KR100226105B1 - Method for controlling caption and osd in television - Google Patents

Abstract

The present invention is to provide a caption display control method of a television that maintains the caption display while performing the relevant operation when the volume related key is operated during the caption display. In particular, the display means 103 is provided in the display means 103. A first process of dividing the display character storage area into a caption character storage area and an OSD character storage area, and receiving caption broadcast in caption mode to interpret the corresponding caption data and then to the caption character storage area separated in the first process. A second process of storing, a third process of displaying on-screen display for captions using caption data stored in the caption character storage area in the second process, and a volume-related key when the caption on-screen display is operated. Storing data corresponding to the on-screen display characters corresponding to the keys in the OSD character storage area divided in the first step Is a fourth process for performing on-screen display using data stored in the OSD character storage area irrespective of the character data displayed in the fourth process and the third process. When it is operated, the caption on screen display state is kept intact, and the display position of the OSD character required by the user is different, thereby preventing the caption on screen from disappearing simultaneously with the display of the OSD character.

Description

How to control TV caption and OSD text display

The present invention is to maintain the caption display while performing the relevant operation when the volume related key is operated during caption display. In particular, the present invention stores data for display of characters to avoid redundancy between OSD and caption characters. It is intended to provide a caption and OSD character control method of the TV so that the display of the OSD character can be performed without collision when the caption function of the TV is separated by dividing the memory area. .

A typical television receives and demodulates a broadcast signal transmitted from a broadcasting station and outputs the demodulated signal as a video signal and an audio signal through a CRT and a speaker. A caption display function exists in such a general TV, and a configuration and function of a general TV having a caption function as described above will be described with reference to FIG. 1.

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 the 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.

In the general TV configured as described above, when the viewer selects the TV / AV mode by using the remote controller 8, the microprocessor 11 controls the switching unit 20 to control the voice detector 6. And by selectively outputting the video and audio signals from the video detector 7 or the video and audio signals from the external AV device 19 to the video processor 23 and the audio processor 21. Can watch the video and audio through the CRT and speakers of the TV.

In the TV operating as described above, in the conventional caption display control method, 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, The on-screen display is controlled to allow caption display.

If the TV on screen is displayed through the remote control or the key input device while performing the caption display as described above, the caption on screen display is turned off, the TV on screen display is operated to display the corresponding state, and when the set time elapses, Turn off the TV on screen and enable the caption on screen to control the caption display again.

However, the conventional caption-on-screen control method as described above frequently turns off the caption-on-screen and enables the TV-on-screen when the remote control or key input device is operated during the caption-on-screen. On / off of the caption on screen is repeated, there is a problem that the viewer does not properly understand the caption content.

In particular, when the TV on screen is displayed during the caption on screen, the caption on screen state is restored again after a predetermined time, so that the caption contents are not understood in the meantime. It will not be possible.

An object of the present invention for solving the above problems is to divide the memory area for storing the data for display of the character and then to separate the storage area of the caption character and OSD character to avoid the redundancy of the OSD character and caption character The present invention provides a method for controlling the caption of the television and the display of the OSD text so that the display of the OSD text can be performed without collision when performing the caption of the television.

1 is a block diagram of a general television system;

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

3 is a memory mapping example for explaining a caption and OSD character display control method of a television according to the present invention;

Explanation of symbols for the main parts of the drawings

100: remote control or key input device 101: microcomputer

102: audio control unit 103: on-screen display unit

A feature of the present invention for achieving the above object is a character display method in a television broadcast receiver having a caption function, having display means 103 for displaying arbitrary characters on a screen, wherein the display means ( The first process of dividing the display character storage area provided in 103 into a caption character storage area and an OSD character storage area, and receiving caption broadcasting in caption mode, interpreting the corresponding caption data, A second process of storing in the caption character storage area, a third process of performing on-screen display for captions using caption data stored in the caption character storage area in the second process, and a volume associated with the on-screen display of the caption When a key is manipulated, OSD corresponding to the on-screen display character corresponding to the key is divided in the first step. And a fourth process of storing the text in the text storage area and a fifth process of performing on-screen display using the data stored in the OSD text storage area regardless of the text data displayed in the third process.

