JPH10178614A - Receiving of digital broadcasting signal and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To immediately reproduce without a viewer performing a complicated operation by recording a broadcasting program with a digital signal multiplexed in a packet format and also extracting and recording data that is needed when the viewer designates and reproduces his desired program at the time of reproduction in such cases. SOLUTION: When a signal that is received through a QPSK demodulating part 402 is recorded in a recording and reproducing part 423, a 2nd multiplex separating part 413 extracts a desired multiplexed signal such as a PAT, PMT, video, sound, etc., which are defined by an MPEG2 international standard, converts it into a transmission rate that adjusts to recording and reproduction and sends it to the part 423. At the time of reproduction, a 1st multiplex separating part 404 receives a reproduced signal via a switch 424, recognizes a channel number by referring to the PAT, recognizes a packet ID of video and sound by referring to the PMT and sends a desired video and sound stream to an MPEG2 decoder 405.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal receiving and recording / reproducing apparatus, and more particularly to a digital broadcast signal receiving and recording / reproducing apparatus for recording and reproducing a digital signal as it is.

[0002]

2. Description of the Related Art As a conventional technique for recording and reproducing a digital signal, a receiving system and a recording / reproducing apparatus for receiving and recording a digital signal transmitted by multiplexing a plurality of pieces of information are disclosed in JP-A-8-98164. It is stated in. In the above-mentioned conventional technique, a receiving means for receiving a digital information signal transmitted by multiplexing a plurality of information and selecting desired information, and a recording means for recording the information received by the receiving means are provided. A receiving system is described. Japanese Patent Application Laid-Open No. H8-5635 discloses a technique for selecting a desired program when presenting a program by receiving a digital signal transmitted by multiplexing a plurality of pieces of information.
0. In the conventional technique, a plurality of programs are packetized by adding packet identifiers, and transmission control data indicating the correspondence between the programs and the packet identifiers is also packetized. Each of these packets is multiplexed. Describes a device for searching for each program from a multiplexed signal transmitted by electronic mail.

[0003]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Laid-Open No. 8-98
The prior art described in H.164 does not describe a method of separating and reproducing only information relating to a desired program from information multiplexed during reproduction of a recorded program. On the other hand, in the prior art described in Japanese Patent Application Laid-Open No. 8-56350, a search means for extracting and presenting a desired signal from a multiplexed digital signal is described. However, for example, a conventional analog V
In general, when a program recorded in a TR is to be reproduced, it can be reproduced by simply pressing a reproduction switch without any other operation.
Even when the digital information signal technology described in Japanese Patent No. 98164 and the technology described in Japanese Patent Application Laid-Open No. 8-56350 are combined, a troublesome operation such as a program search must be performed during reproduction. A method of reproducing a desired program immediately recorded by simply pressing one switch like a system VTR cannot be realized.

An object of the present invention is to provide a digital broadcast signal receiving and recording / reproducing apparatus capable of immediately reproducing a program recorded as a digital signal without any troublesome operation as in the case of the analog VTR. With the goal.

[0005]

In a system for multiplexing and transmitting all video, audio, data, and the like as digital information into one bit string of a predetermined packet format, at least receiving the transmitted digital information, Channel decoding means for demodulating to a bit stream of a predetermined format, first packet separating means for extracting a packet specified from the bit string, and decoding of information such as video / audio / data output from the packet separating unit And source control means for outputting a television signal, and control means for analyzing the information packet output from the first packet separating means and controlling the system, and newly providing a signal from the output bit string of the channel decoding means. Second packet separating means for extracting a specified packet; Speed conversion means for converting a transmission rate of a bit string output from the second packet separation means, and interface means for converting an output of the speed conversion means into an input / output format of an external recording / reproducing device; Is output to the first packet separating means, and the video / audio / data signal can be decoded as a television signal.

[0006]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a block configuration of a digital broadcast signal receiving and recording / reproducing apparatus according to the present invention. In the following description, the antenna 300 is a quadrature.
An example of receiving a satellite broadcast wave digitally modulated by the PhaseShift Keying (hereinafter abbreviated as QPSK) method is shown below.
Thus, the transmission method used in the present invention is limited to satellite broadcasting, and the modulation method is not limited to QPSK method. Moving Picture Experts Group 2 (hereinafter referred to as MPEG2) is an international standard for signal compression and decompression.
An abbreviated example is shown, but the compression and decompression method of the signal used in the present invention is not limited to MPEG2.

