57 and b56, and if not specified, "00" is described.
Others are reserved. Further, quantization of audio data is described in bit numbers b55 and b54, and when bit numbers b55 and b54 are "00",
When the bit numbers b55 and b54 are "01", it means that the audio data is quantized by 16 bits, and the bit numbers b55 and b54 indicate that the audio data is quantized by 20 bits. Is "10", it means that the audio data is quantized by 24 bits, and the bit numbers b55 and b54 are "1".
In the case of “1”, it is not specified. Here, the audio coding mode is linear PCM (bit number b).
When 63, b62, and b61 are set to “100”, quantization is not specified (bit numbers b55, b5
4 is "11"). The sampling frequency Fs of the audio data is described in bit numbers b53 and b52, and the sampling frequency Fs is 48 KH.
When the sampling frequency is z, "00" is described. When the sampling frequency Fs is 96 KHz, "01" is described, and the others are reserved.

The number of audio channels is described in bit numbers b50 to b48.
When b49 and b48 are “000”, it means that the channel is one channel (monaural), and the bit number b5
If 0, b49 and b48 are "0001", 2
It means that it is a channel (stereo). If the bit numbers b50, b49, and b48 are "010", it means that there are three channels. If the bit numbers b50, b49, and b48 are "011", there are four channels. Means bit number b
When 50, b49, and b48 are “100”, 5
Channel means, bit number b50, b
When 49 and b48 are “101”, it means that the channel is 6 and bit numbers b50, b49, b
When 48 is "110", it means that there are 7 channels, and the bit numbers b50, b49, and b48 are "110".
If it is 111 ", it means that it is 8 channels.

The attribute (V) of the sub-picture stream in the video manager menu (VMGM) of the table shown in FIG.
MGM_SPST_ATR) describes the sub-picture coding mode, reservation, sub-picture display type, and sub-picture type in bit numbers b47 to b40 as shown in FIG. When “000” is described in the bit numbers b47, b46, and b45 as the description of the sub-picture coding mode, it indicates that the sub-picture data is run-length compressed based on the 2-bit / pixel type standard. Bit number b as the description of the sub-picture coding mode.
When “001” is described in 47, b46, and b45, it is described that the sub-picture data has been run-length compressed based on another standard, and the others are reserved.

The sub-picture display type has a bit number b44,
b43, b42, and the display aspect ratio in the VMGM_V_ATR is 3/4 (bit numbers b11, b10
Are “00”), the bit numbers b44, b43, b4
2, “000” is described, which means that this attribute information is not used. Also, VMGM_V_ATR
Display aspect ratio is 9/16 (bit number b11,
b10 is "11") and bit numbers b44, b43, b
When "42" is "001", this means that this sub-picture stream allows only wide display, and the bit number b44,
When b43 and b42 are "010", it means that this sub-picture stream allows only letterbox display,
When the bit numbers b44, b43, b42 are "011", this means that this sub-picture stream allows both wide display and letterbox display, and the bit numbers b44, b43, b42 are "011". 100 "
In the case of, this sub-video stream means that this sub-video stream allows only pan-scan display, and if the bit numbers b44, b43, b42 are "110",
Bit stream number b4 means that this sub-picture stream allows both pan scan display and letter box display.
When 4, b43 and b42 are "111", it means that this sub-picture stream allows all of pan-scan display, letterbox display and wide display. Furthermore,
The sub-picture type is described in the bit numbers b41 and b40. When the bit numbers b41 and b40 are “00”, the sub-picture type is not specified and the others are reserved.

The structure shown in FIG. 5 will be described again.
The title search pointer table (TT_
As shown in FIG. 13, the SRPT 79 first describes the information (TSPTI) of the title search pointer table, and then sets the number of title search pointers (TT_SRP) required for input numbers 1 to n (n ≦ 99). Are only listed continuously. When only one title of reproduction data, for example, one title of video data is stored in the volume of the optical disc, only one title search pointer (TT_SRP) 93 is described in the table (TT_SRPT) 79.

The title search pointer table information (TSPTI) 92 contains the number of entry program chains (EN_PGC_Ns) as shown in FIG.
In addition, an end address (TT_SRPT_EA) of the title search pointer (TT_SRP) 93 is described. This address (TT_SRPT_EA) is stored in the title search pointer table (TT_SRPT) 79.
Is written in the number of bytes relative to the first byte of As shown in FIG. 15, each title search pointer (T
T_SRP) contains the video title set number (VTS
N), the program chain number (PGCN), and the start address (VTS_S) of the video title set 72.
A) is described.

The title search pointer (TT_SR)
P) 93, the video title set (VTS) 72 reproduced according to the contents of the program chain (PG
C) is specified and its video title set 7
2 is specified. Video title set 72
The start address (VTS_SA) describes the title set specified by the video title set number (VTSN) in the number of logical blocks.

Here, the program chain 87 is defined as a set of programs 89 for reproducing a story of a certain title as shown in FIG. In the menu program chain, a still image or moving image program is reproduced one after another to complete a menu of one title. Also, in the case of a program chain for a title set, a program chain corresponds to a certain chapter in a story including a plurality of programs, and the program chain is continuously reproduced.
The title movie is completed. As shown in FIG. 16, each program 89 is defined as a set of the previously described cells 84 arranged in the reproduction order.

As shown in FIG. 5, a video title set attribute table (VTS_ATRT) 80 which describes attribute information of a video title set (VTS) 72 includes video title set attribute table information (VTS_ATRT).
I) 66, n video title set attribute search pointers (VTS_ATR_SRP) 67 and n video title set attributes (VTS_ATR) 68, which are described in that order. The video title set attribute table information (VTS_ATRTI) 66 describes the information of this table 80, and the video title set attribute search pointer (VTS_ATR_SRP) 67
Search for a video title set attribute (VTS_ATR) 68 described in the order corresponding to the title sets from # 1 to #n and similarly described in the order corresponding to the title sets from # 1 to #n. Describes pointers. In each of the video title set attributes (VTS_ATR) 68, the attribute of the corresponding title set (VTS) is described.

More specifically, the video title set attribute table information (VTS_ATRTI) 66 includes FIG.
As shown in the figure, the number of video titles is a parameter (VTS
_Ns), and the end address of the video title set attribute table (VTS_ART) 80 is described as a parameter (VTS_ATRT_EA). As shown in FIG. 19, each video title set attribute search pointer (VTS_ATR_SRP) 6
7 has a corresponding video title set attribute (VTS_
The start address of the ATR 68 is the parameter (VTS_A).
TR_SA). Further, the video title set attribute (VTS_ATR) 68 includes the video title set attribute (VTS_A) as shown in FIG.
TR) 68 is the parameter (VTS_AT)
R_EA), and the category of the corresponding video title set is described as a parameter (VTS_CAT). Furthermore, in the video title set attribute (VTS_ATR) 68, attribute information of the corresponding video title set includes a parameter (VTS_ATRI).
It is described as The attribute information of the video title set includes a video title set information management table (VTS_MA) described later with reference to FIGS. 21 and 22.
Since the same content as the attribute information of the video title set described in T) is described, the description is omitted.

Next, the structure of the logical format of the video title set (VTS) 72 shown in FIG. 4 will be described with reference to FIG. Each video title set (V
In the TS) 72, four items 94, 95, 96, and 97 are described in the order of description as shown in FIG. Each video title set (VTS) 72 includes one or more video titles having a common attribute, and management information on the video title 72, for example, information for reproducing the video object set 96, Information for reproducing the title set menu (VTSM) and the attribute information of the video object set 96 are described in the video title set information (VTSI).

This video title set information (VTS
I) A backup 97 of 94 is provided in the video title set (VTS) 72. Video title set information (VTSI) 94 and a backup (V
TSI_BUP) 97, a video object set (VTSM_B) for a video title set menu.
VOBS) 95 and video object set for video title set title (VTSTT_VOBS) 9
6 are arranged. Any video object set (VTSM_VOBS and VTSTT_VOBS) 9
5, 96 have the structure shown in FIG. 6 as already described.

Video title set information (VTSI) 9
4. Backup of this information (VTSI_BUP) 97
A video object set (VTSTT_VOBS) 96 for a video title set title is an essential item for the video title set 72, and a video object set (VTSTT_VOBS) for a video title set menu.
TSM_VOBS) 95 is an option provided as needed.

Video title set information (VTSI) 9
4, seven tables 98, 99, as shown in FIG.
100, 101, 111, 112, and 113, and these seven tables 98, 99, 100, 101,
Reference numerals 111, 112 and 113 coincide with boundaries between logical sectors. The video title set information management table (VTSI_MAT) 98, which is the first table, is an essential table and is a video title set (VTS) 7
2, the start address of each information in the video title set (VTS) 72, and the video title set (VT).
S) Video object set (VOBS) 8 in 72
2 are described.

The second table, a video title set part of title search pointer table (VTS)
_PTT_SRPT) 99 is an essential table, which is included in the video title set 72 that can be selected according to the number input by the user from the key operation / display unit 4 of the apparatus, that is, the video title set 72 that can be selected. Program chain (PGC) and / or program (PG)
Is described. When the user designates an arbitrary number from among the input numbers described in the pamphlet with the key operation / display unit 4 along with the distribution of the optical disk 10, the user can watch the video from the portion in the story corresponding to the input number. This selectable title part can be arbitrarily determined by the title provider.

The video title set program chain information table (VTS_PGCI) which is the third table
T) 100 is an indispensable table that describes information on the VTS program chain, that is, VTS program chain information (VTS_PGCI).

The fourth table, a video title set menu PGCI unit table (VTSM_PG)
CI_UT) 111 is a video object set (VTSM_VOBS) for a video title set menu.
95 is a mandatory item when a video title set menu (VTS) is provided for each language.
Information on a program chain for reproducing M) is described. This video title set menu PGCI unit table (VTSM_PGCI_U
By referring to (T) 111, the program chain of the specified language in the video object set (VTSM_VOBS) 95 can be obtained and reproduced as a menu.

Video title set time search map table (VTS_MAPT) 1 which is the fifth table
Reference numeral 01 denotes an optional table provided as needed. Information relating to a recording position of video data in each program chain (PGC) of the title set 72 to which the map table (VTS_MAPT) 101 belongs for a certain period of reproduction and display is provided. is described.

The video title set cell address table (VTS_C_ADT) 112 which is the sixth table
Is an essential item, and as described with reference to FIG. 6, the addresses of the cells 84 constituting all the video objects 83 or the addresses of the cell pieces constituting the cells are described in the order of the identification numbers of the video objects. ing. Here, the cell piece is a piece constituting the cell, and the cells are arranged in the video object 83 by performing an interleaving process based on the cell piece. Seventh
Title table video object unit address map (VTS_VOBU_AD)
The (MAP) 113 is a required item, and the start addresses of the video object units 85 in the video title set are all described in the arrangement order.

Next, the video title set information management table (VTSI_MAT) 98 and the video title set program chain information table (V
TS_PGCIT) 100 will be described with reference to FIGS.

FIG. 22 shows the description contents of the video title set information management table (VTSI_MAT) 98. In this table (VTSI_MAT) 98, video title set identifiers (VTS_ID),
The size of the video title set 72 (VTS_SZ),
Version number (VERN) of this DVD video standard,
Category of video title set 72 (VTS_CA
T), and the end address (VTSI_MAT_EA) of the video title information manager table (VTSI_MAT) 98. Also, this table (VTSI_MAT) 98 includes VT
Start address (VTSM) of the video object set (VTSM_VOBS) 95 of the S menu (VTSM)
_VOBS_SA) and a video title set (VT)
The start address of the video object start address (VTSTT_VOB_SA) for the title in S) is described. Video object set (VTSM_VOBS) 95 of VT menu (VTSM)
If there is no start address (VTSM_VOB)
In “S_SA”, “00000000h” is described. End address of VTSI_MAT (VTSI_MA
T_EA) is described by the relative number of blocks from the first byte of the video title set information management table (VTSI_MAT) 94, and the start address of VTSM_VOBS (VTSM_VOBS_SA) and VTSTT_VOB.
The start address (VTSTT_VOB_SA) is described by the number of logical blocks (RLBN) from the first logical block of the video title set (VTS) 72.

