KR20000021578A - Method for controlling caption display on tv - Google Patents

Abstract

PURPOSE: A method for controlling caption display on TV is provided, so that a displaying location can be located in a corresponding speaker's circumference, when displaying an arbitrary caption. CONSTITUTION: A method for controlling caption display on TV comprises the steps of: transmitting location information in which text characters have to be displayed, with information of the text characters involved in a caption in predetermined sections of broadcasting signals, transmitted from a broadcasting station; deciding whether display location information for the text characters, among the broadcasting signals received from a TV set; detecting the location information on display of the caption, when deciding the location information exists, reading the location information, and recognizing coordinates for the display location of the caption; and displaying the text characters existing in the broadcasting signals, to OSD(On Screen Display) characters on the recognized screen coordinates.

Description

Caption display control method of television

The present invention relates to a method of controlling a caption display position in a television receiver having a caption function. Particularly, when an arbitrary caption is displayed, the display position is located near a corresponding speaker to improve learning efficiency during learning. A caption display control method for a television to be raised.

In general, as the society becomes more specialized, diversified and informatized, it is noticeable that a great deal of effort is put into the orientation of language ability. At the same time, modern people are under a lot of stress for a number of reasons, so they have a strong desire for language learning and a relatively small number of people who invest their time and effort.

Therefore, in order to meet the needs of modern people who want to get a chance to learn language without being stressed, a television program sends out a language other than that used by its own people in certain programs (e.g. movies). A technology for selectively using the same has been proposed, and when a user broadcasts in a language other than the language used by his or her citizen, a technology for improving the learning ability of the language while the user watches the subtitles by simultaneously transmitting the text has been proposed.

However, since the television having the caption function as described above is normally displayed in the form of OSD characters at the bottom of the screen irrespective of the speaker, the viewer should try to recognize the characters at the bottom of the screen while looking at who is speaking. The problem of poor yield occurred.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to display a caption display control method of a television for increasing learning efficiency during learning by placing a corresponding display position around a corresponding speaker when displaying any caption. To provide.

1 is a block diagram of a general television system

2 is a block diagram of a caption display control apparatus for a television to which the present invention is applied.

3 is an exemplary diagram for explaining a position of a signal for transmitting a display position of a caption in a broadcaster;

Figure 4 is an exemplary view of the position of the subtitle displayed on the screen according to the present invention

A feature of the present invention for achieving the above object is, in a caption display method in a television having a caption function, a corresponding text character must be displayed together with text character information associated with the caption in a predetermined section of a broadcast signal transmitted from a broadcasting station. A first step of transmitting position information, a second step of determining whether there is display position information of text characters in the broadcast signal received from the television receiver, and if it is determined that the position information exists through the second step, A third step of recognizing and reading the display position information and recognizing the coordinates of the display position of the subtitle, and a fourth step of displaying the text characters contained in the broadcast signal on the screen coordinates recognized through the third step as OSD characters. To include the steps.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

In general, a television receives a demodulated broadcast signal from a broadcasting station, demodulates it, and outputs it as a video signal and an audio signal through a CRT and a speaker. Such a general television has a caption display function, and the configuration and function of a general TV having the caption function as described above will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes an antenna, 2 denotes an RF amplifying unit for amplifying a radio frequency (hereinafter referred to as RF) signal received through the antenna 1, and 3 denotes an RF amplifying unit ( A first mixer for mixing the radio frequency signal output from 2) and the oscillation frequency signal output from the local oscillation circuit 17 to be described later and outputting an intermediate frequency signal (hereinafter referred to as IF) is shown.

Further, reference numeral 4 denotes an IF amplifier section for amplifying the intermediate frequency signal output from the first mixer 3, and 5 denotes an image intermediate frequency signal PIF in the intermediate frequency signal output from the IF amplifier section 4. And a P / S separator for separating the voice intermediate frequency signal SIF, and 6 represents a voice detector for detecting a voice signal from the voice intermediate frequency signal SIF output from the P / S separator 5. 7 denotes an image detector for detecting an image signal from an image intermediate frequency signal PIF output from the P / S separator 5.

In addition, reference numeral 8 denotes a remote control device that allows a viewer to select a desired channel or to select each mode of the television, that is, a TV / AV mode, and 9 denotes an infrared signal from the remote control device 8. 10 shows a receiver for converting a conventional code signal, 10 denotes a channel memory in which predetermined channel data is stored, and 11 denotes a microprocessor which controls the entire system in accordance with an input signal from the remote controller device 8.

In addition, reference numeral 12 denotes a screen display for overlapping and outputting a character or a picture on a screen on which a broadcast signal is output separately from the broadcast signal according to the control signal of the microprocessor 11 (On Screen Display). (Hereinafter referred to as OSD), and 13 denotes a PWM generator for generating a predetermined pulse width modulation (PWM) signal according to a control signal from the microprocessor 11, and 14 denotes the above. An integration circuit for integrating the PWM signal output from the PWM generator 13 to generate a predetermined level signal is shown.