In FIG. 1, reference numeral 300 denotes an antenna, 301
Is a converter for converting a received radio wave into a tuner input signal, 302 is a cable, 401 is a tuner, and 402 is Q
PSK demodulation circuit 403, Forward Error Correction (hereinafter abbreviated as FEC) for correcting an error of a signal accompanying transmission,
414 and 424 are switches, 413 is a second demultiplexing unit, 423 is a signal recording / reproducing unit, 404 is a first demultiplexing unit, 405 is an MPEG2 decoder, 406 is a video encoder, 407 is a D / A converter, and 408 Is On S
creen Display (hereinafter abbreviated as OSD), 409 is a control means, 410 is a television, and 434 and 415 are
A RAM (Random Access Memory) for expanding data by the 1 demultiplexing unit 404 and the MPEG2 decoder 405;
419 is an R which stores an operation program of the control means 409.
OM (Read Only Memory).

In FIG. 1, a radio wave transmitted from a satellite (not shown) is received by an antenna 300 and converted by a converter 30.
At 1, the signal is converted into a tuner input signal and input to the tuner 401 via the cable 302. In the example shown in FIG. 1, the tuner 401 selects and outputs a desired signal from the input signal in accordance with the setting of the control unit 409. The output of the tuner 401 is demodulated by a QPSK demodulation circuit 402,
It is input to EC403. The FEC 403 performs error correction of an input digital signal accompanying transmission.

The digital signal obtained by correcting the error of the input signal as described above is converted into switches 414 and 424.
The operation when input to the first demultiplexing unit 404 via the. Satellite digital broadcasting described in the present invention is:
In general, there is a feature that a plurality of programs can be multiplexed on one radio wave relayed by a radio wave transponder (not shown) mounted on a satellite. The first demultiplexer 404 selects a desired program from the multiplexed programs.
The signal separated by the first demultiplexer 404 is input to the MPEG2 decoder 405. MPEG2 decoder 405
Expands the compressed digital signal and reproduces the digital video signal and digital audio signal before compression. The reproduced digital video signal is sent to the video encoder 406 via the OSD circuit 408, and the digital audio signal is sent to the D / D converter 408.
/ A converter 407. The video encoder 406 converts the input digital video signal into an analog video signal and outputs the analog video signal to the television 410. On the other hand, D / A
Converter 407 converts the input digital audio signal into an analog audio signal and outputs the analog audio signal to television 410. The above operation is controlled by a control unit 409 that operates according to a program stored in the ROM 419.

In the above description, the first demultiplexer 4
An example of a general procedure for separating desired program information at 04 will be described with reference to FIGS. First demultiplexer 4
The signal input to 04 has a configuration in which the packets shown in FIG. 2A are multiplexed. FIG. 2B shows an example of multiplexing.
The operation described below is performed by processing the multiplexed signal in the first demultiplexer 404 as shown in FIG. 2B. FIG. 3 shows an example of the operation in the demultiplexing unit. First, in step 201, the viewer inputs the organization channel of the program desired to be viewed. An organization channel is a method of summarizing video, audio, and the like that constitute one program, and corresponds to a television channel in conventional analog broadcasting. In digital broadcasting, one frequency in which a plurality of programs are multiplexed is generally called a physical channel.
Next, in step 202, a PAT (Program Association Table) included in the currently received multiplexed signal (= Transport Stream, hereinafter referred to as TS) is received.
PAT is one of the tables in PSI (Program Specific Information) defined by the MPEG2 standard which is an international standard. In step 203, a desired organization channel is searched from the PAT received in step 202. If there is a desired composition channel, the process proceeds to step 207. If there is no desired knitting channel, the process proceeds to step 204, where the NIT which is one of the PSI and describes the relationship between the knitting channel and the physical channel is described.
(Network Information Table) is received, a physical channel including a desired organization channel is acquired, and in the next step 205, the physical channel is acquired in step 204. The shift of the physical channel is performed by the control means 40 in the actual circuit as shown in FIG.
This is performed by setting the frequency to be tuned to the tuner 401 from 9. Thereafter, in step 206, the PAT of the TS in the physical channel after the shift is received. When the PAT is received, the PID (Packet Map) of the PMT (Program Map Table) in which the PIDs of the video, audio, etc. constituting the composition channel input in step 207 are described.
ID) from the PAT, and receives a PMT having the PID. Here, PMT is one of the tables of PSI, and PID is a packet identifier included in the header of the packet. Since the PMT describes PID such as PCR (Program Clock Reference) indicating video, audio and time information constituting each channel included in the TS being received, the video and audio of a desired program are described in step 208. , PCR and the like. After that, the acquired PID is set in the first demultiplexing means 404 in step 209, and the desired video and audio streams are received and input to the MPEG2 decoder 405 for decoding.