Further, this table (VTSI_MAT)
Reference numeral 98 denotes a video title set part of title search pointer table (VTS_PTT_SRPT) 9
9 start address (VTS_PTT_SRPT_S
A) is described by the relative number of blocks from the first logical block of the video title set information (VTSI) 94. The table (VTSI_MAT) 98 includes a start address (VTS_PGCIT_SA) of the video title set program chain information table (VTS_PGCIT) 100 and a PGCI unit table (VTS_P) for the video title set menu.
GCI_UT) 111 start address (VTS_P)
GCI_UT_SA) is the video title set information (V
The start address (VTS_MAPT_SA) of the time search map table (VTS_MAPT) 101 of the video title set (VTS) is described in the relative number of blocks from the first logical block of the TSI (94). The logical sector is described as a relative logical sector. Similarly, the VTS address table (VTS_C_ADT) 112 and VTS_
VOBU address map (VTS_VOBU_ADM)
AP) 113 is the video title set (VTS) 7
It is described by a relative logical sector from the first logical sector of No. 2.

The table (VTSI_MAT) 98 includes a video attribute (VTSM_V_ATR) of a video object set (VTSM_VOBS) 95 for a video title set menu (VTSM) in a video title set (VTS) 72, and the number of audio streams (VTSM_AST_Ns). In addition, the audio stream attribute (VTSM_AST_ATR), the number of sub-picture streams (VTSM_SPST_Ns), and the sub-picture stream attribute (VTSM_SPST_ATR) are described. Similarly, this table (VTSI_MAT)
98, the title (VTST) of the video title set (VTS) in the video title set (VTS) 72
T) video object set (VTST_VO)
BS) 96, the video attribute (VTS_V_ATR), the number of audio streams (VTS_AST_Ns), and the audio stream attribute (VTS_AST_AT)
R), number of sub-picture streams (VTS_SPST_Ns)
And its sub-video stream attribute (VTS_SPST_A
TR) is described. Further, the attribute (VTS_MU_AST_ATR) of the multi-channel audio stream of the video title set (VTS) is described in this table (VTSI_MAT) 98.

The video attribute, audio stream attribute, and sub-picture stream attribute described in FIG. 22 will be described in detail below. The video attribute (VTSM_VOBS) of the video object set (VTSM_VOBS) 95 for VTSM
V_ATR) and video title set title (VT
Video object set (VTST_
The video attribute (VMTS_V_ATR) of the VOBS 96 includes the video attribute (VMGM_V) of the video object for the video manager menu (VMGM_VOBS) described with reference to FIGS. 8, 9, 10A, and 10B.
_ATR) is described. That is,
Video attributes (VTSM_V_ATR) and (VTS_V
_ATR) has a bit number b8 as shown in FIG.
The compression mode, the frame rate, the display aspect ratio, and the display mode are described as the attributes of the video object set 76 video of the video manager menu (VMGM) in the bit number b15, and the bit numbers b0 to b7 are reserved as future attributes. It is open for the sake of. If "00" is described in the bit numbers b15 and b14, it means that the menu video data is compressed in the video compression mode based on the MPEG-1 standard, and "00" is written in the bit numbers b15 and b14. When 01 "is described, it means that the menu video data is compressed in the video compression mode based on the MPEG-2 standard, and the other description is reserved for future use. I have. When “00” is described in the bit numbers b13 and b15, the video data for menu is 2 per second.
The frame rate at which 9.27 frames are reproduced (29.
27 / S). That is, when “00” is described in the bit numbers b13 and b12, the video data for the menu is a TV using the NTSC system.
This is video data for the system, which means that a frame rate of drawing one frame with a horizontal scanning frequency of 60 Hz and 525 scanning lines is adopted. When “01” is described in the bit numbers b13 and b12, it means that the menu video data has a frame rate (25 / S) at which 25 frames are reproduced per second. That is, it is video data for a TV system adopting the PAL system, and one frame has a frequency of 50 Hz.
Means that a frame rate drawn with 625 scanning lines is adopted. , Bit numbers b13 and b15 are reserved for future use.

Further, "0" is set in the bit numbers b11 and b10.
If “0” is described, the menu video data indicates that the display aspect ratio (vertical / horizontal ratio) is 3/4, and “1” is assigned to the bit numbers b11 and b10.
When "1" is described, the menu video data has a display aspect ratio (vertical / horizontal ratio) of 9/16, and the other description is reserved for future use. ing.

Further, when the display aspect ratio is 3/4, that is, when "00" is described in the bit numbers b11 and b10, "11" is described in the bit numbers b9 and b8. You. The display aspect ratio is 9 /
16; that is, the bit numbers b11 and b10
When "11" is described, it is described whether or not display of menu video data in pan scan and / or letter box is permitted. That is, "00" is set in bit numbers b9 and b8. If described,
Bit numbers b9, b8 mean that display is permitted in both pan scan and letter box.
When "01" is described in the field, it means that display by pan scan is permitted, but display in letterbox is prohibited. Also, bit numbers b9, b8
When "10" is described in the field, it means that display by pan scan is prohibited, but display by letterbox is permitted. When "11" is described in the bit numbers b9 and b8, it means that no particular specification is made. The relationship between the video data recorded on the optical disk and the reproduced screen image on the TV monitor 6 is the same as that described with reference to FIGS. 9, 10A and 10B, and a description thereof will be omitted.

The audio stream attribute (VTSM_AST_ATR) of the video object set (VTSM_VOBS) 95 for the VTSM and the audio stream attribute (VTS_AST_ATR) of the video object set (VTST_VOBS) 96 for the video title set title (VTSTT) are included in the video stream. In addition, attribute information substantially similar to the audio stream attribute (VMGM_AST_ATR) of the video object for the video manager menu (VMGM_VOBS) described with reference to FIG. 11 is described. That is, a video object set for a VTS menu (VTSM_VOBS)
95 audio stream attributes (VTSM_AST)
_ATR) has a bit number b as shown in FIG.
The audio coding mode, audio type, audio application ID, quantization, sampling frequency, reservation, and number of audio channels are described from 63 to bit number b48, and bit numbers b47 to b0 are reserved for future use. It is empty. The attribute (VTS_AST_ATR) of the audio stream of the video title set title (VTST) includes the audio coding mode, multi-channel extension, audio type, audio application ID, The quantization, the sampling frequency, and the number of audio channels are described, and bit number b47
A specific code is described in bit numbers b40 to b40 and bit numbers b39 to b32, and the bit number b
From 31 to bit number b24, a reservation for a specific code is provided. Bit numbers b23 to b8 are reserved for future use, and application information is described in bit numbers b8 to b0. Here, when there is no VTS menu video object set (VTSM_VOBS) 95, or
If there is no audio stream in the video object set, bit numbers b63 to b0
"0" is described in each bit of.

VTSM and VTST audio stream attributes (VTSM_AST_ATR, VTS_AS
T_ATR), the audio coding mode is described in bit numbers b63, b62, and b61. In this audio coding mode, "0"
00 ”is described, Dolby AC-3 (Dolby AC-3)
This means that audio data is coded by Labratories Licensing Corporation. If "010" is described in the audio coding mode, the audio data is encoded in MPEG-1 or MPEG-2 without an extended bit stream. Is compressed. When “011” is described in the audio coding mode, it means that the audio data is compressed by MPEG-2 with the extension bit stream, and “100” is described in the audio coding mode. In this case, it means that the audio data is encoded by the linear PCM. Other descriptions of audio data are reserved for future use. In the attributes of video data,
One frame is divided into 525 scanning lines at a horizontal scanning frequency of 60 Hz.
The frame rate (VTSM_V_ATR and V
Bit numbers b13 and b12 in TS_V_ATR
Is described as "00". ) In case, Dolby AC-
3 (bit numbers b63, b62, b61 are "000")
Alternatively, the linear PCM (bit numbers b63, b62, b
61 is set to "100"). Also, in the attribute of video data, when a frame rate of drawing one frame at a frequency of 50 Hz with 625 scanning lines ("01" is described in bit numbers b13 and b12 in VTSM_V_ATR and VTS_V_ATR), MPEG-1 is used. , MPEG-2 (bit numbers b63, b62, b61 are “010” or “01”
1 ") or linear PCM (bit numbers b63, b6
2, b61 should be set to "100"). VTST audio stream attribute (V
In the audio coding mode of (TS_AST_ATR), the multi-channel extension is described in the bit number b60. If the bit number b60 is “0”, the VTS related to the audio stream is
Multi-channel audio stream attribute (VTS
_MU_AST_ATR) is invalid, and when this bit number b60 is “1”, the multi-channel audio stream attribute (VTS_MU_AST_AT) of the VTS related to the audio stream
R).

The audio type is described in bit numbers b59 and b58. If not specified, "00" is described. If the audio type is a human voice, "0" is set.
1 "is described, and the others are reserved. The IDs of audio application fields are bit numbers b57 and b57.
56, if not specified, "00" is described. For karaoke, "01" is described. For surround, "10" is described. Others are reserved. . Further, the quantization of the audio data is described in the bit numbers b55 and b54, and when the bit numbers b55 and b54 are "00", it means that the audio data is 16-bit quantized audio data.
When the bit numbers b55 and b54 are “01”, 2
It means that the audio data is quantized with 0 bits, and the bit number numbers b55 and b54 are “10”.
Means audio data quantized by 24 bits, and bit number numbers b55 and b54
Is "11", it is determined not to be specified. Here, when the audio coding mode is set to linear PCM (bit numbers b63, b62, and b61 are “100”), quantization is not specified (bit number b
55 and b54 are described as "11"). The sampling frequency Fs of the audio data is described in bit numbers b69 and b68, and the sampling frequency Fs
Is 48 kHz, "00" is described. If the sampling frequency Fs is 96 kHz, "00" is described.
01 "is described, and the others are reserved.

The number of audio channels is described in bit numbers b50 to b48.
If b49 and b48 are “000”, it means that the channel is one channel (monaural), and the bit number b
If 50, b49 and b48 are “001”, 2
It means that it is a channel (stereo). If the bit numbers b50, b49, and b48 are “010”, it means that there are three channels. If the bit numbers b50, b49, and b48 are “011”, there are four channels. Means bit number b
When 50, b49 and b48 are “100”, 5
Channel means, bit number b50, b
If 49 and b48 are “101”, it means that the channel is 6 and bit number numbers b50 and b4
When 9 and b48 are “110”, it means that the channel is 7 and bit numbers b50, b49, and b4
When 8 is “111”, it means that the channel is 8 channels. Here, three or more channels are multi-channel. The specific code is described in b47 to b40 and b39 to b32, and here, when the type of the audio stream is a language, that is, when the audio stream is audio, the code of the language defined in ISO-639 is the language. Described by a symbol. If the type of audio stream is not language, i.e. voice, this area is reserved.

The number of VTS audio streams (VTS
_AST_Ns) is set between 0 and 8. For this reason, the attributes (VTS_AST_ATR) of the eight VTS audio streams corresponding to the settable number of streams
Is prepared. That is, VTSs from VTS audio stream # 0 to VTS audio stream # 7
When an area of an audio stream attribute (VTS_AST_Ns) is provided, and there are less than eight VTS audio streams and there is no corresponding audio stream, a VTS audio stream attribute (VTS_AST_N) shown in FIG.
In the description of Ns), all bits are “0”.

