KR100223783B1 - Caption display period delay apparatus for television - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a caption display period delay processing apparatus for a television which allows a display display period for a caption signal extracted from a luminance signal included in a video signal of a television broadcast to be arbitrarily displayed by a user's adjustment operation.

To this end, the present invention provides a caption signal detection unit 14 for detecting a caption signal from a video signal of a television broadcast tuned by the tuner 2 and an external video signal input from an external video playback device by the external video input unit 4. In a equipped television, a signal delay means (20) for delaying and outputting a caption signal detected by the caption signal detector (14) for a predetermined period and a delay period for adjusting a signal delay value for the signal delay means (20). An adjustment value arbitrarily adjusted by the key operation of the adjustment means 22, the key setting means for arbitrarily adjusting the signal delay period for the screen display of the caption signal, and the function setting means 24; Corresponding to the caption signal by the control means 32 for adjusting and controlling the signal delay value of the signal delay means 20 via the delay period adjustment means 22 and the key operation of the function setting means 24.OSD signal processing means (34) for generating OSD display information for displaying a random adjustment state of the signal delay period.

Description

Delay processing device for TV caption display period

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a delay processing apparatus for caption display period of a television. More particularly, a caption display of a television can be added to arbitrarily delay a screen display period of a caption signal extracted from a video signal of a television broadcast to increase convenience in viewing. A period delay processing apparatus.

In general, in a television for receiving a television broadcast signal transmitted through a plurality of television stations in the form of airwaves and playing a video / audio, a color signal and a luminance signal are properly synthesized in a video format such as the National Television System Committee (NTSC) method. The desired broadcast channel can be tuned and reproduced for the broadcast signal to be transmitted. For such broadcast signal, intermediate frequency conversion and amplification are performed after the tune for the synthesized signal of the color signal and the luminance signal. After luminance signal adjustment and color demodulation process, it is synthesized into RGB signal and reproduced on the CRT (Cathode Ray Tube) screen by interlaced scanning.

On the other hand, according to the video signal of the television broadcast, such as a foreign language conversation program or a foreign movie program, such as a program for which the screen display of the corresponding character is required so that the caption signal having a caption character to the brightness signal of the video signal can be synthesized. The caption broadcasting system is adopted, and on the television side, by extracting the caption signal from the video signal of the television broadcast, the corresponding caption character can be displayed or canceled in response to a user's arbitrary operation.

However, in the caption broadcasting method of the television broadcasting, the caption characters can be displayed or displayed by user's arbitrary operation. However, the caption characters can be used for a certain period in order to expand the understanding of the contents of each caption character. Since the delay display function is not provided, there is a disadvantage in that the knowledge and learning effect of the broadcast contents are halved.

Accordingly, the present invention has been made in view of the above circumstances, and it is possible to arbitrarily display a screen display period for a caption signal extracted from a luminance signal included in a video signal of a television broadcast by an adjustment operation of a user. An object of the present invention is to provide a caption display period delay processing apparatus.

According to the apparatus for processing a caption display period of a television according to the present invention for achieving the above object, a caption is obtained from a video signal of a television broadcast tuned by a tuner and an external video signal input from an external video playback device by an external video input unit. A television having a caption signal detection unit for detecting a signal, comprising: a signal delay unit for delaying and outputting a caption signal detected through the caption signal detection unit for a predetermined period and a delay period adjustment for adjusting a signal delay value for the signal delay unit; Means for performing a key operation for arbitrarily adjusting a signal delay period for the screen display of the caption signal, and mediating the delay period adjusting means in response to an adjustment value arbitrarily adjusted by a key operation of the function setting means. Control means for adjusting and controlling the signal delay value of the signal delay means; Provides a delay period of a television caption processing unit is configured to provided the OSD signal processing means for generating an OSD display information for displaying the screen, an arbitrary adjustment state of the signal delay of the caption signal by a key operation of the information means.

According to the present invention configured as described above, when a predetermined display delay period is set for a caption signal detected from a luminance signal of a television broadcast through a key operation of a remote controller or a control panel by a user, the caption signal is previously displayed. By delaying the screen by the set signal delay period, the learning effect or content familiarity with a specific broadcast program such as a foreign language learning program or a foreign movie program can be doubled.