In this case, when the viewer selects a predetermined channel using the remote controller device 8, the microprocessor 11 reads out channel data corresponding to the channel selected by the viewer from the channel memory 10 and then based on the selected channel. By controlling the PWM generator 13 to generate a predetermined PWM signal, the PWM signal is output as a voltage control signal corresponding to the channel selected by the viewer through the integrator circuit 14.

In addition, reference numeral 15 is provided for a precise tuning operation, and represents an Auto Fine Tunning circuit (hereinafter referred to as AFT) circuit 15, and 16 represents a voltage signal applied from the integrating circuit 14; An adder for adding a voltage signal applied from the AFT circuit 15 is shown, and 17 represents a local oscillating circuit for outputting a predetermined oscillation frequency.

In addition, reference numeral 18 controls the amplification degree of the above-described RF amplifier 102 and the IF amplifier 4 on the basis of the level of the image signal detected by the image detector 7, the image detector ( Figure 7 shows the Automatic Gain Control (AGC) circuit that controls the video signal output level from 7).

On the other hand, reference numeral 19 denotes an external AV device such as a VCR or a laser disc player, and 20 denotes the voice detector 6 and the image detector 7 according to the switching signal from the microprocessor 11 described above. A first switching section for selectively outputting audio and video signals from and external audio and video signals from the external AV device 19 is shown.

Although reference numeral 23 is not shown for the image signal output from the first switching unit 20, the color, tint, and brightness are in accordance with the control signal from the microprocessor 11. A video processing unit which processes (Brightness) and the like and outputs R (Red), G (Green), and B (Blue) signals corresponding to the video signal.

The RGB signal output from the image processor 23 is output by mixing RGB and OSD blanking signals Y ′, which are output signals of the OSD generator 12 described above, in the second mixer indicated by reference numeral 24. Reference numeral 25 denotes a CRT driving unit for driving the CRT based on the RGB signal output from the mixer 24.

In addition, reference numeral 21 denotes a base, treble, and volume according to a control signal from the microprocessor 11 although not shown for the voice signal output from the first switching unit 20. A voice processing unit for executing voice processing such as a volume), and 22 denotes a voice amplifying unit for amplifying and outputting the voice signal processed by the voice processing unit 21 to a speaker.

According to the conventional caption display control method for a television configured as described above, when the user selects the caption mode, the microcomputer enables the caption operation, and simultaneously extracts the caption signal (subtitle signal) from the caption broadcast signal obtained from the broadcasting station, and turns on the caption mode. The caption display is controlled by controlling the screen display unit.

When the caption display control device related to the caption function described above is briefly illustrated, as shown in FIG. 2, a remote controller or a key input device 100 for selecting a caption mode or inputting a channel change or volume-related function signal; The microcomputer 101 controls caption display control and volume output according to a function input from the remote controller or the key input device 100, and controls the overall operation of the TV, and audio according to the control of the microcomputer 101. An audio control unit 102 for outputting or performing a voice muting operation and an on-screen display unit 103 for controlling caption display or TV on-screen display under the control of the microcomputer 101.

A caption display control method through the animation technique according to the present invention in a television having such a caption function will be described with reference to FIGS. 3 and 4.

FIG. 3 shows a caption with channel information including a broadcast frequency, a broadcast channel, and a broadcast station name in a predetermined section of a broadcast signal transmitted from a broadcast station (for example, any horizontal line in a vertical blanking period). In addition to the associated text character information, the position information in which the text character should be displayed is transmitted.

At this time, the microcomputer 101 detects whether there is other caption position information in the caption from the received broadcast signal, and controls the on-screen display 103 accordingly, thereby surrounding the speaker's mouth as shown in FIG. Characters are displayed according to the animation technique.

The above-described series of control processes are performed as follows.

The microcomputer 101 determines whether there is display position information of text characters in the received broadcast signal. At this time, if it is determined that the position information exists, the caption display position information is detected and read to recognize the coordinates of the display position of the caption. If the location information does not exist, the OSD text corresponding to the text characters is displayed at the bottom of the screen through a normal process.

When the coordinates of the display position of the subtitles are recognized through the above-described process, the on-screen display unit 103 is controlled while displaying an image to display characters according to the animation technique around the speaker's mouth as shown in FIG. Is displayed.

As described above, by providing a caption display control method for a television according to the present invention, a viewer may naturally recognize a speaker and a text simultaneously while watching the screen without having to try to recognize a character at the bottom of the screen while looking at who is speaking. It works.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the claims. Anyone can see it easily.

Claims (1)

In the caption display method in a television having a caption function, A first step of transmitting position information on which the corresponding text characters should be displayed together with the text character information associated with the caption in a predetermined section of the broadcast signal transmitted by the broadcasting station; A second step of determining whether there is display position information for text characters in the broadcast signal received from the television receiver; A third step of detecting and reading caption display position information after recognizing the position information through the second step and recognizing the coordinates of the display position of the caption; And And a fourth step of displaying the text characters contained in the broadcast signal as OSD characters in the screen coordinates recognized through the third step.