Further, a sub-picture stream attribute (VTSM_SPST_ATR) of a video object set (VTSM_VOBS) 95 for VTSM and a sub-picture stream attribute (VTS_SPST_ATR) of a video object set (VTSTT_VOBS) 96 for a video title set title (VTSTT) are provided. Describes the same attribute information as the sub-image stream attribute (VMGM_SPST_ATR) of the video object for the video manager menu (VMGM_VOBS) described with reference to FIG. That is, in the sub-picture stream attribute (VTSM_SPST_ATR) of the video object set (VTSM_VOBS) 95 for VTSM, the sub-picture coding mode, the sub-picture display type, The video type is described, and bit numbers b39 to b0 are reserved. In the sub-picture stream attribute (VTS_SPST_ATR) of the video object set (VTST_VOBS) 96 for VTSTT, as shown in FIG. 12, the sub-picture coding mode, the sub-picture display type, and the Is described, a specific code is described from bit number b39 to bit number b32, and a specific code is described from bit number b31 to bit number b24. A specific code is reserved from bit number b23 to bit number b16. An extension of a specific code is described. Further, bit number b7 to bit number b
0 is reserved.

When "000" is described in the bit numbers b47, b46, and b45 as the description of the sub-picture coding mode, the sub-picture data is run-length compressed based on the 2-bit / pixel type standard. Bit number b4 as a description of the sub-picture coding mode.
When “001” is described in 7, b46, and b45, it is described that the sub-picture data is run-length compressed based on another standard, and the others are reserved. In the reservation, for example, the fact that the encoding method is Row encoding indicating that the video data is uncompressed sub-picture data may be described.

The sub-picture display type has a bit number b44,
b43, b42, and the display aspect ratio in VTSM_V_ATR or VMGM_V_ATR is 3
/ 4 (bit numbers b11 and b10 are “00”),
"000" is described in the bit numbers b44, b43, and b42, which means that this attribute information is not used. VTSM_V_ATR or VMGM_V
_ATR has a display aspect ratio of 9/16 (bit numbers b11 and b10 are “11”) and bit numbers b44 and b
When 43 and b42 are "001", this means that this sub-picture stream allows only wide display, and when bit numbers b44, b43 and b42 are "010", this sub-picture stream is letterboxed. Bit number b44, b43, b42 is "01", meaning that only display is allowed.
If the bit number b44, b43, b42 is "100", this sub-picture stream means that this sub-picture stream allows both wide display and letterbox display. The video stream means that this sub-video stream allows only pan-scan display, and when the bit numbers b44, b43, and b42 are "110", this sub-video stream performs both pan-scan display and letter-box display. It means to allow, and when the bit numbers b44, b43, b42 are "111",
This means that this sub-picture stream allows all of pan-scan display, letterbox display, and wide display. Further, for the sub-picture type, the bit number b4
1 and b40, and the bit numbers b41 and b40 are "
If it is 00 ", the bit number b41,
When b40 is "01", it means that the language is a caption. Other descriptions of the bit numbers b41 and b40 are reserved. An example of this reservation is a picture.

A specific code is described in bit numbers b39 to b32 and bit number b31 to bit number b24. In this case, when the type of the sub-picture stream is language or subtitle, ISO-639 is used. The code of the language determined by is described by a language symbol.
If the type of the sub-picture stream is not language, this area is reserved. Further, in the extension of the specific code described in the bit numbers b15 to b8, the type of the caption character is described. This bit number b
When “00h” is described in the bit number b8 to 15 from the sub-picture stream, it means that the character of the sub-picture stream is not a normal character or classification, and “01h” is described in the bit number b8 to the bit number b8. In this case, it means that the character is a large character, and the others are determined by the reservation of the system or the video provider.

The number of sub-pictures in the VTS menu (VTSM_S
PST_Ns) is basically one, but can be set to a number between 0 and 3. In this case, the attribute (VTSM_SPST_ATR) of the sub-picture of the VTS menu is described in the order of the stream number # 0, the stream number # 1, and the stream number # 2 of the sub-picture each having the description as shown in FIG. If the number of sub-picture streams (VTSM_SPST_Ns) of the VTS menu is smaller than 3, the attribute (VTSM_VST) of the sub-picture of the VTS menu corresponding to the sub-picture stream of the nonexistent VTS menu.
In “SPST_ATR),“ 0 ”is described in all bits. Number of VTS sub-video streams (VTS_SPS
T_Ns) can be set to a number between 0 and 32. In this case, the attribute of the VTS sub-picture (VTS_SPST_A
TR) are described in order from the stream number # 0 to the stream number # 31 of the sub-picture, each of which has a description as shown in FIG. Number of VTS sub-video streams (VTS_S
When “PST_Ns” is smaller than 32, “0” is described in all bits in the attribute (VTSM_SPST_ATR) of the VTS sub-picture corresponding to the non-existent VTS sub-picture stream.

The attribute (VTS_MU) of the multi-channel audio stream of the video title set (VTS)
_AST_ATR) describes attribute information from the multi-channel audio stream # 0 to the multi-channel audio stream # 7. Each multi-channel audio stream attribute (VTS_MU_AST_
In the (ATR), the content of the audio channel (such as karaoke or surround), the audio mixing method, and the like are described.

The VTS program chain information table (VTS_PGCIT) 100 shown in FIG.
The structure shown in FIG. This information table (VTS_PGCIT) 100 includes information (VTS_PC) related to the VTS program chain (VTS_PGC).
GCI) is described, and information (VTS_PGC) 100 of the information table (VTS_PGCIT) 100 relating to the VTS program chain (VTS_PGC) is described as the first item.
IT_I) 102 is provided. This information (VTS
_PGCIT_I) 102, the information table (VTS_PGCIT) 100 includes V in the number (# 1 to #n) of the VTS program chains (VTS_PGC) in the information table (VTS_PGCIT) 100.
VTS_PGCI search pointer (VTS_PGCI) for searching TS program chain (VTS_PGC)
T_SRP) 103, and finally each VTS program chain (VTS_PG) by the number (# 1 to #n) corresponding to the VTS program chain (VTS_PGC).
C) information (VTS_PGCI) 104 is provided.

Information (VTS_PGC) of VTS program chain information table (VTS_PGCIT) 100
IT_I) 102 has a VTS as shown in FIG.
Number of program chains (VTS_PGC) (VTS_PGC)
PGC_Ns) is described as the content, and the end address (VTS_PGCIT_EA) of this table information (VTS_PGCIT_I) 102 is described in this information table (V
TS_PGCIT) 100 is described by the relative number of bytes from the first byte.

As shown in FIG. 26, the VTS_PGCIT search pointer (VTS_PGCIT_SRP) 103 has an attribute (VTS_P) of the program chain (VTS_PGC) of the video title set (VTS) 72 as shown in FIG.
GC_CAT) and VTS_PGC information (VTS_PGCI) by the relative number of bytes from the first byte of the VTS_PGC information table (VTS_PGCIT) 100
Is described (VTS_PGCI_SA). Here, the VTS_PGC attribute (VTS_P
GC_CAT) has, for example, an entry program chain (entry PG
C) is described. Usually, an entry program chain (PGC) is described before a program chain (PGC) that is not an entry program chain (PGC).

The PGC information (V
The TS_PGCI) 104 describes four items as shown in FIG. This PGC information (VTS_PG
The CI) 104 first describes program chain general information (PGC_GI) 105 of essential items, followed by at least three items 106, 107 and 108 which are mandatory only when there is a video object. Have been. That is, as the three items, a program chain program map (PGC_PGMAP) 1
06, the cell reproduction information table (C_PBIT) 107 and the cell position information table (C_POSIT) 108
It is described in the GC information (VTS_PGCI) 104.

Program chain general information (PGC_G
I) 105 includes, as shown in FIG. 28, the category (PGCI_CAT) of the program chain (PGC), the contents (PGC_CNT) of the program chain (PGC), and the reproduction time (PGC_CNT) of the program chain (PGC).
PB_TIME) is described. The PGC category (PGCI_CAT) describes whether or not copying of the PGC is possible and whether or not the reproduction of the program in the PGC is continuous or random. The content of the PGC (PGC_CNT) describes the configuration content of the program chain, that is, the number of programs, the number of cells, and the like. PGC playback time (PGC_P
B_TIME) describes the total playback time of the program in the PGC. This playback time describes the playback time of the program when the program in the PGC is played continuously regardless of the playback procedure.

Also, program chain general information (PG
The C_GI) 105 describes PGC sub-picture stream control (PGC_SPST_CTL), PGC audio stream control (PGC_AST_CTL), and PGC sub-picture palette (PGC_SP_PLT). PGC sub-picture stream control (PGC_SPST_
CTL) describes the number of sub-images that can be used in PGC, and controls PGC audio stream control (PGC_AST).
_CTL) similarly describes the number of audio streams that can be used in PGC. The PGC sub-picture palette (PGC_SP_PLT) describes a set of a predetermined number of color palettes used in all sub-picture streams of this PGC.

Further, PGC general information (PGC_GI) 1
05 includes a PGC program map (PGC_PGMA).
P_SA) start address (PGC_PGMAP_
SA_SA), cell reproduction information table (C_PBIT)
A start address (C_PBIT_SA) 107 and a start address (C_POSIT_SA) of the cell position information table (C_POSIT) 108 are described. Both start addresses (C_PBIT_SA and C_POSIT_SA) have VTS_PGC information (VT
S_PGCI) in terms of the number of logical bytes relative to the first byte.

Program chain Program map (P
GC_PGMAP) 106, as shown in FIG.
4 is a map showing a configuration of a program in C. This map (PGC_PGMAP) 106 includes FIG. 29 and FIG.
As shown in 0, the entry cell number (ECELLN), which is the start cell number of the program, is described in ascending order of the cell numbers. Also, program numbers are assigned from 1 in the order of description of entry cell numbers. Therefore, the first entry cell number of this map (PGC_PGMAP) 106 must be # 1.

Cell reproduction information table (C_PBIT) 1
07 defines the PGC cell playback order. In the cell reproduction information table (C_PBIT) 107, cell reproduction information (C_PBIT) is continuously described as shown in FIG. Basically, the cells are reproduced in the order of their cell numbers. Cell playback information (C_PB
IT) includes reproduction information (P_P) as shown in FIG.
The cell category (C_CAT) is described as (BI). The cell category (C_CAT) includes a cell block mode indicating whether a cell is a cell in a cell block, or if the cell is a cell in a cell block, the first cell. Cell block type indicating whether there is no or an angle block, and S indicating whether resetting of the system time clock (STC) is necessary.
A TC discontinuity flag is described. Here, a cell block is defined as a set of cells at a specific angle. The angle can be changed by changing the cell block. That is, in the case of baseball as an example, a change from an angle block capturing a scene from the infield to an angle block capturing a scene from the infield corresponds to a change in the angle.

The cell category (C_CAT)
Indicates a cell playback mode indicating whether playback is to be performed continuously in a cell or to be stopped in units of video object units (VOBUs) in the cell, whether or not to stop after playback of the cell, or a still time. Cell navigation control is described.

As shown in FIG. 32, the reproduction information (P_PB) in the cell reproduction information table (C_PBIT) 107 is
I) includes a cell playback time (C_PBTM) describing the entire playback time of the PGC. When the angle cell block is in the PGC, the reproduction time of the angle cell number 1 indicates the reproduction time of the angle block. Further, a cell reproduction information table (C_PBIT) 10
7, the start address (C_FV) of the head video object unit (VOBU) 85 in the cell is represented by the number of logical sectors relative to the head logical sector of the video object unit (VOBU) 85 in which the cell is recorded.
OBU_SA) is described therein, and the start address (VOBU) 85 of the last video object unit (VOBU) 85 in the cell is represented by the number of logical sectors relative to the first logical sector of the video object unit (VOBU) 85 in which the cell is recorded. C_LVOBU_SA) is described.