The video signal decoded by the operation described above is processed by the NTSC encoder via the OSD 408 to be converted into an analog signal, and the audio signal is converted to a D / D signal.
By converting the signal into an analog signal by the A converter 407 and inputting the signal to the television 410, a program desired by the viewer can be presented.

Next, a procedure for recording a signal received by the recording / reproducing means 423 through the switch 414 and the second demultiplexer 413 and reproducing a signal recorded from the recording / reproducing means 423 through the switch 424 will be described.

When a signal is recorded in the recording / reproducing means 423, the switch 414 is controlled under the control of the control means 409.
Is switched to connect the FEC 403 and the second demultiplexing unit 413. The second demultiplexing unit 413 is means for extracting only data necessary for a viewer to reproduce only a desired program at the time of reproduction after recording. In the embodiment of FIG. 1, PCR (Program Cloc) which is data indicating time information required by the MPEG2 decoder 405 in addition to each TS such as PAT, PMT, video and audio described above.
k Reference) and only information relating to a desired program (currently viewed program) from the program-related information.

FIG. 13 shows an example of the configuration of the second demultiplexing section 413. In FIG. 13, it comprises a demultiplexing means 4131 for extracting desired information, and a speed converting means 4132 for converting the transmission rate of the output signal of the demultiplexing means 4131 so as to conform to the recording / reproducing means. The speed conversion unit 4132 is specifically, for example,
O (Fast in Fast Out) memory.

FIG. 14 shows another configuration example of the second demultiplexing section 413. In FIG. 14, reference numeral 4133 denotes an interface unit between the second demultiplexing unit 413 and the recording / reproducing unit 423. For example, when a signal output from the speed converting unit 4132 is a parallel signal, the unit converts the signal into a serial signal. is there. The signal extracted by the second demultiplexing unit 413 having the configuration as shown in FIG. 13 or FIG. 14 is recorded in the recording / reproducing unit 423. During playback,
The signal reproduced by the recording / reproducing means 423 is switched by a switch 424.
To the demultiplexing means 404 via When the signal recorded in the recording / reproducing unit 423 is reproduced, the demultiplexing unit 404 controls the control unit 409 to operate according to the procedure shown in FIG. Hereinafter, the operation will be described. In general, a PID indicating program-related information is indicated by a specific value irrespective of a program, and the present embodiment will be described on the premise of this.

When a signal is input from the recording / reproducing means 423, the first demultiplexing means 404 first receives desired program-related information as shown in step 441 under the control of the control means 409, and The number of the organization channel described in the related information is obtained. Next, at step 442, the PAT is received. The channel number of the composition channel recorded at this stage is set in step 4
Since it is known at 41, in the next step 443, the PID of the PMT in which the PID of the recorded program such as video and audio is described can be obtained immediately. The following procedure is the same as that described in FIG.

As described above, in the present embodiment, a program reproduced from the recording / reproducing means 423 which records a program in the state of a multiplexed digital signal is immediately demultiplexed without a complicated operation by a viewer. Can be decoded and presented. Furthermore, since desired program-related information is recorded, services using information on programs, which is one of the features of digital broadcasting, can be enhanced.