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

2 is a block diagram of a caption display control apparatus for a television to which the present invention is applied. As shown therein, a caption display control according to a remote controller or key input device 100 for selecting a caption mode or inputting a channel change or volume related function signal, and a function input from the remote controller or key input device 100. And a microcomputer 101 for controlling the volume output and controlling the overall operation of the TV, an audio controller 102 for outputting audio or performing a voice muting operation under the control of the microcomputer 101, and the microcomputer ( And an on-screen display 103 for controlling caption display or on-screen display for TV under control of 101.

A caption and OSD character display control method for a television according to the present invention will be described with reference to FIG. 3 which illustrates a memory mapping area of the on-screen display 103 of a caption display control apparatus for a television to which the present invention configured as described above is applied. Is as follows.

First, if the memory for storing data corresponding to the character is 34 columns in 16 lines before displaying the character, it is divided into the upper region A and the lower region B, and the character data about the caption is the upper region. The text data related to the OSD is stored in the lower area (B).

At this time, preferably, the upper region A is set to 34 columns in 4 lines, and the lower region B is set to 34 columns in 12 lines.

Hereinafter, the operation according to the present invention will be described with reference to the memory mapping area as shown in FIG. 3. As is well known, when power is supplied to the system, the microcomputer 101 performs an initialization operation and then inputs a key. Search for. At this time, when the user selects a channel through the remote controller or the key input device 100, the microcomputer 101 controls a tuner (not shown) to tune the broadcast signal of the selected channel, and simultaneously performs audio / video processing and output unit. (Not shown) controls the audio and video of the corresponding channel.

If the user operates the caption mode key set on the remote controller or the key input device 100 while watching a general broadcast signal as described above, the microcomputer 101 enables the caption and receives the caption broadcast. Check. At this time, when caption broadcasting is received, caption data is extracted from the received caption broadcasting and analyzed. The interpreted caption data is stored in the screen display unit 103, but in a limited area indicated by reference numeral A in FIG. 3, and then caption display is performed through the screen display unit 103. FIG.

As described above, while performing caption display, the microcomputer 101 continuously searches for key input, and if a user performs a key operation through the remote controller or the key input device 100 during key input search, which key is operated. Check. At this time, if a key (for example, channel switching) that is not related to the volume is operated, the caption on screen display is turned off, the TV on screen display is performed, and after a predetermined time, the TV on screen display is turned off again. The caption on screen display is performed again.

On the other hand, if the volume-related keys (voice mute key, volume up / down key, multicast selection key, etc.) are operated, the text data corresponding to the OSD function requested by the user is attached while maintaining the on-screen display state of the current caption. After storing in the limited area indicated by reference numeral B in FIG. 3, the OSD display is performed through the screen display 103.

In other words, by dividing the area of the memory where the caption character data and the OSD character data are stored, two different character data can be simultaneously displayed on the displayed screen without collision.

As described above, according to the present invention, when a volume-related key is operated during caption-on-screen display, the caption-on and simultaneous display of the OSD-character is displayed because the display position of the OSD-character required by the user is different while maintaining the caption-on-screen display state. There is an effect that can prevent the screen from disappearing.

Claims (1)

A character display method in a television broadcast receiver having a caption function having display means 103 for displaying an arbitrary character on a screen, A first step of dividing the display text storage area provided in the display means (103) into a caption text storage area and an OSD text storage area; A second process of receiving a caption broadcast in the caption mode, analyzing the corresponding caption data, and storing the caption data in the caption character storage area classified in the first process; A third process of performing on-screen display for captions using caption data stored in the caption character storage area in the second process; A fourth step of storing data corresponding to the on-screen display character corresponding to the key in the OSD character storage area separated in the first step when the volume related key is operated when the caption on-screen is displayed; And And a fifth process of performing on-screen display using data stored in the OSD text storage area regardless of the text data displayed in the third process.

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