KR19980069387A - Method for discriminating broadcast identification signal and device - Google Patents

Abstract

The present invention relates to a broadcast identification signal discrimination method and apparatus for properly loading and transmitting various types of identification code signals on an image signal and separating the transmitted ID signals without error. According to the type of program, the vertical synchronization signal of the composite video signal including the ID code signal set to a different number and the separate vertical synchronization signal are timing-matched, and the ID code signal of the composite video signal is detected in the timing matching state. The ID code signal is integrated and amplified to count the number of the ID code signals, and the type of the broadcast program is determined according to the count result.

Description

Method for discriminating broadcast identification signal and device

The present invention relates to an apparatus for transmitting / reproducing a broadcast identification signal and a method thereof, and more particularly, to a broadcast identification signal (ID code signal) carried at a predetermined timing during one vertical scanning period of a broadcast video signal. The present invention relates to a method and apparatus for determining a broadcast identification signal for transmitting with a timing interval so that the identification of the broadcast identification signal can be performed without error.

As is well known, various signal processing techniques have been introduced into video / audio signals constituting a broadcast program, so that viewers may use text multicasting by teletext signal or two-language broadcasting / stereo / mode / surround voice broadcasting. It is a state applied to practical use.

A television receiver receiving such a broadcast broadcast signal (i.e., an ID code signal) is added and transmitted at a predetermined timing during one vertical period. In the above, the ID code signal is automatically interpreted, for example, the on-screen display (OSD) signal or the LED display element is used to guide the text and / or voice multiple broadcasts. According to the guidance of the device, the viewer can acquire a variety of information or listen to various types of voices by appropriate selection of the text and / or voice multiple broadcasts.

FIG. 1 is a diagram schematically showing a general composite video signal transmitted by including an ID code signal representing a type of a broadcast program. In the vertical scanning period constituting one field of a video signal, one vertical synchronization signal 10 is shown. And a plurality of horizontal scanning periods forming a video signal of one field within the one vertical scanning period, followed by the vertical synchronization signal 10 to indicate an ID code signal and / or voice multiple broadcast. 14) will be included.

FIG. 2 is a diagram showing a main block of a television receiver which reproduces a composite video signal including an ID code signal shown in FIG.

In the figure, reference numeral 20 is in charge of the overall control of the television receiver and, upon detection of the ID code signal, performs the control to discriminate the ID code signal and to display the type of the broadcast program on the fly, for example, from a remote controller. A control unit which executes playback processing of character multiple broadcasting / voice multiple broadcasting corresponding to channel selection or ID code signal based on the signal.

22 denotes a tuner which performs tuning of the channel in response to tuning data VT of a specific channel applied from the controller 20, and 24 denotes a broadcast video / audio signal of a channel tuned by the tuner 22. An IF processor which processes an intermediate frequency (IF) is shown.

Reference numeral 26 denotes an image / audio IF signal processed by the IF processing unit 24 under the control of the control unit 20 in a text multiple / audio multiple manner to be reproduced by a CRT device / speaker device (not shown). 28 denotes a V processing unit, and 28 denotes an ID code signal ('14' in FIG. 1) included in the composite video signal (see FIG. 1) connected to the IF processing unit 24 and applied to the control unit 20. ID code detection unit.

In addition, 30 denotes the type of broadcast program corresponding to the ID code signal (e.g., character multiplexing and voice multiplexing) under the control of the control unit 20 that has determined the ID code signal detected by the ID code detecting unit 28. Display driving unit for driving the display unit 30 for visual display, wherein the display driving unit 30 is a display unit 30 indicating the type of broadcast program based on the configuration of the television receiver. In the case of a device, an OSD processing unit is employed, whereas when the display unit 30 is an LED display element, LED driving means is employed.

Therefore, referring to FIGS. 1 and 2, when a control signal for tuning a specific channel is input to the controller 20, the controller 20 transmits tuning data VT for the channel to be tuned to the tuner 22. The tuner 22 performs the tuning of a specific channel based on the tuning data VT so that the composite video signal of the channel is applied to the IF processing unit 14, and the IF processing unit 14 ) Performs IF conversion processing by the IF frequency on the composite video signal and applies it to the A / V processing unit 26.