1 is a block diagram showing a caption display period delay processing apparatus of a television according to the present invention;

2 is a diagram illustrating an example in which a state of adjusting a caption delay time is displayed on the screen according to an exemplary embodiment of the present invention;

3 is a flowchart illustrating the operation according to the preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2: tuner, 4: external video input,

6: image IF unit, 8: image amplifier unit,

10: color signal processing unit, 12: luminance signal processing unit,

14: caption signal detection unit, 16: video synthesis unit,

18: video output section, 20: signal delay section,

22: delay period adjustment section, 24: function setting section,

32: control unit, 34: OSD signal processing unit.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a caption display period delay processing apparatus for a television according to the present invention. In the apparatus of the present invention, reference numeral 2 denotes a channel channel for selecting a predetermined broadcast channel from the control unit 32, which will be described later. A tuner which receives data and tunes an RF signal of a corresponding broadcast channel, performs high frequency amplification, mixes it with a local oscillation frequency signal generated by the channel tuning data, and converts the signal into an intermediate frequency signal.

Also, reference numeral 4 denotes an external video input unit which receives an external video signal from an external video playback device such as a video tape recorder which is responsible for playing back a video recording medium such as a video tape.

Reference numeral 6 denotes an image IF unit for intermediate frequency amplifying a television broadcast signal selected from the tuner 2 or an external image signal received through the external image input unit 4, and 8 denotes the intermediate frequency amplification process. And an image amplifying unit for amplifying a video signal or an external video signal of a television broadcast up to an amplification level required for video signal processing.

Reference numeral 10 denotes a color signal processor for performing color demodulation with a color synchronizer based on the color subcarrier signal by detecting a burst signal and restoring a color subcarrier signal with respect to the signal amplified video signal. A luminance signal processing section which performs luminance adjustment and contrast adjustment on a luminance signal separated from a signal amplified video signal.

Further, reference numeral 14 denotes a caption signal detection unit for detecting a caption signal having the information character of the broadcast program from the luminance signal from the luminance signal processing unit 12, and 15 denotes an image from the image amplifier 8 By extracting the vertical / horizontal synchronous signal by separating the composite synchronous signal from the signal, the burst signal detection of the color signal processing unit 10 and the luminance processing of the luminance signal processing unit 12 and the caption detection of the caption signal processing unit 14 are performed. A synchronization separator for outputting as synchronization information.

Further, reference numeral 16 outputs an RGB signal by combining the color signal from the color signal processing unit 10 and the luminance signal from the luminance signal processing unit 12 in a matrix manner, and from the caption signal processing unit 14. An image synthesizer for synthesizing and outputting a caption signal, wherein the caption signal applied through the image synthesizer 16 is input by being delayed for a predetermined signal delay period by the signal delay unit 20 described later.

Reference numeral 18 denotes an image output unit which performs amplification driving on the R.G.B signal and the caption signal synthesized through the image synthesis unit 16 and outputs the scanable image on the CRT screen.

Reference numeral 20 denotes a signal delay unit which delays the caption signal detected by the caption signal detection unit 14 for a preset signal delay period and outputs the signal to the image synthesis unit 160, and 22 denotes a control unit 32 which will be described later. A delay period adjustment unit that performs a process of adjusting the signal delay period for the signal delay unit 20 by adjustment control by "

Also, reference numeral 24 is a matrix button unit provided in a remote control unit for remote control or a control panel predetermined portion of the main body, and is a key for adjusting the signal delay value of the screen display period for the caption signal of the television broadcast or the caption signal from an external video signal. As a function setting unit for performing an operation, the function setting unit 24 includes a caption mode key 26 for keying execution of a caption display mode for screen display of the extracted caption signal, and a caption signal under the caption display mode. Up / down operation of the caption delay key 28 for setting the execution of the signal delay function, the adjustment key 29 for inputting the execution key for adjusting the signal delay period under the caption delay function, and the signal delay period of the caption signal. Is configured to include, for example, a period input key 30 that is adjusted in units of seconds.

Reference numeral 32 denotes a control unit which performs execution control on the overall functional operation of the television according to the key operation of the function setting unit 24, and the control unit 32 is captioned by the function setting unit 24. In addition to performing OSD display control for displaying a state in which a signal delay value for a signal is adjusted, PWM is provided to the delay period adjustment unit 22 in response to the signal delay adjustment value adjusted by the function setting unit 24. By applying the modulation control signal in the form of modulation, the signal delay period for the signal delay unit 20 is adjusted and controlled.