FIG. 5 shows a second embodiment of the present invention. In the embodiment of FIG. 1, only the desired program-related information is extracted by the second demultiplexer 413, but in the embodiment of FIG. 5, it is not distinguished whether the information is related to the desired program. In this configuration, all program-related information is extracted and recorded.

FIG. 6 shows a procedure for processing a reproduced signal from the recording / reproducing means 423 when the configuration of the embodiment of FIG. 5 is used. The procedure of FIG. 6 does not include the procedure of acquiring the organization channel from the desired program-related information in step 441 in the procedure shown in FIG.
It is checked in step 601 whether or not the PID described in (1) matches the recorded PMT. If they do not match, the operation of step 601 is repeated until they match, and if they match, the operation moves to step 602. The subsequent operation is the same as that after step 443 in FIG.

According to the embodiment shown in FIG. 5, the circuit configuration of the second demultiplexer 413 can be simplified as compared with the embodiment shown in FIG. The service can be enhanced using the information on the program described in the related information.

FIG. 7 shows a third embodiment of the present invention. FIG.
5 is different from the embodiment in FIG. 5 in that only the PAT, PMT, PCR, video and audio data are extracted without extracting the program-related information. Thereby, the configuration of the second demultiplexing unit 413 can be further simplified as compared with the case of the embodiment of FIG.

FIG. 8 shows a fourth embodiment of the present invention. FIG.
This embodiment differs from the embodiment of FIG. 1 in that the second demultiplexing unit 413 extracts only PMT, PCR, video and audio and that a PID rewriting means 433 is provided. That is, in the embodiment of FIG. 8, the PID of the PMT is
09 to a specific value to be set, and
23 to record signals. Thus, when reproducing the recorded signal, the PID of the PMT is known in advance, and the video, audio, and P
The PID of the CR can be immediately obtained, and can be reproduced immediately without complicated operations by the user as in the embodiment of FIG.

FIG. 9 shows a fifth embodiment of the present invention. FIG.
8 differs from the embodiment of FIG. 8 in that only the information of PCR, video and audio is extracted by the second demultiplexing unit 413, and the PID of the PCR, video and audio is The point is that a specific value set by the control unit 409 is rewritten.

According to the embodiment of FIG. 9, since the PIDs of the recorded PCR, video and audio are known in advance at the time of reproduction, the reproduction is immediately performed without complicated operation by the user as in the case of the embodiment of FIG. In addition, the amount of information to be recorded can be made smaller than in the embodiment of FIG. 8, and the configuration of the second demultiplexer 413 can be simplified.

FIG. 10 shows a sixth embodiment of the present invention. The embodiment of FIG. 10 differs from the embodiment of FIG. 9 in that a packet insertion unit 453 is provided instead of the PID rewriting unit 433. In the embodiment of FIG. 10, the second demultiplexer 413 acquires the PID of each piece of information such as the desired PCR, video, and audio, extracts the PCR, video, and audio, and inputs the extracted information to the packet insertion unit 453. . The packet inserting means 453 adds the PC signal acquired by the second demultiplexer 413 to the input signal from the second demultiplexer 413.
A packet describing a PID such as R, video, audio, etc. is created, inserted, and recorded in the recording / reproducing unit 423. When reproducing the recorded signal, the first demultiplexing unit 404 first controls the control unit 409 so as to receive the packet inserted by the packet insertion unit 453, and the PCR and the video described in this are controlled. Since a PID such as audio is acquired, a desired program can be presented immediately without complicated operation by the user as in the embodiment of FIG. In the above description, the packet inserting means 45
As the PID of the packet to be inserted by MPE3, MPE
The same PID as the PAT defined in the G2 standard may be given. In the MPEG2 standard, PAT PID
Is specified to be a specific value. Therefore, when the first demultiplexing unit 404 processes the signal reproduced from the recording / reproducing unit 423, the control unit 409 first sets P
First to extract packets with the same PID as the AT
The operation described with reference to FIG. 10 can be realized by setting in advance to control the demultiplexing means 404.

As described above, by using the embodiment of FIG. 10, a desired program can be presented immediately without complicated operation by the user.