Cell position information table (C_POSI) 1
08 specifies the identification number (VOB_ID) of the video object (VOB) of the cell and the identification number (C_ID) of the cell used in the PGC. In the cell position information table (C_POSI), the cell position information (C_POSI) corresponding to the cell number described in the cell reproduction information table (C_PBIT) 107 is the same as the cell reproduction information table (C_PBIT) as shown in FIG. Described in order. The cell position information (C_POSI) includes FIG.
As shown in FIG. 4, the video object unit (V
The identification number (C_VOB_IDN) and cell identification number (C_IDN) of the OBU 85 are described.

As described with reference to FIG.
Is a set of video object units (VOBU) 85, and video object units (VOBU) 8
5 is defined as a pack sequence starting from the navigation (NV) pack 86. Therefore, the start address (C_FVOBU_SA) of the first video object unit (VOBU) 85 in the cell 84 is the NV pack 8
6 represents the start address. As shown in FIG. 35, the NV pack 86 includes a pack header 110, a system header 111, and two packets as navigation data, namely, a reproduction (presentation) control information (PCI) packet 116 and a data search information (DS).
I) It has a structure consisting of a packet 117, the number of bytes as shown in FIG. 35 is assigned to each part, and one pack is defined as 2048 bytes corresponding to one logical sector.
The NV pack is arranged immediately before the video pack including the first data in the group of picture (GOP). Even when the object unit 85 does not include the video pack, the NV pack is arranged at the head of the object unit including the audio pack and / or the sub-picture pack. As described above, even when the object unit does not include the video pack, the reproduction time of the object unit is determined based on the unit in which the video is reproduced, as in the case where the object unit includes the video pack.

Here, the GOP is defined by the MPEG standard and is defined as a data string constituting a plurality of screens as described above. That is, a GOP corresponds to compressed data, and when this compressed data is expanded, image data of a plurality of frames from which a moving image can be reproduced is reproduced. Pack header 110 and system header 111
Is defined by the MPEG2 system layer, a pack header 110 stores information of a pack start code, a system clock reference (SCR), and a multiplexing rate, and a system header 111 describes a bit rate and a stream ID. ing. Packet headers 112 and 11 of PCI packet 116 and DSI packet 117
4, a packet start code, a packet length, and a stream ID are stored as defined in the MPEG2 system layer.

Other video, audio and sub-picture packs 8
As shown in FIG. 36, the pack headers 12, 90, and 91 are the same as those defined in the MPEG2 system layer.
0, a packet header 121 and a packet 122 in which corresponding data is stored.
048 bytes. Each of these packs
Aligned with a logical block boundary.

The PCI data (P
CI) 113 is presentation data, that is, navigation data for changing display contents in synchronization with the playback state of video data in the VOB unit (VOBU) 85. In other words, the PCI data (PCI) 113 includes, as shown in FIG. 37, PCI general information (PCI_GI) as information of the entire PCI and angle information (N) as each jump angle information at the time of angle change.
SMLS_ANGLI) is described. As shown in FIG. 38, the PCI general information (PCI_GI)
The address (NV_PCK_LBN) of the NV pack (NV_PCK) 86 in which the PCI 113 is recorded is described by the relative number of logical blocks from the logical sector of the VOBU 85 in which the CI 113 is recorded. Also, P
The CI general information (PCI_GI) describes a category (VOBU_CAT) of the VOBU 85, a start reproduction time (VOBU_S_PTM) and a reproduction end time (VOBU_EPTM) of the VOBU 85. Where V
Start PTS of OBU85 (VOBU_SPTS)
Indicates a playback start time (start presentation time) of video data in the VOBU 85 including the PCI 113. This playback start time is determined by the VOBU
85 is the first playback start time. Normally, the first picture is an I picture (In
tra-Picture). VOBU8
5, the end PTS (VOBU_EPTS) is the PCI
The reproduction end time (end presentation time) of the VOBU 85 including the 113 is shown.

D in the DSI packet 117 shown in FIG.
The SI data (DSI) 115 is a VOB unit (VO
BU) 85 is navigation data for executing the search. The DSI data (DSI) 115 includes FIG.
, DSI general information (DSI_GI), seamless reproduction information (SML_PBI), angle information (SM
L_AGLI), navigation pack address information (NV_PCK_ADI) and synchronous reproduction information (SYNC)
I) is described.

The DSI general information (DSI_GI) describes information on the entire DSI data 115. That is, as shown in FIG. 40, the DSI general information (DSI_G
In I), a system time reference value (NV_PCK_SCR) of the NV pack 86 is described. This system time reference value (NV_PCK_SCR) is shown in FIG.
Are stored in a system time clock (STC) incorporated in each section shown in FIG. 1, and the video, audio and sub-picture packs are decoded by the video, audio and sub-picture decoder sections 58, 60 and 62 based on this STC, The sound is reproduced by the monitor unit 6 and the speaker unit 8. DSI general information (DSI_GI) includes DSI11
5 is recorded in the NV pack (NV_PC) in which the DSI 115 is recorded by the relative logical sector number (RLSN) from the first logical sector of the VOB set (VOBS) 82 in which 5 is recorded.
K) Start address of 86 (NV_PCK_LBN)
Is described in terms of the number of logical sectors (RLSN) relative to the first logical sector of the VOB unit (VOBU).
VOB unit (VOBU) 85 in which 15 is recorded
The address (VOBU_EA) of the last pack inside is described.

Further, in the DSI general information (DSI_GI), the VOB unit (V
A V pack (V_PC) in which the last address of the first I picture in this VOBU is recorded by the relative number of logical sectors (RLSN) from the first logical sector of the OBU)
K) VOBU 8 in which the end address (VOBU_IP_EA) of 88 is described and the DSI 115 is recorded
3 (VOBU_IP_IDN) and the corresponding DS
The identification number of the cell in which I115 is recorded (VOBU_
C_IDN).

The navigation pack address information of the DSI describes addresses of a predetermined number of navigation packs. With reference to this address, the video is fast forwarded or the like. The synchronization information (SYNCI) includes:
The address information of the sub-picture and audio data to be reproduced in synchronization with the reproduction start time of the video data of the VOB unit (VOBU) including the DSI 115 is described. That is, as shown in FIG. 41, the target audio pack (A) is determined by the relative number of logical sectors (RLSN) from the NV pack (NV_PCK) 86 in which the DSI 115 is recorded.
_PCK) 91 start address (A_SYNCA)
Is described. Multiple audio streams (up to 8)
In some cases, the synchronization information (SYNCI) is described by that number. The synchronization information (SYNCI) includes a VO including the target audio pack (SP_PCK) 91.
NV pack (NV_PC) of B unit (VOBU) 85
K) 86 address (SP_SYNCA) is DSI11
5 is described by the relative number of logical sectors (RLSN) from the NV pack (NV_PCK) 86 in which 5 is recorded. When there are a plurality of sub-video streams (up to 32), the synchronization information (SYNCI) is described by the number.

Next, the video data attribute (VMG
M_V_ATR, VTSM_V_ATR, VTS_V_
ATR), audio data attribute (VMGM_AST_)
ATR, VTSM_AST_ATR, VTS_AST_
ATR), sub-picture data attribute (VMGM_SPST_A)
TR, VTSM_SPST_ATR, VTS_SPST
_AT), a circuit configuration in which the video decoder unit 58, the audio decoder unit 60, the sub-picture decoder unit 62, and the D / A & playback processing unit 64 can be appropriately set will be described below.

As shown in FIG. 42, the video decoder 58 comprises a register 58A, a selector 58B, an MPEG1 decoder 58C, and an MPEG2 decoder 58D. In the circuit shown in FIG. 42, video data attributes (VMGM_V_ATR, VGM) supplied from the system CPU 50 through the system processor 54 are provided.
A control signal corresponding to (TSM_V_ATR, VTS_V_ATR) is held in the register 58A, and its output is output to the selector 58B. The selector 58B converts the video data supplied from the system processor unit 54 into an MPEG1 decoder 58 according to the output from the register 58A.
C, or selectively outputs to the MPEG2 decoder 58D. When the MPEG1 decoder 58C is selected, the video data from the selector 58B is
The video data is supplied to the decoder 58C and is decoded by the MPEG1 encoding method. MPEG2 decoder 5
When 8D is selected, the video data from the selector 58B is supplied to the MPEG2 decoder 58D, and the video data is decoded by the MPEG2 decoder 58D using the MPEG2 encoding method. A decoder output from the MPEG1 decoder 58C or the MPEG2 decoder 58D is output as a decoder output of the video decoder unit 58 to a video reproduction processing unit 201 described later in the D / A & reproduction processing unit 64.

As shown in FIG. 43, the audio decoder section 60 includes a register 60A, a selector 60B, an MPEG1
It comprises a decoder 60C, an AC3 decoder 60D and a PCM decoder 60E. In the circuit shown in FIG. 43, audio data attributes (VMGM_AST_ATR, VTSM_AST_AT) supplied from the system CPU unit 50 via the system processor unit 54
R, VTS_AST_ATR) is held by the register 60A, and its output is
0B is output. The selector 60B converts the audio data supplied from the system processor unit 54 into an MPEG1 decoder 60C according to the output from the register 60A.
AC3 decoder 60D or PCM decoder 60E
Is output selectively. When the MPEG1 decoder 60C is selected, the audio data from the selector 60B is transmitted to the MPEG1 decoder 60C by the MPEG1 decoder 60C.
Is decoded by the following encoding method. AC3 decoder 60D
Is selected, the audio data from the selector 60B is decoded by the AC3 decoder 60D using the AC3 encoding method. When the PCM decoder 60E is selected, the digital audio data from the selector 60B is decoded by the PCM decoder 60E into analog audio data. MPEG1
Decoder 60C, AC3 decoder 60D, or PC
A decoder output from the M decoder 60E is output as a decoder output of the audio decoder unit 60 to an audio reproduction processing unit 202 described later in the D / A & reproduction processing unit 64.

As shown in FIG. 44, the sub-picture decoder 62 includes a register 62A, a selector 62B, a bitmap decoder 62C, and a run-length decoder 62D. In the circuit shown in FIG. 44, the sub-picture data attribute (VMGM_SPST_
ATR, VTSM_SPST_ATR, VTS_SPS
The control signal corresponding to (T_ATR) is held by the register 62A, and its output is output to the selector 62B. The selector 62B selectively outputs the sub-picture data supplied from the system processor unit 54 to the bitmap decoder 62C or the run-length decoder 62D according to the output from the register 62A. When the bitmap decoder 62C is selected, the selector 62
When the sub-picture data from the selector 62B is decoded by the bitmap decoder 62C by the bitmap encoding method and the run-length decoder 62D is selected, the sub-picture data from the selector 62B is decoded by the run-length decoder 6C.
Decoding is performed by 2D using a run-length encoding method.

As shown in FIG. 1, the D / A & playback processing section 64 has a video playback processing section 201, an audio playback processing section 202, an audio mixing section 203, and a sub-picture playback processing section 207. The video playback processing unit 201
As shown in FIG. 45, it is configured by a frame rate processing unit 204, an aspect processing unit 205, and a pan scan processing unit 206.