In the meantime, the ID code detection unit 28 applies the detected ID code signal to the control unit 20 when the ID code signal 14 is detected in the composite video signal processed by the IF processing unit 14. The control unit 20 determines the ID code signal and controls the display driver 30 based on the determination result so that the display unit 32 uses the type of broadcast program corresponding to the ID code signal (eg, a character). Multicast or voice multicast).

According to the display of the display unit 30, when the viewer applies a control signal for selecting the character multicast or the voice multicast (2-language broadcast, stereo, surround, etc.) to the control unit 20, the control unit 20 The A / V processing unit 26 controls the A / V processing unit 26 to perform the reproduction processing of the character multiplex / voice multiplex method for the broadcast program.

However, according to the broadcast signal in the form of the composite video signal shown in FIG. 1, a plurality of types of ID code signals tend to be added according to the advancement of video / audio processing technology. As a result, it is difficult to accurately recognize the ID code signal.

That is, the ID code signal 14 is carried as digitalized information in the blanking section of the vertical scanning period, but when the sensitivity of the broadcast signal is reduced or ambient noise is mixed, it affects the level of the ID code signal. Accordingly, the ID code detection unit 28 applies the detection result of the error ID code signal to the control unit 20. Accordingly, an error control operation of the control unit 20 is executed, and the type of broadcast program irrelevant to the display unit 32 is visually displayed, and according to the error display, the viewer controls a signal for the type of the program. Even if is applied, selection of the type of the broadcast program is not made.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances. In the blanking section of the vertical scanning period of a composite video signal, the number of ID code signals representing the types of broadcast programs is loaded differently, and the ID code signals are detected at the timing of the vertical synchronization signal. It is an object of the present invention to provide a method and apparatus for discriminating a broadcast identification signal which enables accurate identification of an ID code signal.

In order to achieve the above object, according to a preferred embodiment of the present invention, an IF processing unit for IF processing a composite video signal of a channel tuned by a tuner, an A / V processing unit for reproducing the IF processed composite video signal, A television receiver comprising an ID code detection unit for detecting an ID code signal included in the composite video signal, a display driver for displaying the type of a broadcast program corresponding to the ID code signal, and a display unit. According to the timing synchronization of the vertical synchronization signal and the reference synchronization signal of the composite video signal including the ID code signal set to a different number, and detects the ID code signal of the composite video signal in the timing matching state, and the detected ID code signal Integrating and amplifying to count the number of the ID code signal to determine the type of the broadcast program according to the count result The broadcast identification signal detection method is provided.

According to another preferred embodiment of the present invention, an A / V processing unit which is tuned by a tuner and reproduces the composite video signal IF-converted by the IF processing unit, an ID code detecting unit detecting the ID code signal included in the composite video signal; And a display driver and a display unit for displaying the type of a broadcast program corresponding to the ID code signal, wherein the ID code detection unit is a timing of a composite video signal including the ID code signal and a predetermined reference synchronization signal. A synchronous matching processing unit for matching a signal, an ID code determination unit for detecting the ID code signal from the timing-matched composite video signal, an integrator for integrating the detected ID code signal, and an amplifier for amplifying the integrated ID code signal. And identification of the type of broadcast program by counting the ID code signal amplified by the amplifier by the control means. An apparatus for determining broadcast identification signal is provided.

According to the present invention having the above-described configuration, the number of ID code signals included in the composite video signal is set to a different number according to the type of broadcast program, and the predetermined reference synchronization signal is the same period as the vertical synchronization signal of the composite video signal. It is generated by the reference synchronous signal generation unit so as to have a number, and by counting by integrating / amplifying the number of the ID code signals, it is possible to accurately determine the ID code signals without errors.