FIG. 11 shows a seventh embodiment of the present invention. In FIG. 11, reference numeral 463 denotes a transmission rate detecting means. FIG.
In FIG. 1, the second demultiplexing means 413 corresponds to FIG.
As in the case of the first embodiment, additional data such as program information is extracted together with information such as video and audio. No. 2
The TS output from the demultiplexer 413 is input to the transmission rate detector 463. Transmission rate detecting means 46
If it is detected in step 3 that the transmission rate of the input TS has exceeded a predetermined value, the transmission rate detection means 463 sends a signal notifying the control means 409 that the transmission rate has exceeded the preset value. Output. When the notification signal from the transmission rate detecting unit 463 is input, the control unit 409 controls the second demultiplexing unit 413 to extract information that does not directly affect the presentation of the program according to a preset priority. Control not to. That is, for example, when the transmission rate of the TS output from the second demultiplexing unit 413 exceeds a preset value, for example, the extraction of the program information is stopped, and the multiplexing output from the second demultiplexing unit 413 is stopped. The signal transmission rate is set to be equal to or less than a certain value.

As described above, in the embodiment of FIG. 11, for example, when the recording / reproducing means 423 uses a recording means having an upper limit on the transmission rate of the multiplexed signal that can be recorded, the multiplexed signal to be recorded is As long as the transmission rate does not exceed the preset transmission rate, additional information such as program information can be added together with information such as video and audio that make up the program to increase added value, and the transmission rate of the multiplexed signal to be recorded is preset Even if the transmission rate is exceeded, the program information can be recorded by stopping the extraction of information not directly related to the presentation of the program contents.

FIG. 12 shows an eighth embodiment of the present invention. In FIG. 12, reference numeral 473 denotes switch means. In FIG. 12, the second demultiplexing unit 413 extracts recording-related information related to copyright protection and the like, and when information indicating that recording is prohibited is extracted as the recording-related information,
The control means 409 detects that the information for prohibiting the recording has been extracted and controls the switch means 473 so that the signal output from the second demultiplexing means 413 is output to the recording / reproducing means 42.
3 is not applied.

That is, by using the embodiment of FIG.
When a signal to which information for prohibiting recording is added is transmitted on the transmitting side for the purpose of copyright protection or the like, an operation according to the signal can be performed.

In the embodiment shown in FIG. 12, an example is shown in which the switch means 473 is provided to inhibit the recording. However, a part of the second demultiplexing means 413 (speed conversion means 4132) is provided from the control means 409. Obviously, the same effect can be obtained by controlling to stop all operations.

In the embodiment, the first multiplexing / demultiplexing means 404 and the second multiplexing / demultiplexing means 413 are described as separate circuits. However, these two means may be the same circuit block.

[0034]

As described above, even when the information amount of a signal transmitted by using the present invention is different from the information amount that can be recorded on a recording / reproducing apparatus, a digital signal relating to a desired program or the like can be selectively provided. Only the signal can be recorded, and the recorded program can be immediately reproduced without complicated operation at the time of reproduction.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a packet structure and a packet multiplexing method.

FIG. 3 is a diagram showing a procedure of program presentation.

FIG. 4 is a diagram showing a procedure of program presentation.

FIG. 5 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 6 is a diagram showing a procedure of program presentation.

FIG. 7 is a diagram showing a configuration of a third embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a fourth embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of a fifth embodiment of the present invention.

FIG. 10 is a diagram showing a configuration of a sixth embodiment of the present invention.

FIG. 11 is a diagram showing a configuration of a seventh embodiment of the present invention.

FIG. 12 is a diagram showing a configuration of an eighth embodiment of the present invention.

FIG. 13 is a diagram showing one configuration of a second demultiplexing unit of the present invention.

FIG. 14 is a diagram showing one configuration of a second demultiplexing unit of the present invention.