The frame rate processing unit 204 includes a register 204A, a selector 204B, and a NT
It comprises an SC unit 204C and a PAL unit 204D. In the circuit shown in FIG.
0 to the video data attributes (VMGM_V_ATR, VTSM_V) supplied via the system processor unit 54.
_ATR, VTS_V_ATR) is held in the register 204A, and its output is
4B. The selector 204B stores the video data supplied from the video decoder unit 58 in the register 204B.
Depending on the output from A, the NTSC unit 204C or
It selectively outputs to the PAL unit 204D. NTSC section 20
When 4C is selected, the video data from the selector 204B is converted into the NTSC format by the NTSC unit 204C. That is, the NTSC unit 204C outputs video data having a frame rate in which one frame is drawn with a horizontal scanning frequency of 60 Hz and 525 scanning lines. When the PAL unit 204D is selected, the video data from the selector 204B is converted into a PAL format by the PAL unit 204D. That is, the PAL unit 204D outputs video data having a frame rate in which one frame is drawn at a frequency of 50 Hz with 625 scanning lines. NTSC unit 204C or PAL unit 2
04D, that is, the frame rate processing unit 204
Is output to the aspect processing unit 205.

[0114] The aspect processing unit 205
5A, selector 205B, 3/4 aspect processing unit 20
5C, 9/16 aspect processing unit 205D. The video data attribute (VMG) supplied from the system CPU unit 50 via the system processor unit 54
M_V_ATR, VTSM_V_ATR, VTS_V_
ATR) is held by the register 205A, and its output is output to the selector 205B. The selector 205B is connected to the frame rate processing unit 204
Is selectively output to the 3/4 aspect processing unit 205C or the 9/16 aspect processing unit 205D according to the output from the register 204A. When the 3/4 aspect processing unit 205C is selected, the video data from the frame rate processing unit 204 is converted into video data having an aspect ratio of 3/4 by the 3/4 aspect processing unit 205C. 9/1
When the 6 aspect processing unit 205D is selected, the video data from the frame rate processing unit 204 is 9/1
The data is converted into video data having an aspect ratio of 9/16 by the 6 aspect processing unit 205D. Output from the 3/4 aspect processing unit 205C or the 9/16 aspect processing unit 205D, that is, the aspect processing unit 20
The output of No. 5 is output to the pan scan processing unit 206.

As shown in FIG. 45, the pan scan processing unit 206 includes a register 206A, a selector 206B, a pan scan letterbox through unit 206C, and a pan scan letterbox processing unit 206D. The video data attribute (VMG) supplied from the system CPU unit 50 via the system processor unit 54
M_V_ATR, VTSM_V_ATR, VTS_V_
ATR) is stored in the register 206A, and its output is output to the selector 206B. Here, the video data attributes (VMGM_V_ATR, VTS
M_V_ATR, VTS_V_ATR)
When displaying video data having a 16 aspect ratio on the display monitor 8 of a TV system having a 3/4 aspect ratio, the system CPU 50 determines whether pan scanning or letter box is permitted and determines the display mode. Then, the decision is output to the selector 206B. The selector 206B is connected to the aspect processing unit 205
Is selectively output to the pan scan letterbox through unit 206C or the pan scan letterbox processing unit 206D according to the output from the register 206A. When the pan scan letter box through unit 206C is selected, the video data from the aspect processing unit 205 includes
Normal video data is output without performing pan scan and letter box processing. When the pan scan / letterbox processing unit 206D is selected, panscan or letterbox processing is performed on the video data from the aspect processing unit 205 in the panscan / letterbox processing unit 206D. Pan scan letterbox through section 206C or
Output from pan scan letterbox processing section 206D, that is, panscan letterbox processing section 206D
Is output to the monitor unit 6 via a video signal synthesizing circuit that synthesizes a sub-picture signal and a video signal (not shown). Therefore, as described with reference to FIG. 9, the video data suitable for any of the normal, pan scan, and letterbox display modes on the display monitor 50 is output from the processing unit 206.

As shown in FIG. 46, the audio reproduction processing section 202 includes a register 202A, a selector 202B, a stereo output section 202C, a monaural output section 202D, and a surround output section 202E. In the circuit shown in FIG. 46, audio data attributes (VMGM_AST_ATR, VTSM_AST) supplied from the system CPU unit 50 via the system processor unit 54
_ATR, VTS_AST_ATR) are stored in the register 202A, and the output is output to the selector 202B. The selector 202B outputs the audio data supplied from the audio decoder unit 60 to the stereo output unit 2 according to the output from the register 202A.
02C, a monaural output unit 202D, or a surround output unit 202E. Stereo output unit 2
When 02C is selected, the audio data from the selector 202B is converted to stereo data. When the monaural output unit 202D is selected, the audio data from the selector 202B is converted to monaural data. When the surround output unit 202E is selected, the audio data from the selector 202B is converted to surround data. Stereo output unit 20
The output from the 2C, monaural output unit 202D, or surround output unit 202E, that is, the output from the audio reproduction processing unit 202, is directly output to the speaker unit 8. When the audio data is multi-channel audio data, the output from the surround output unit 202E is output from the speaker unit via the audio mixing unit 203.

The audio mixing unit 203 is provided in FIG.
, The registers 203A, 203B,
Selector 203C, first stream processing unit 203D, second stream processing unit 203E, mixing processing unit 203
F. In the circuit shown in FIG. 47, the registers 203A and 203B have the system CPU
Multi-channel audio stream attribute (VTS_MU_AST_ATR) described in VTSI_MAT supplied from unit 50 via system processor unit 54
, The output of the register 203A is output to the selector 203C, and the output of the register 203B is output to the mixing processing unit 203F. The selector 203C selectively outputs the audio data supplied from the audio reproduction processing unit 202 to the first stream processing unit 203D or the second stream processing unit 203E according to the output from the register 203A. First
When the stream processing unit 203D is selected, the audio data from the selector 203C is converted into data of the first stream by the first stream processing unit 203D. When the second stream processing unit 203E is selected, the audio data from the selector 203C is converted into data of the second stream by the second stream processing unit 203E. The output from the first stream processing unit 203D or the second stream processing unit 203E is output to the mixing processing unit 203F. The mixing processing unit 203F executes a mixing process in accordance with the output from the register 203A, and outputs the mixed data to the speaker 8 or the like as an output from the audio mixing unit 203.

Next, referring again to FIG. 1, FIGS.
The operation of reproducing movie data from the optical disc 10 having the logical format shown in FIG. In FIG. 1, solid arrows between blocks indicate data buses.
Dashed arrows indicate control buses.

In the optical disk device shown in FIG. 1, when the power is turned on and the optical disk 10 is loaded,
System ROM and RAM 52 to system CPU
The unit 50 reads the initial operation program and operates the disk drive unit 30. Therefore, the disk drive unit 30 starts a read operation from the lead-in area 27, and reads a volume and a file structure area 70 following the lead-in area 27, the volume and the file structure of which are defined in accordance with ISO-9660 or the like. . That is, the system CPU unit 50 gives a read command to the disk drive unit 30 to read the volume and file structure area 70 recorded at a predetermined position of the disk 10 set in the disk drive unit 30, The contents of the structure area 70 are read and temporarily stored in the data RAM unit 56 via the system processor unit 54. The system CPU unit 50 includes a data RAM unit 56
Extracting information such as the recording position and recording volume size of each file and other management information as information necessary for management through the path table and the directory record stored in the
The data is transferred to a predetermined location in the system ROM & RAM unit 52 and stored.

Next, the system CPU unit 50 acquires the video manager 71 composed of a plurality of files starting from the file number 0 with reference to the information on the recording position and the recording capacity of each file from the system ROM & RAM unit 52. That is, the system CPU unit 50 includes a system ROM
A read command is given to the disk drive unit 30 with reference to the information on the recording position and the recording capacity of each file acquired from the RAM unit 52, and the position and the position of a plurality of files constituting the video manager 71 existing on the root directory are determined. The size is acquired, the video manager 71 is read, and stored in the data RAM unit 56 via the system processor unit 54.

A video manager information management table (VMGI_MAT) 78 which is the first table of the video manager 71 is searched. By this search, a video object set (VMGM_VOBS) 7 for a video manager menu (VMGM)
6 (VMGM_VOBS_SA) is obtained and the video object set (VMGM_VOB) is acquired.
S) 76 is reproduced. Regarding the reproduction of the menu video object set (VMGM_VOBS) 76, the video object set (VTSM_VOBS) for the title in the video title set (VTS) is used.
Therefore, the reproduction procedure is omitted. When the language is set in the video object set (VMGM_VOBS) 76, or when there is no video manager menu (VMGM), the video manager information management table (VMGI_MAT) is searched and the title set search pointer table (TT_SRPT)
A 79 start address, (TT_SRPT_SA) is searched. Here, when reproducing the video manager menu, the system CPU unit 50 transmits the information management table (VMGI_) of the video manager (VMGI) 75.
MAT) 78, for a video menu described in
The number of audio and sub-picture streams and the respective attribute information are obtained, and based on the attribute information, each video decoder unit 58, audio decoder unit 60 and sub-picture decoder unit 62 send parameters for video manager menu playback. Is set.

By this search, the title set search pointer table (TT_SRPT) 79 is transferred to a predetermined location in the system ROM & RAM unit 52 and stored. Next, the system CPU unit 50 obtains the final address of the title search pointer table (TT_SRPT) 79 from the title search pointer table information (TSPTI) 92 and obtains the title search pointer corresponding to the input number from the key operation / display unit 4. (TT_SR
P) 93, the video title set number (VTSN) corresponding to the input number, and the program chain number (PGC)
N) and the start address of the video title set (V
TS_SA) is obtained. If there is only one title set, one title search pointer (TT_SR) regardless of the presence or absence of the input number from the key operation / display unit 4
P) 93 is searched to obtain the start address (VTS_SA) of the title set. The system CPU unit 50 acquires the target title set from the start address (VTS_SA) of the title set.

Next, from the start address (VTS_SA) of the video title set 72 shown in FIG. 15, video title set information (VTSI) 94 of the title set is obtained as shown in FIG. The video title set information management table (VTSI_MAT) 98 of the video title set information (VTSI) 94 shown in FIG.
Video title set information management table (VT) shown in FIG.
SI_MAT) 98 end address (VTI_MAT_
EA) is obtained. Also, the number of streams of audio and sub-picture data (VTS_AST_Ns, VTS_S
PST_Ns) and attribute information (VTS_V_ATR, VTS_A_AT) of video, audio, and sub-picture data
R, VTS_SPST_ATR), each unit of the playback apparatus shown in FIG. 1 is set according to its attribute. Regarding the setting of each part of the playback device according to this attribute information,
This will be described in more detail later.

When the menu (VTSM) for the video title set (VTS) has a simple configuration, the video title set information management table (VTSI_MAT) 98 shown in FIG. Video object set (VTSM_
VOB) 95 start address (VTSM_VOB_
SA) is acquired and its video object set (V
TSM_VOB) 95 displays a menu of a video title set. Referring to this menu, a video object set (VTT_VOBS) 96 for a title (VTST) in a title set (VTS) is simply selected without particularly selecting a program chain (PGC).
Is reproduced, the video object set 96 is reproduced from the start address (VTSTT_VOB_SA) shown in FIG.

When a program chain (PGC) is designated by the key operation / display section 4, a target program chain is searched for in the following procedure. The search of the program chain is not limited to the program chain for the title in the video title set, and the same procedure is applied to the search of the program chain for the menu even for a relatively complicated menu in which the menu is composed of the program chain. Is adopted. The management table (V) of the video title set information (VTSI) 94
The start address of the program chain information table (VTS_PGCIT) 100 in the video title set (VTS) shown in FIG. 22 described in FIG.
102 is read. This information (VTS_PGCIT
_I) 102, the number of program chains (VTS_PGC_Ns) and the end address (VTS_PGCIT_EA) of the table 100 shown in FIG.