Also, reference numeral 34 denotes an OSD signal processing unit for generating OSD display information for displaying a state of adjusting the signal delay period of the caption signal by the function setting unit 24 by display control of the control unit 32. In addition, the OSD signal processor 34 allows an OSD display character such as, for example, caption delay period adjustment, to be displayed on the screen to indicate an execution state of the caption delay time adjustment function as shown in FIG. 2, and to adjust the signal delay period. The status is displayed in seconds, for example 2.5 seconds.

Next, the operation of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 3.

First, in the state where the main power of the television is turned on in step 40 to tune the television broadcast signal of the broadcast channel including the caption signal through the tuner 2, the caption mode key 26 of the function setting unit 24 is pressed. When the caption display mode is operated and the caption display mode is set, the caption signal detection unit 14 synchronizes with the synchronization information of the vertical / horizontal synchronization signal extracted by the synchronization separation unit 15, and the luminance from the luminance signal processing unit 12 is reduced. The caption signal is detected from the signal, and the detected caption signal is synthesized by the image synthesizing unit 16 with the RGB signal obtained by combining the color signal from the color signal processing unit 10 and the luminance signal from the luminance signal processing unit 12. It is displayed through a predetermined screen area of the CRT screen.

In that state, the control proceeds to step 41, and the control unit 32 determines whether or not the caption delay key 28 of the function setting unit 24 is being operated for setting the caption delay function.

As a result of the determination in step 41, if it is determined that the caption delay key 28 of the function setting unit 24 is being operated, the control proceeds to step 42 and the control unit 32 advances the delay period adjusting unit 22 in advance. By applying an adjustment control signal in the form of PWM modulation having a set signal delay value, the signal delay unit 20 determines the caption signal from the caption signal detection unit 14 under the delay period adjustment of the delay period adjustment unit 22. The signal is delayed during the signal delay period and output to the image synthesizing unit 16, and the caption signal combined with the RGB signal by the image synthesizing unit 16 is delayed by a predetermined period on the CRT screen. Is displayed.

At this time, in step 43, it is determined whether or not the adjustment key 29 of the function setting unit 24 is being operated for the adjustment of the caption delay period.

As a result of the determination in step 43, when it is determined that the adjustment key 29 of the function setting unit 24 is being operated, the control proceeds to step 44, and the OSD signal processing unit 34 is displayed and controlled as shown in FIG. As shown in the figure, the period input key 30 of the function setting unit 24 is key operated to display the signal delay period to be adjusted in seconds, and when the adjustment key 29 is keyed again, adjustment is performed in seconds. As the updated signal delay period is updated and set, control returns to step 42 to apply the PWM modulation type adjustment control signal corresponding to the update delay period set to the delay period adjusting unit 22, and the signal delay unit The signal delay period for the caption signal of (20) can be delayed by the update value.

However, if it is determined in step 43 that the adjustment key 29 of the function setting unit 24 is not operated, the control proceeds to step 45 and the caption delay key 28 of the function setting unit 24 is determined. ) Is keyed again to release the caption delay function.

As a result of the determination in step 45, when it is determined that the caption delay key 28 of the function setting unit 24 is being keyed again, the control proceeds to step 46 and the signal delay operation for the signal delay unit 20 is performed. The caption signal from the caption signal detector 14 can be displayed on the screen synchronously in the normal caption display period.

According to the present invention made as described above, the screen display for the caption signal of the television broadcast in the television with the display function of the caption character can be displayed by delaying the screen display for a predetermined delay period, foreign language learning program or foreign movie program In addition to improving the learning effect for the broadcast program that requires a caption, such as has the advantage that the understanding can be doubled.

Claims (1)

In a television equipped with a caption signal detector (14) for detecting a caption signal from a video signal of a television broadcast tuned by the tuner (2) and an external video signal input from an external video playback device by the external video input device (4), A signal delay means 20 for delaying and outputting a caption signal detected by the caption signal detection unit 14 for a predetermined period; A delay period adjusting means 22 for adjusting a signal delay value for the signal delay means 20, Function setting means (24) for performing a key operation for arbitrarily adjusting the signal delay period for the screen display of the caption signal; Control means 32 for adjusting and controlling the signal delay value of the signal delay means 20 via the delay period adjustment means 22 in response to the adjustment value arbitrarily adjusted by the key operation of the function setting means 24; And, And an OSD signal processing means (34) for generating OSD display information for displaying an arbitrary adjustment state of a signal delay period for a caption signal by a key operation of said function setting means (24). Delay processing device for the caption display period.

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