[Explanation of symbols]

300 Antenna 301 Converter 302 Cable 401 Tuner 402 QPSK demodulation circuit 403 FEC 404
Demultiplexer 405 MPEG2 decoder 406 Video encoder 407 D / A converter 408 OSD 409 Control means 410 Television 413 Second multiplex separator 423 Recording / reproducing means 4
33 ... PID rewriting means 453 ... Packet insertion means 414, 424 ... Switch 415434 ... RAM 4
19 ... ROM

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Katsumata 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Multimedia Systems Development Division of Hitachi, Ltd. (72) Inventor Takumi Okamura Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa 292 Hitachi, Ltd. Multimedia System Development Headquarters (72) Inventor Takuya Matsumoto 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi, Ltd. Multimedia System Development Headquarters (72) Inventor Hideyuki Kiyo Kanagawa 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Hitachi, Ltd. Video Information Media Division (72) Inventor Yuji Hatanaka 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture, Hitachi, Ltd. Video Information Media Division

Claims (37)

[Claims] 1. A system for multiplexing and transmitting all video, audio, data, and the like as digital information into a single bit string in a predetermined packet format, and receiving at least the transmitted digital information, Channel decoding means for demodulating a bit string of a format, first packet separating means for extracting a packet designated from the bit string, and decoding of information such as video, audio and data outputted from the packet separating means, Source decoding means for outputting as a signal,
Control means for analyzing the information packet output from the first packet separation means and controlling the system, and newly extracting a designated packet from an output bit string of the channel decoding means; A speed converting means for converting a transmission rate of a bit string output from the second packet separating means; and an interface means for converting an output of the speed converting means into an input / output format of an external recording / reproducing device. A digital broadcast signal receiving apparatus, wherein an input bit string from the means is output to the first packet separating means, and a video / audio / data signal can be decoded as a television signal. 2. The digital broadcast signal receiving apparatus according to claim 1, wherein said second packet separating means includes a PAT (Program Association Table) packet defined by the MPEG2 standard and one or more PMTs (Program Specific Info).
rmation) A digital broadcast signal receiving apparatus, which is configured to extract a packet and a packet of video, audio, data, and the like defined by the PMT. 3. The digital broadcast signal receiving apparatus according to claim 2, wherein at the time of inputting a bit string from an external recording / reproducing device, said control means includes means for comparing said PAT and said PMT. A digital broadcast signal receiving apparatus characterized in that it is configured to perform control so as to determine data and the like. 4. The digital broadcast signal receiving apparatus according to claim 1, wherein said second packet separating means includes at least a PMT packet defined by the MPEG2 standard and video / audio / data defined by the PMT packet. An apparatus for receiving a digital broadcast signal, comprising means for extracting a packet and changing a packet ID of the PMT packet to a predetermined value. 5. The digital broadcast signal receiving apparatus according to claim 4, wherein when a bit string is input from an external recording / reproducing device, the control means extracts a PMT having a predetermined packet ID and reproduces the PMT according to the PMT. A digital broadcast signal receiving apparatus characterized by controlling video, audio, data, and the like. 6. The digital broadcast signal receiving apparatus according to claim 1, wherein said second packet separating means extracts packets of video, audio, data and the like, and extracts said video and audio.
An apparatus for receiving a digital broadcast signal, comprising means for changing a packet ID of voice / data to a predetermined value. 7. The digital broadcast signal receiving apparatus according to claim 6, wherein, when a bit string is input from an external recording / reproducing device, the control means transmits the video / audio / data having a predetermined packet ID to the first data. A digital broadcast signal receiving apparatus characterized in that the packet separating means controls the extraction. 8. The digital broadcast signal receiving apparatus according to claim 1, wherein said second packet separating means extracts packets of video, audio, data, and the like, and extracts said video / audio data.
A digital broadcast signal receiving apparatus characterized in that a new packet designating a packet ID such as voice / data is inserted. 9. The digital broadcast signal receiving apparatus according to claim 8, wherein the new packet designating a packet ID of video, audio, data, etc., is a PAT defined by the MPEG2 standard.
A digital broadcast signal receiving device having the same packet ID as that of the digital broadcast signal. 10. The digital broadcast signal receiving apparatus according to claim 8, wherein when a bit string is input from an external recording / reproducing device, said control means transmits a new packet specifying a packet ID of said video / audio / data. A digital broadcast signal receiving apparatus, characterized in that the first packet separating means controls the extraction. 11. The digital broadcast signal receiving apparatus according to claim 1, wherein said second packet separating means includes at least a PAT packet and a PMT packet defined by the MPEG2 standard and video / audio / data defined by the PMT. And a program information packet describing the contents of the video, audio, data, etc., is extracted. 12. The digital broadcast signal receiving apparatus according to claim 11, wherein at the time of inputting a bit string from an external recording / reproducing device, said control means extracts said program information packet in advance, and said control means extracts said program information packet based on said program information packet. 1