When a program chain number is designated on key operation / display section 4, a VTS_PGCIT search pointer (VTS_PGC) shown in FIG.
IT_SRP) 103 to its program chain category and its search pointer (VTS) shown in FIG.
_PGCIT_SRP) VTS_PG corresponding to 103
The start address of the C information 104 is obtained. By this start address (VTS_PGCI_SA), the program chain general information (PGC_G) shown in FIG.
I) is read. According to the general information (PGC_GI), the program chain (PGC) category and reproduction time (PGC_CAT, PGC_PB_TIME)
Are obtained, and the start addresses (C_PBIT_SA, C_POSIT_SA) of the cell reproduction information table (C_PBIT) and the cell position information table (C_POSIT) 108 described in the general information (PGC_GI) are obtained. Start address (C_PBIT_SA)
33 as video position identifiers (C_POSI) as shown in FIG. 34 as cell position information (C_POSI) shown in FIG.
VOB_IDN) and a cell identification number (C_IDN) are obtained.

The start address (C_POSIT)
_SA) to the cell reproduction information (C_PBI) shown in FIG.
FIG. 3 described in the reproduction information (C_PBI).
2, the start address (C_FVOBU_SA) of the first VOBU 85 and the start address (C_LVOBU_SA) of the last VOBU are obtained, and the target cell is searched. The order of cell playback is
The PGC program map (PGC_P shown in FIG. 27)
The reproduction cells 84 are determined one after another with reference to the program map shown in FIG. The data cells 84 of the program chain determined in this way are successively read from the video object 144 and input to the data RAM unit 56 via the system processor unit 54. The data cell 84 is supplied to the video decoder unit 58, the audio decoder unit 60, and the sub-picture decoder unit 62 based on the reproduction time information, and is decoded.
The signal is converted by the reproduction processing unit 64 and the image is reproduced on the monitor unit 6 and the sound is reproduced from the speaker units 8 and 9.

Next, with reference to the flowchart shown in FIG. 48, the acquisition of the video data attribute information (VTS_V_ATR) in the optical disk reproducing apparatus and the setting processing of the video decoder and the video reproduction processing unit 201 according to the attribute information (VTS_V_ATR) will be described. I will explain.
When the setting process is started, the system CPU 50 controls the disk drive 30 as shown in step 10 to control the video title set information management table (VTS).
I_MAT) 98 is read from the optical disk 10 and temporarily stored in the data RAM unit 56. As shown in step S11, the system CPU unit 50 acquires the video data attribute (VTS_V_ATR) recorded in the video title set information management table (VTSI_MAT) 98 stored in the data RAM unit 56. System CPU 50
Determines whether the video compression mode described in the video data attribute (VTS_V_ATR) acquired in step S12 complies with MPEG1 or MPEG2, and outputs a control signal according to the determination result to the video decoder. It outputs to the register 58A of the section 58. Thereby, the selector 58B is switched according to the control signal supplied to the register 58A, and the video compression mode 131 is set to M
If it complies with PEG1, the system processor 5
4 from the MPE via selector 58B.
G1 decoder 58C is supplied to the video compression mode 13
When 1 conforms to MPEG2, video data from the system processor unit 54 is supplied to an MPEG2 decoder 58D via a selector 58B. System CP
The U unit 50 determines whether the display aspect ratio described in the acquired video data attribute 123 is 3/4 or 9/16 as shown in step S13, and a control signal corresponding to the determination result. To the register 205A in the aspect processing unit 205 of the video reproduction processing unit 201 in the D / A & reproduction processing unit 64. Thereby, the register 2
Selector 205B in accordance with the control signal supplied to
Is switched, and when the display aspect ratio is 3/4, the video data from the frame rate processing unit 204 is supplied to the 3/4 aspect processing unit 205C via the selector 205B, and when the display aspect ratio is 9/16, The video data from the frame rate processing unit 204 is
The data is supplied to the 9/16 aspect processing unit 205D via 5B.

Further, the system CPU unit 50 determines whether the frame rate described in the acquired video data attribute is NTSC or PAL as shown in step S14, and outputs a control signal corresponding to the determination result. D / A &
The data is output to the register 204A in the frame rate processing unit 204 of the video reproduction processing unit 201 in the reproduction processing unit 64. As a result, the selector 204B is switched according to the control signal supplied to the register 204A, and when the frame rate is NTSC, the video data from the video decoder 58 is transmitted to the NTSC 20 via the selector 204B.
4C, and when the frame rate is PAL, the video data from the video decoder
The signal is supplied to the PAL unit 204D via B. Further, the system CPU unit 50 determines whether or not the pan scan 134 described in the video data attribute 123 acquired as shown in step S15 is present, and outputs a control signal according to the determination result to the D / A & playback processing unit. 64 in the pan scan processing unit 206 of the video reproduction processing unit 201
06A. Thereby, the selector 206B is switched according to the control signal supplied to the register 206A, and when there is a pan scan or a letter box,
The video data from the aspect processing unit 205 is supplied to a pan-scan / letter-box processing unit 206D via a selector 206B. When there is no pan-scan or letterbox, the video data from the aspect processing unit 205 is supplied via a selector 206B. This is supplied to the pan scan through unit 206C.

By the above series of processing, the video decoder unit 58 and the video reproduction processing unit 201 are optimally set for the video data of the title set to be reproduced. In the flow of FIG. 48, when the video decoder 58 and the video reproduction processing unit 201 are set according to the video data attribute information (VMGM_V_ATR), the video title set information management table (VTS
The video management information management table (VMGI_MAT) 78 is read instead of the I_MAT) 98, and the video data attribute information (VMGM_V_ATR) is obtained. 48, the video decoder 58 according to the video data attribute information (VTSM_V_ATR).
And when the video playback processing unit 201 is set,
Like the video data attribute information (VTS_V_ATR), the video title set information management table (VTSI_M)
AT) 98 to the video data attribute information (VTSM_V_
ATR) is obtained.

Next, referring to the flowchart shown in FIG. 49, the acquisition of the audio data attribute (VTS_AST_ATR) in the optical disk reproducing apparatus and the setting processing of the video decoder and the video reproduction processing unit 201 according to the attribute information (VTS_AST_ATR) will be described. Will be explained. When the setting process is started, as shown in step 20, the system CPU 50
To read the video title set information management table (VTSI_MAT) 98 from the optical disk 10 and temporarily store it in the data RAM unit 56. Step 21
The video title set information management table (VTSI_MAT) 9 stored in the data RAM unit 56 as shown in FIG.
8 The number of recorded audio streams is transferred to the system CPU.
The unit 50 acquires the information. When an audio stream number selectable by the user is specified by the key operation and the operation of the processing unit 4 as shown in step 32, the video title set information management table (VTSI_MAT) stored in the data RAM unit 56 as shown in step 22 The system CPU unit 50 acquires an audio attribute (VTS_AST_ATR) corresponding to the stream number designated by the user from the 98 audio data attribute groups (VTS_AST_ATR). The system CPU unit 50 acquires the audio data attribute (VTS_AS)
T_ATR) is M.
It discriminates which of PEG1 and linear PCM is compliant, and outputs a control signal corresponding to the discrimination result to the register 60A of the audio decoder unit 60.

As a result, the selector 60B is switched according to the control signal supplied to the register 60A, and when the audio encoding mode conforms to MPEG1, audio data from the system processor unit 54 is transmitted via the selector 60B. When the audio data is supplied to the MPEG1 decoder 60C and the audio encoding mode conforms to AC3, the audio data from the system processor unit 54 is supplied to the AC3 decoder 60D via the selector 60B, and the video encoding mode conforms to digital PCM. In this case, the audio data from the system processor unit 54 is supplied to the PCM decoder 60 via the selector 60B.
E.

Also, the system CPU unit 50 acquires the audio data attribute (VT
It determines whether the audio mode 152 described in (S_AST_ATR) is stereo, monaural, or surround, and outputs a control signal according to this determination result to the register 202A in the audio reproduction processing unit 202. Thereby, the selector 202B is switched according to the control signal supplied to the register 202A, and when the audio mode 152 is stereo, the audio data from the audio decoder unit 60 is supplied to the stereo output unit 202C via the selector 202B. When the audio mode 152 is monaural, the audio decoder unit 60
Is supplied to the monaural output unit 202D via the selector 202B, and is output to the audio mode 1
In the case where 52 is surround, the audio data from the audio decoder unit 60 is supplied to the surround output unit 202E via the selector 202B.

Next, the system CPU unit 50 sets the acquired audio data attribute 125 as shown in step 25.
Whether the mixing mode described in is a mixing impossible or a mixable master stream,
It determines whether the stream is a slave stream that can be mixed, and outputs a control signal corresponding to the determination result to the registers 203A and 203B of the audio mixing unit 203. As a result, the selector 203C is switched in accordance with the control signal supplied to the register 203A.
In the case of a master stream that can be mixed as shown in FIG. 5, the stream is supplied to the first stream processing unit 203D as a first stream as shown in step 26, and in the case of a slave stream that can be mixed as shown in step 27, As shown in step 28, the stream is supplied to the second stream processing unit 203E as a second stream, and in the case of an independent stream that cannot be mixed,
It is supplied to the stream processing unit 203D. Further, the processing of the mixing processing unit 203F is switched according to the control signal supplied to the register 203B, and if mixing is possible, the processing of the first stream of the first stream processing unit 203D and the second stream of the second stream processing unit 203E is performed. After being subjected to mixing processing and output to the speaker unit 8, if mixing is not possible, the first stream processing unit 203 </ b> D
Is output to the speaker unit 8 only.

Also, the system CPU 50 obtains the audio data attribute 125
It is determined whether or not the audio type 153 described in the language is a language. If the result of the determination is a language, a language code is obtained from the language code 156, and the system ROM
From the language code table stored in advance in the & RAM unit 52,
The corresponding language name is determined and indicated by the monitor unit 6 or the like as shown in step 31.

Conversely, when the user specifies a language code, an audio stream having a target language code can be specified from the number of audio streams 124 and the audio data attribute 125.

If an instruction to switch the audio stream number is issued during a data reproduction due to a user event or the like (S32), the acquisition setting of the audio data attribute is performed by the processing from S22 to S31.

By the above series of processing, the audio decoder section 60, the audio reproduction processing section 202, and the audio mixing section 203 are optimally set for the video data of the title set to be reproduced.
In the flow of FIG. 49, the audio data attribute (VM
When the video decoder 58 and the video playback processing unit 201 are set according to GM_AST_ATR, the video title set information management table (VTSI_MA)
T) 98 instead of the video management information management table (VMG
(I_MAT) 78 is read to obtain the audio data attribute (VMGM_AST_ATR). In the flow of FIG. 48, the audio data attribute (VTS
M_AST_ATR) according to the audio decoder 6
0 and the audio reproduction processing unit 202 are set, the audio data attribute (VTSM_AST_AT)
An audio data attribute (VTSM_AST_ATR) is obtained from the video title set information management table (VTSI_MAT) 98 as in the case of R).

FIG. 48 is a flowchart showing the acquisition of sub-picture attribute information (VTS_AST_ATR) in the optical disc reproducing apparatus and the setting processing of the sub-picture decoder 62 and the video reproduction processing unit 201 according to the attribute information (VTS_SPST_ATR). This will be described with reference to FIG. As shown in step 40, the system CPU 50
Controls the disk drive unit 30 to read the video title set information management table (VTSI_MAT) 98 from the optical disk 10 and temporarily read the data RAM unit 56
To store. As shown in step 41, the number of sub-picture streams (VTS_SPST_Ns) recorded in the video title set information management table (VTSI_MAT) stored in the data RAM unit 56 is stored in the system CPU unit 50.
Get. When the user selects a sub-picture stream number that can be selected by the key operation and the operation of the processing unit 4 as shown in step 46, the video title set information management table (VTSI_MAT) stored in the data RAM unit 56 as shown in step 42 ) Corresponding to the user-specified channel number from the sub-video data attribute (VTS_AST_ATR) recorded in (VTS_AST_ATR)
Is acquired by the system CPU unit 50. The system CPU unit 50 determines whether the sub-picture compression mode described in the sub-picture data attribute (VTS_AST_ATR) acquired as shown in step 43 is Raw (corresponding to a bitmap), run-length, or other, The control signal corresponding to the result of the determination is stored in the register 62 of the
Output to A. As a result, the selector 62B is switched according to the control signal supplied to the register 62A, and when the sub-picture compression mode corresponds to the bitmap, the sub-picture data from the system processor 54 is transmitted to the selector 6B.
2B, and supplied to the bitmap decoder 62C via
If the sub-picture compression mode supports run length,
The sub-picture data from the system processor unit 54 is supplied to the run-length decoder 62D via the selector 62B.

