KR19980078737A - How to control caption display on TV - Google Patents

Abstract

The present invention is to provide a caption display control method of the television to maintain the caption display while performing the relevant operation when the volume-related key is operated during the caption display, in particular, caption broadcasting according to the user's caption mode selection Caption display process for receiving the on-screen display for captions by interpreting the caption data; A first caption display control process of turning off the caption on screen display and performing a TV on screen display for a predetermined time when a key not related to the volume is operated during the caption on screen display; When the volume-related key is manipulated during the caption on-screen display, a second caption display control process is performed to perform only an operation corresponding to a key operated while maintaining the caption display state.

Description

How to control caption display on TV

An object of the present invention is to provide a caption display control method of a television that maintains a caption display while performing a related operation when a volume related key is operated during caption display.

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.

SUMMARY OF THE INVENTION An object of the present invention is to provide a caption display control method for a television that maintains the caption display while performing the corresponding operation when the volume related key is operated during caption display.

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 flowchart showing a caption display control method for 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

Features of the present invention for achieving the above object, the caption display process for receiving the caption broadcast according to the user's caption mode selection and caption data to interpret the caption on-screen display, and the volume during the on-screen display for the caption A first caption display control process of turning off the caption on screen display when an unrelated key is operated and performing a TV on screen display for a predetermined time; and when the volume related key is operated when the caption on screen is displayed, the screen displays a caption display. And a second caption display control process of maintaining a state and performing only an operation corresponding to a key operated.

As an additional feature of the present invention for achieving the above object, the first caption display control process may further include automatically restoring the caption on screen state after a predetermined time after displaying the TV on screen.

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.

3 is a flowchart showing a caption display control method for a television according to the present invention. As shown therein, a step (S1) of determining whether to operate a caption mode, a step (S2) of checking whether a caption broadcast is received, a step (S3) of analyzing the received caption data, and the analyzed caption data Controlling the on-screen display for captions (S4), checking whether or not a key is pressed (S5), checking whether a volume is a key related to key input (S6), and a key other than the volume related key. When the screen is turned off and performing the on-screen display for the TV for a predetermined time (S7-S9), and performing the operation while maintaining the on-screen display for the caption when the volume-related key operation ( S10-S11).

When the caption display control method according to the present invention made as described above is described in detail with reference to Figures 2 and 3 as follows.

As is well known, when power is supplied to the system, the microcomputer 101 searches for key input after performing an initialization operation. 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.

As described above, when the user operates the caption mode key set on the remote controller or the key input device 100 to watch the caption broadcast while watching the general broadcast signal, the microcomputer 101 enables the caption (S1) and the caption broadcast. Check whether the reception (S2). At this time, when caption broadcast is received, caption data is extracted from the received caption broadcast and interpreted (S3). Then, the caption display is controlled by controlling the on-screen display unit 103 according to the analyzed caption data (S4).

As described above, while performing the caption display, the microcomputer 101 continuously searches for key input (S5), and when a user performs a key operation through the remote controller or the key input device 100 during key input search, any key is pressed. Check whether the operation (S6). At this time, if a key that is not related to the volume is operated, the on-screen display for the caption is turned off (S7), the TV-on-screen display is performed (S8), and after a predetermined time, the TV-on-screen display is turned off (S10). In operation S11, caption on screen display is performed again.

On the other hand, if the volume related key (voice mute key, volume up / down, multicast selection key, etc.) is operated in step S6, the user requests while maintaining the on-screen display state for the caption which is the current on-screen state. By controlling only the audio control unit 102 to control the voice (S10) (S11).

In other words, when the volume related key is operated in the on-screen state for the caption, only the voice is controlled as required by the user while maintaining the on-screen state for the caption.

This prevents the caption from disappearing by the user's volume-related key manipulation during the caption on screen.

As described above, in the present invention, when a volume-related key is operated during caption-on-screen display, the caption-on screen is satisfied while controlling the voice required by the user while maintaining the caption-on-screen display state. It has the effect of preventing it from disappearing.

Claims (2)

A caption display process of receiving caption broadcasting and interpreting caption data according to a user's caption mode selection to perform on-screen display for captions; A first caption display control process of turning off the caption on screen display and performing the TV on screen display for a predetermined time when a key not related to the volume is operated during the caption on screen display; And And a second caption display control process of performing only an operation corresponding to a key operated while maintaining a caption display state when the volume related key is operated when the caption on-screen display is operated. The method of claim 1, wherein the controlling of the first caption display further comprises automatically restoring the caption on screen state after a predetermined time after displaying the TV on screen.