A digital broadcast signal receiving apparatus characterized in that control is performed so as to determine a packet of video, audio, data, etc. to be extracted by the packet separating means. 13. The digital broadcast signal receiving apparatus according to claim 11, wherein the program information packet is a specific program information packet describing information of a packet such as video, audio, and data extracted by the second packet separating means. A digital broadcast signal receiving device, characterized in that: 14. The digital broadcast signal receiving apparatus according to claim 13, wherein when a bit string is input from an external recording / reproducing device, the control means extracts the specific program information packet in advance and adds the specific program information packet to the specific program information packet. A digital broadcast signal receiving apparatus characterized in that it is configured to perform control so as to determine a packet of video, audio, data, etc. to be extracted by the first packet separating means. 15. A system for multiplexing and transmitting all video, audio, data, and the like as digital information into one bit string in a predetermined packet format, and receiving at least the transmitted digital information, Channel decoding means for demodulating into a bit string of a format, first packet separating means for extracting a packet specified from the bit string, and decoding of information such as video, audio, data and the like outputted from the packet separating means,
Source decoding means for outputting as a television signal, and control means for analyzing the information packet outputted from the first packet separating means and controlling the system, and newly designated from the output bit string of the channel decoding means. Second packet separating means for extracting a packet, speed converting means for converting the transmission rate of the bit string output from the second packet separating means, and recording / reproducing the output of the speed converting means as a digital signal Providing digital recording / reproducing means;
Receiving, recording, and reproducing a digital broadcast signal, wherein an input bit string from the reproducing means is output to the first packet separating means so that a video / audio / data signal can be decoded as a television signal. apparatus. 16. The apparatus for receiving and recording / reproducing a digital broadcast signal according to claim 15, wherein said second packet separating means includes a PAT packet, a PMT defined by the MPEG2 standard.
An apparatus for receiving, recording, and reproducing digital broadcast signals, wherein the apparatus extracts packets and packets such as video, audio, and data defined by the PMT. 17. The apparatus for receiving and recording / reproducing a digital broadcast signal according to claim 16, wherein said control means controls said PAT and said PAT when reproducing a bit string from said recording / reproducing means.
An apparatus for receiving and recording / reproducing a digital broadcast signal, characterized in that the apparatus includes means for comparing MTs and performs control so as to determine video, audio, data, and the like to be reproduced. 18. The digital broadcast signal receiving / recording / reproducing apparatus according to claim 15, wherein said second packet separating means includes at least a PMT packet defined by the MPEG2 standard and a video / audio defined by the PMT packet.・
An apparatus for receiving, recording and reproducing digital broadcast signals, comprising means for extracting a packet such as data and changing a packet ID of the PMT packet to a predetermined value. 19. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 18, wherein said bit stream is reproduced from said recording / reproducing means, and said control means extracts a PMT having a predetermined packet ID. An apparatus for receiving and recording / reproducing a digital broadcast signal, wherein the apparatus controls the video, audio, data and the like to be reproduced according to a PMT. 20. The digital broadcast signal receiving / recording / reproducing apparatus according to claim 15, wherein said second packet separating means extracts a packet such as video, audio, data, etc., and outputs said video, audio, data, etc. And means for changing the packet ID of the digital broadcast signal to a predetermined value. 21. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 20, wherein when reproducing the bit string from the recording / reproducing means, the control means controls video, audio, data, etc. having a predetermined packet ID. And receiving and recording / reproducing a digital broadcast signal. 22. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 15, wherein said second packet separating means extracts a packet such as video / audio / data and outputs said video / audio / data or the like. And a digital broadcast signal receiving / recording / reproducing apparatus. 23. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 22, wherein the new packet designating a packet ID of video, audio, data, etc., is an MPEG packet.