Further, the system CPU 50 determines whether or not the sub-picture type 172 described in the acquired sub-picture data attribute 127 is a language, as shown in step 44, and the result of this determination is in the language. In some cases, as shown in step 45, a language code is obtained from the language code, a corresponding language name is determined from a language code table stored in advance in the system ROM & RAM unit 52, and an indication is made by the monitor unit 6 or the like. .

Here, when a language code is designated by the user, a sub-picture stream having a target language code can be specified from the number of sub-picture streams and the sub-picture data attribute 127. Further, as shown in step 46, when there is an instruction to switch the sub-picture stream number due to a user event or the like during data reproduction, the acquisition setting of the sub-picture data attribute is executed by the processing of steps S42 to S45.

By the above series of processing, the sub-picture decoder 62 and the sub-picture reproduction processor 207 are optimally set for the video data of the title set to be reproduced. In the flow of FIG. 49, the sub-video attribute (V
When the sub-picture decoder unit 62 and the sub-picture reproduction processing unit 207 are set according to MGM_SPST_ATR, the video title set information management table (VTSI)
_MAT) 98 instead of the video management information management table (VMGI_MAT) 78 to acquire the sub-picture attribute (VMGM_SPST_ATR). Also,
In the flow of FIG. 48, the sub-video attribute (VTSM_SP
When the audio decoder unit 60 and the audio reproduction processing unit 202 are set according to (ST_ATR),
Similar to the sub-video attribute attribute (VTS_SPST_ATR), the video title set information management table (VTSI_M)
AT) 98 to the sub-video attribute attribute (VTSM_SPST_
ATR) is obtained.

Next, referring to FIGS. 51 to 53, the video data in the logical format shown in FIGS. 4 to 41 and the method of recording the video data on the optical disk 10 for reproducing the video data and the method of recording are applied. The recording system will be described.

FIG. 51 shows an encoder system for generating a video file 88 of a title set 84 in which video data is encoded. In the system shown in FIG. 51, for example, a video tape recorder (VTR) 201, an audio tape recorder (ATR) 202, and a sub-picture reproducer (Subpicture, so
urce) 203 is employed. These are the main video data under the control of the system controller (Sys, con) 205,
It generates audio data and sub-picture data, which are supplied to a video encoder (VENC) 206, audio encoder (AENC) 207 and sub-picture encoder (SPENC) 208, respectively, and likewise under the control of a system controller (Sys con) 205. The main video data, the audio data, and the sub video data (Comp V) are A / D converted by these encoders 206, 207, and 208 and encoded by the respective compression methods.
(ideo, Comp Audio, CompSu-pict) are stored in the memories 210, 211, and 212.

The main video data, audio data and sub video data (Comp Video, CompAudio, Comp Su
b-pict) is the system controller (Sys con) 20
5 to a file formatter (FFMT) 214, which is converted into the file structure of the video data of this system as described above, and the management information such as setting conditions and attributes of each data is stored as a file in the system controller (Sys con). 205 stores it in the memory 216.

A standard flow of an encoding process in the system controller (Sys con) 205 for creating a file from video data will be described below.

The main video data and audio data are encoded according to the flow shown in FIG. 52, and the encoded main video data and audio data (Comp Video, Comp Aud
io) data is created. That is, when the encoding process is started, parameters necessary for encoding the main video data and the audio data are set as shown in step 70 of FIG. Some of the set parameters are stored in the system controller (Sys con) 205.
And file formatter (FFM
T) 214. As shown in step S271, the main video data is pre-encoded using the parameters, and the optimal code amount distribution is calculated. Step S2
As shown at 72, the main video is encoded based on the code amount distribution obtained by the pre-encoding. At this time, the encoding of the audio data is performed at the same time. If necessary, as shown in step S273, partial re-encoding of the main video data is executed, and the main video data of the re-encoded portion is replaced. Through this series of steps, the main video data and audio data are encoded. Steps S274 and S274
As shown at 275, the sub-picture data is encoded to create encoded sub-picture data (Comp Sub-pict).
That is, parameters necessary for encoding the sub-picture data are set in the same manner. Some of the parameters set as shown in step S274 are stored in the system controller (Sys con) 205 and used by the file formatter (FFMT) 214. Sub-picture data is encoded based on these parameters. By this processing, the sub-picture data is encoded.

According to the flow shown in FIG. 53, the encoded main video data, audio data, and sub video data (Com Video, Comp Audio, Comp Sub-pict) are combined and described with reference to FIGS. 4 and 21. It is converted into such a title set structure of video data. That is, as shown in step S276, the cell as the minimum unit of the video data is set, and the cell reproduction information (C_
PBI) is created. Next, as shown in step S277, the configuration of the cells constituting the program chain, the main video, the sub-video, the audio attributes, and the like are set (for some of these attribute information, information obtained at the time of each data encoding is used. 21), a video title set information management table information (VTSI_MAT) including information on a program chain and a video title set program chain table (VTS_PG) as shown in FIG.
CIT) 100 is created. At this time, a video title set direct access pointer table (VTS_DAPT) is also created as needed. Encoded main video data, audio data, and sub-video data (Com Video, Comp Audio, Comp Sub-pict) are subdivided into fixed packs, and can be played back in VOBU units so that they can be played back in the order of the time code of each data. A video object (VO) composed of a plurality of cells as shown in FIG.
B) is constructed, and this set of video objects is formatted into a title set structure.

In the flow shown in FIG. 53, the program chain information uses the database of the system controller (Sys con) 205 in the process of step S277, or re-inputs data as necessary. And is described as program chain information (PGI).

FIG. 54 shows a disk formatter system for recording a title set formatted as described above on an optical disk. As shown in FIG. 54, in the disk formatter system, these file data are stored in the volume formatter (VF) from the memories 220 and 222 storing the created title sets.
MT) 226. In the volume formatter (VFMT) 226, the management information is extracted from the title sets 84 and 86, the video manager 71 is created, and the logical data to be recorded on the disc 10 in the arrangement order shown in FIG. 4 is created. Data for error correction is added to the logical data created by the volume formatter (VFMT) 226 by the disk formatter (DFM).
T) At 228, the data is added and reconverted into physical data to be recorded on the disk. In the modulator 230, the physical data generated by the disk formatter (DFMT) 228 is converted into the recording data to be actually recorded on the disk, and the modulated recording data is converted by the recorder 232 into the disk 10 (recorder). Will be recorded.

A standard flow for creating the above-described disc will be described with reference to FIGS. 55 and 56. FIG.
5 shows a flow in which logical data to be recorded on the disk 10 is created. That is, step S28
As shown by 0, parameter data such as the number of video data files, the order of arrangement, and the size of each video data file are set first. Next, from the parameters set as shown in step S281 and the video title set information 281 of each video title set 72, the video manager 7
1 is created. Thereafter, as shown in step S282, the video manager 71 and the video title set 72
, Data is arranged along the corresponding logical block number, and logical data to be recorded on the disk 10 is created.

Thereafter, a flow for creating physical data to be recorded on the disc as shown in FIG. 56 is executed. That is, as shown in step S283, the logical data is divided into a fixed number of bytes, and error correction data is generated. Next, as shown in step S284, the logical data divided into a fixed number of bytes and the generated data for error correction are combined to create a physical sector. afterwards,
As shown in step S285, physical data is created by combining physical sectors. As described above, modulation processing based on a certain rule is performed on the physical data generated by the flow shown in FIG. 56 to create recording data. Thereafter, the recording data is recorded on the disk 10.

The data structure described above can be applied not only to a case where the data is recorded on a recording medium such as an optical disk and distributed to a user for reproduction, but also to a communication system as shown in FIG. That is, according to the procedure shown in FIGS.
An optical disk 10 storing a video manager 71, a video title set 72, and the like as shown in FIG. 1 is loaded into a reproducing apparatus 300, and encoded data is digitally extracted from a system CPU 50 of the reproducing apparatus. The signal may be transmitted to the user or the cable subscriber side by radio wave or cable by 310. Also, data encoded on the provider side such as a broadcasting station by the encoding system 320 shown in FIGS. 51 and 54 is created, and this encoded data is similarly transmitted to the modulator / transmitter 3.
10 may be sent to the user or cable subscriber side by radio wave or cable. In such a communication system, the information of the video manager 71 is first modulated by the modulator / transmitter 310 or directly distributed to the user free of charge, and when the user is interested in the title, the user or the subscriber is notified. The title set 72 is transmitted to the user by the modulator / transmitter 310 via radio waves or a cable in response to a request from the user. In the transfer of the title, first, the video title set information 94 is transmitted under the control of the video manager 71, and then the title video object 95 in the video title set reproduced by the title set information 94 is transferred. At this time, if necessary, a video object 95 for a video title set menu is also sent. The transmitted data is received by the receiver / demodulator 400 on the user side, processed as encoded data by the system CPU unit 50 of the reproducing apparatus on the user or subscriber side shown in FIG. Is played.

In the transfer of the video title set 72, attribute information (VMGM) is used as video data management information.
_V_ATR, VMGM_AST_ATR, VMGM_
SPST_ATR), (VTSM_V_ATR, VTS
M_AST_ATR, VTSM_SPST_ATR) and (VTS_V_ATR, VTS_AST_ATR, V
Since TS_SPST_ATR) is transferred for each title set, video data and the like can be subjected to playback processing under appropriate playback conditions in the playback system on the user or subscriber side.

In the above description, the video object unit has been described as a data string including video, audio, and sub-pictures. However, the video object unit may include any of video, audio, and sub-pictures. It may be constituted only by a pack.

[0156]

As described above, the attribute information of the video / audio and sub-picture data is described for each video title set, and the data in the video title set can be optimally reproduced by referring to the attribute information. Moreover, by preparing a plurality of title sets in which video / audio and sub-picture data having different attribute information are stored and storing them on an optical disc, even a playback system having a different standard can be used in a manner suitable for the playback system. Video / audio and sub-picture data can be reproduced.

Also, according to the present invention, when there are a plurality of audio streams and sub-picture streams for video data, the attributes for each stream and channel are recorded in the respective numbers and in the order of the numbers. It is possible to easily acquire the data attribute of the audio stream or the sub-video stream, and set the reproduction system to an optimal reproduction state in accordance with the specified audio stream or the sub-video stream. Information on whether or not to allow the original video to be changed to a display mode suitable for the playback screen is described as attribute information, so that videos and the like are always reproduced with the intention of the creator reflected. can do.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an optical disk device according to one embodiment of the present invention.

FIG. 2 is a block diagram illustrating details of a mechanical unit of the disk drive device illustrated in FIG. 1;

FIG. 3 is a perspective view schematically showing a structure of an optical disk loaded in the disk drive device shown in FIG.

FIG. 4 shows a structure of a logical format of the optical disc shown in FIG.

FIG. 5 shows a structure of a video manager shown in FIG.

FIG. 6 shows a video object set (VO) shown in FIG.
2 is an example showing the structure of BS).

FIG. 7 is a video manager (VMGI) shown in FIG. 5;
Volume manager information management table (VMGI)
_MAT).

FIG. 8 is a bit table describing video attributes of VMGM shown in FIG. 7;

FIG. 9 is an explanatory diagram showing a relationship between a display aspect ratio and a display mode according to description contents of a video attribute of VMGM.

FIGS. 10A and 10B are plan views for explaining that the display of the letter box shown in FIG. 9 changes when the frame rate is different.

FIG. 11 is a bit table describing audio stream attributes of VMGM shown in FIG. 7;

FIG. 12 is a bit table describing a VMGM sub-picture stream attribute shown in FIG. 7;

FIG. 13 shows a video manager (VMG) shown in FIG. 5;
Title search pointer table (TSPT) in I)
The structure of is shown.

14 shows parameters and contents of information (TSPTI) of the title search pointer table (TSPT) of the title search pointer table (TSPT) shown in FIG. 13;

15 shows parameters and contents of a title search pointer (TT_SRP) corresponding to an input number of the title search pointer table (TSPT) shown in FIG.

FIG. 16 is a view for explaining the structure of a program chain stored in a file.

FIG. 17 shows a video manager (VMG) shown in FIG. 5;
I) Video title set attribute table (VTS_
ATRT).

18 shows parameters and contents of video title set attribute table information (VTS_ATRTI) of the video title set attribute table (VTS_ATRT) shown in FIG.

19 shows parameters and contents of a video title set attribute search pointer (VTS_ATR_SRP) of the video title set attribute table (VTS_ATRT) shown in FIG.

20 shows parameters and contents of a video title set attribute (VTS_ATR) of the video title set attribute table (VTS_ATRT) shown in FIG.

FIG. 21 shows the structure of the video title set shown in FIG.

22 shows parameters and contents of a video title set information management table (VTSI_MAT) of the video title set information (VTSI) shown in FIG. 21.

FIG. 23 is a table (VTSI_MA) shown in FIG. 21;
T) described in the audio stream attribute (VTS_
9 shows a bit map table of the AST_ATR).

FIG. 24 shows a structure of a table (VTS_PGCIT) of video title set program chain information shown in FIG. 21.

25 shows parameters and contents of information (VTS_PGCITI) of the table (VTS_PGCIT) of the video title set program chain information shown in FIG. 24.

26 shows parameters and contents of a search pointer (VTS_PGCIT_SRP) of the table (VTS_PGCIT) of the video title set program chain information shown in FIG. 24.

FIG. 27 shows a structure of program chain information (VTS_PGCI) for a video title set corresponding to the program chain of the video title set program chain information table (VTS_PGCIT) shown in FIG.

FIG. 28 shows the program chain information (V
TS_PGCI) General information of program chain (P
GC_GI).

FIG. 29 shows the program chain information (V
TS_PGCI) Program chain map (PG
C_PGMAP).

30 shows parameters and contents of an entry cell number (ECELLN) for a program described in the program chain map (PGC_PGMAP) shown in FIG. 19;

FIG. 31 shows the program chain information (V
TS_PGCI) cell reproduction information table (C_PBI)
The structure of T) is shown.

FIG. 32 shows a cell reproduction information table (C_
(PBIT) parameters and contents.

FIG. 33 shows the program chain information (V
3 shows a structure of cell position information (C_POSI) of the TS_PGCI.

FIG. 34 shows cell position information (C_POS) shown in FIG.
The parameters and contents of I) are shown.

FIG. 35 shows the structure of the navigation pack shown in FIG.

FIG. 36 shows a structure of a video, audio, and sub-picture pack shown in FIG. 6;

FIG. 37 shows parameters and contents of playback control information (PCI) of the navigation pack shown in FIG. 35.

FIG. 38 shows parameters and contents of general information (PCI_GI) in the reproduction control information (PCI) shown in FIG. 37.

39 shows parameters and contents of the disc search information (DSI) of the navigation pack shown in FIG. 35.

40 is a diagram showing disc search information (DS) shown in FIG.
The parameters and contents of DSI general information (DSI_GI) of I) are shown.

FIG. 41 shows a video object (VO) shown in FIG. 37;
B) shows the parameters of the synchronous reproduction information (SYNCI) and their contents.

FIG. 42 is a block diagram showing a circuit configuration of the video decoder unit shown in FIG. 1;

FIG. 43 is a block diagram showing a circuit configuration of the audio decoder unit shown in FIG. 1;

FIG. 44 is a block diagram showing a circuit configuration of a sub-picture decoder unit shown in FIG. 1;

FIG. 45 is a block diagram showing a circuit configuration of a video reproduction processing unit shown in FIG. 1;

FIG. 46 is a block diagram showing a circuit configuration of the audio reproduction processing unit shown in FIG. 1;

FIG. 47 is a block diagram showing a circuit configuration of the audio mixing unit shown in FIG. 1;

FIG. 48 is a flowchart illustrating a process of acquiring a video data attribute and setting a playback system.

FIG. 49 is a flowchart for describing processing for acquiring an audio data attribute and setting a playback system;

FIG. 50 is a flowchart for explaining a process of acquiring a sub-picture data attribute and setting a playback system;

FIG. 51 is a block diagram illustrating an encoder system that generates video files by encoding video data.

FIG. 52 is a flowchart showing an encoding process shown in FIG. 51.

FIG. 53 is a flowchart of creating a video data file by combining main video data, audio data, and sub-picture data encoded by the flow shown in FIG. 52;

FIG. 54 is a block diagram showing a disc formatter system for recording a formatted video file on an optical disc.

FIG. 55 is a flowchart of creating logical data to be recorded on a disk in the disk formatter shown in FIG. 54;

FIG. 56 is a flowchart for creating physical data to be recorded on a disk from logical data.

FIG. 57 is a schematic diagram showing a system for transferring the video title set shown in FIG. 4 via a communication system.

[Explanation of symbols]

4 Key operation / display section 6 Monitor section 8 Speaker section 10 Optical disk 11 Motor drive circuit 12 Spindle motor 16 Light reflection layer 24 Clamping area 26 Lead-out area 27 Lead-in area 28 Data Recording area 30 Disk drive section 32 Optical head 32 33 Feed motor 36 Focus circuit 37 Feed motor drive circuit 38 Tracking circuit 40 Head amplifier 44 Servo processing circuit 50 System CPU section 52 System ROM / RAM unit 54 ... system processor unit 56 ... data RAM unit 58 ... video decoder unit 60 ... audio decoder unit 62 ... sub-picture decoder unit 64 ... D / A and data reproduction unit 70 ... volume and file structure Area 71: Video manager (VMG) 72: Video title set (VTS) 73: Other recording area 74: File 75: Video manager information (VMGI) 76: Video object set (VMGM_VOBS) for video manager menu 77: Video Backup of manager information (V
MGI_BUP) 78 Video management information management table (VMGI_M)
AT) 79… Title search pointer table (TT_
SRPT) 80 Video title set attribute table (VTS_ATRT) 82 Video object set (VOBS) 83 Video object (VOB) 84 Cell 95 85 Video object unit (VOBU) 86 Navigation pack (NV pack) 88 Video Pack (V-pack) 90 ... Sub-picture pack (SP pack) 91 ... Audio pack (A-pack) 95 ... Video object set for menu of video title set (VTSM_VOBS) 96 ... Video object set for title of video title set ( VTSTT_VOBS) 97 Backup of video title set information (VTSI) 98 Video title set information management table (V
TSI_MAT) 99 Video title set part of title search pointer table (VTS_PTT_SRPT) 100 Video title set program chain information table (VTS_PGCIT) 101 Video title set time search map table (VTS_MAPT) 104 PGC information (VTS_PGCI) 106 Program Chain program map (P
GC_PGMAP) 107 Cell playback information table (C_PBIT) 108 Cell location information table (C_POSIT) 111 Video title set menu PGCI unit table (VTSM_PGCI_UT) 112 Video title set cell address table (VTS_C_ADT) 113 VTS_PGCIT search pointer (V
TS_PGCIT_SRP) 116 PCI packet 117 DSI packet 201 Video reproduction processing unit 202 Audio reproduction processing unit 203 Audio mixing unit 207 Sub-video reproduction processing unit 204 Frame rate processing unit 205 Aspect processing unit 206 Pan scan Processing unit 201: Video tape recorder (VTR) 202: Audio tape recorder (ATR) 203: Sub-picture reproducer (Subpicture, source) 205: System controller (Sys, con) 206: Video encoder (VENC) 207: Audio encoder ( AENC) 208… Sub-picture encoder (SPENC) 215… Memory 226… Volume formatter (VFMT) 228… Disk formatter (DFMT) 23 0: Modulator 232: Recorder 320: Encoding system 310: Modulator / transmitter

Continuing from the front page (72) Inventor Shinichi Kikuchi 3-3-9, Shimbashi, Minato-ku, Tokyo Inside Toshiba Abu E Co., Ltd. (72) Inventor Tomoaki Kurano 70 Yanagimachi, Yuki-ku, Kawasaki-shi, Kanagawa Stock Company (72) Inventor Takeshi Hagio 1-1-1, Shibaura, Minato-ku, Tokyo Inside the Toshiba head office (56) References JP-A-9-51501 (JP, A) (58) Survey Field (Int.Cl. ⁶ , DB name) H04N 5/85 G11B 20/12 102 H04N 5/92

Claims (9)

(57) [Claims] 1. An optical disc having a video management area defined between a lead-in area and a lead-out area and separated by a logical sector boundary and a data recording area including at least one or more title set areas. The title set area includes a video in which video, audio and sub-picture data constituting the title set are respectively stored, a reproduction target area in which audio and sub-picture packs are continuously recorded, and this video. , A title set information area in which title set information for controlling reproduction of audio and sub-picture data is recorded, and the title set information appropriately stores video, audio and sub-picture data of the title set. Video attribute information, audio attribute information and sub-picture attribute information to be played The video management area includes: an attribute information table in which video attribute information, audio attribute information, and sub-image attribute information of the title set are described for each title set. An optical disc characterized by recording information. 2. The video attribute information includes information on a compression mode of the video data, the audio attribute information includes information on an audio coding mode of the audio data, and the sub-picture attribute information includes The optical disc according to claim 1, wherein the optical disc includes information on a sub-picture coding mode of the sub-picture data. 3. The optical disk according to claim 1, wherein the video attribute information includes information on a frame rate and a display aspect ratio of the video data. 4. The optical disc according to claim 1, wherein the audio attribute information includes information on a quantization bit number of audio data and information on a sampling frequency. 5. The optical disk according to claim 1, wherein the audio attribute information includes information on the number of audio channels of audio data. 6. The audio attribute information includes:
2. The optical disc according to claim 1, wherein the data includes information on an audio type whether or not the data is related to a language. 7. The optical disk according to claim 1, wherein the sub-picture attribute information includes information on a sub-picture type indicating whether or not the sub-picture data is related to a language. 8. The video management area further includes a video management menu area in which video management menu data for displaying a menu related to the selection of the title set is recorded. Video and sub-picture data are respectively stored in the video and sub-picture packs,
2. The optical disc according to claim 1, wherein the video management area describes menu video attribute information and menu sub-video attribute information for appropriately reproducing the menu video and sub-video data. . 9. The title set area further includes a title set menu area in which title set menu data for displaying a menu including selection items related to reproduction of the title set is recorded. The set menu data is composed of a video and sub-picture pack in which video and sub-picture data for the menu are stored, respectively. In the title set information area, the video for the menu and the sub-picture data are stored. The optical disk according to claim 1, wherein menu video attribute information and menu sub-video attribute information for appropriately reproducing the sub-video data are described.