2. An apparatus for receiving, recording and reproducing digital broadcast signals, having the same packet ID as the PAT defined by the two standards. 24. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 22, wherein when reproducing the bit string from the recording / reproducing means, the control means specifies a packet ID of the video / audio / data. An apparatus for receiving and recording / reproducing a digital broadcast signal, wherein the first packet separating means controls the extraction of a unique packet. 25. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 15, wherein said second packet separating means includes at least a PAT packet defined by MPEG2, a PMT packet, and a video / video defined by the PMT. voice·
A digital broadcast signal receiving and recording / reproducing apparatus, wherein a packet of data and the like is extracted and a program information packet describing the contents of the video, audio, data and the like is extracted. 26. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 25, wherein at the time of reproducing a bit string from said recording / reproducing means, said control means extracts said program information packet in advance and adds said program information packet to said program information packet. A video to be extracted by the first packet separating means
A digital broadcast signal receiving and recording / reproducing apparatus characterized in that it is configured to control so as to determine a packet such as voice and data. 27. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 25, wherein the program information packet is specified by describing packet information such as video / audio / data extracted by the second packet separating means. And a recording / reproducing apparatus for digital broadcast signals, characterized by being a program information packet. 28. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 27, wherein the bit stream is reproduced from the recording / reproducing means, the control means extracts the specific program information packet in advance, and An apparatus for receiving, recording, and reproducing digital broadcast signals, characterized in that control is performed so as to determine a packet of video, audio, data, and the like to be extracted by the first packet separating means based on a program information packet. 29. The digital broadcast signal receiving apparatus according to claim 1, further comprising: means for stopping output of the interface means when the control means extracts the non-recordable information such as the video, audio and data. A digital broadcast signal receiving apparatus characterized by the above-mentioned. 30. The digital broadcast signal receiving apparatus according to claim 1, wherein when the control unit extracts the non-recordable information such as the video, audio, and data, the function of the second packet extracting unit is stopped. A digital broadcast signal receiving device, characterized by having: 31. The digital broadcast signal receiving / recording / reproducing apparatus according to claim 15, wherein the control means extracts the non-recordable information such as the video / audio / data.
An apparatus for receiving, recording and reproducing digital broadcast signals, comprising means for stopping the output of the speed conversion means. 32. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 15, wherein when the control means extracts the non-recordable information such as the video / audio / data,
An apparatus for receiving, recording and reproducing digital broadcast signals, comprising means for stopping the function of the second packet extracting means. 33. The digital broadcast signal receiving apparatus according to claim 1, wherein said second packet separating means includes at least a PAT packet and a PMT packet defined by the MPEG2 standard and video / audio / data defined by said PMT. And a program information packet describing the contents of the video, audio, data, etc., and a means for detecting a transmission rate of a signal output from the second packet separating means. A digital broadcast signal receiving device, comprising: 34. The control means according to claim 33, wherein when the transmission rate detection means detects that the transmission rate of the signal output by said second packet separation means exceeds a predetermined value, the control means specifies the predetermined value. A digital broadcast signal receiving apparatus, wherein the second packet separating means is controlled so as to stop the extraction of the packet. 35. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 15, wherein said second packet separating means includes at least a PAT packet and a PMT packet defined by the MPEG2 standard and a video / video defined by the PMT. voice·
In addition to extracting packets such as data, extracting program information packets describing the contents of the video, audio, data, etc., and detecting a transmission rate of a signal output from the second packet separating means. An apparatus for receiving and recording / reproducing a digital broadcast signal, characterized by comprising means. 36. The control means according to claim 35, wherein when the transmission rate detection means detects that the transmission rate of the signal output by said second packet separation means exceeds a predetermined value, the control means specifies a predetermined value. And a second packet separating means for controlling extraction of the digital broadcast signal so as to stop the extraction of the packet. 37. The digital broadcast signal receiving apparatus according to claim 1, further comprising means for stopping the output of the speed conversion means when the control means extracts the non-recordable information such as the video / audio / data. Digital broadcast signal receiving apparatus characterized by the following.