1 is a view schematically showing a form in which an ID code signal as a broadcast identification signal is included in a general composite video signal;

2 is a schematic configuration diagram of a television receiver for separating an ID code signal from the composite video signal shown in FIG. 1;

3 is a schematic diagram illustrating a discrimination principle of a broadcast identification signal according to the present invention;

FIG. 4 is a block diagram illustrating an apparatus for determining a broadcast identification signal shown in FIG. 3.

* Description of the symbols for the main parts of the drawings *

50: control unit, 52: tuner,

54: IF processor, 56: A / V processor,

58: ID code detector, 60: display driver,

62: display unit, 64: reference synchronization signal generating unit,

66: synchronous matching processing unit, 68: ID code determination,

70: integrator, 72: amplifier.

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

3 is a diagram illustrating an example of a method of detecting an ID code included in a composite video signal and a form of the ID code according to a preferred embodiment of the present invention.

In one field of the composite video signal defined by the vertical synchronization signal 10 shown in Fig. 3A, a horizontal scanning period 12 is defined, and an ID code indicating the type of a broadcast program by the composite video signal. When the signal 14 is included, in the present invention, the ID code signal 14 is positioned at a timing synchronized with the vertical synchronous signal 10 and transmitted. When the ID code signal is detected, the vertical synchronous signal is transmitted. The ID code is detected only at the position matched with the timing (10) (see Fig. 3 (b)), whereby the correct ID code can be detected (see Fig. 3 (c)).

Here, according to the present invention, the ID code signal of FIG. 3 (c) is set to a different number (see FIGS. 3 (d) to 3 (f)), and the ID code signal is integrated to broadcast according to the integration level. It is preferable to determine the type of program.

FIG. 4 is a block diagram showing a broadcast identification signal processing apparatus according to the present invention configured to detect an ID code signal of the type described with reference to FIG. 3 to determine the type of a broadcast program, wherein reference numeral 50 denotes an entire television receiver. In addition to controlling, when the ID code signal is detected, the ID code signal is discriminated and the type of the broadcast program is displayed on the basis of control. For example, the channel selection or the ID code signal is based on the control signal from the remote controller. A control unit which executes the reproduction processing of the corresponding character multiplex / voice multiplex is shown.

Reference numeral 52 denotes a tuner for tuning the channel according to preset data (VT) of a specific channel in the control unit 50, and 54 denotes a broadcast video / audio signal of a channel tuned by the tuner 52 for an intermediate frequency (IF). Indicates an IF processing section to be processed. In addition, 56 is an A / V that processes the video / audio IF signal processed by the IF processor 54 in a text / audio multiple manner under the control of the controller 50 to be reproduced through a CRT device / speaker device. 58 denotes a processing unit, and 58 denotes an ID code signal ('14' in FIG. 3 (a)) included in the composite video signal (see FIG. 3 (a)) connected to the IF processing unit 54 to control the control unit ( An ID code detection unit applied to 50), and 60 denotes a visual display for the type of broadcast program (e.g., text multicast, voice multicast, etc.) corresponding to the ID code signal under the control of the control unit 50. A display driver for driving the display unit 62 is shown.

Preferably, the ID code detector 58 is a reference synchronous signal generator for generating a reference synchronous signal having the same period as the vertical synchronous signal 10 included in the broadcast signal for detecting the ID code signal described with reference to FIG. 64, the reference synchronization signal generated by the reference synchronization signal generator 64 (i.e., the signal having the same period as the vertical synchronization signal of the composite video signal) and the composite video signal processed by the IF processor 54. (See FIG. 3 (a)), the synchronization matching processing unit 66 for timing detection of the ID code signal, and the ID code signal (see FIG. c) and an ID code signal (for example, FIGS. 3 (d) to 3 (f) detected by the ID code judgment unit 68). Integrator 70 for integrating one ID code signal and amplifying the level of the integrated ID code signal (required And an amplifier 72 which is subjected to A / D conversion processing and applied to the controller 50. The controller 50 counts the amplified levels to determine the type of broadcast program (i.e., Based on a data table for identification of a broadcast program registered in the controller 50).

That is, referring to FIGS. 3 and 4, when a control signal for tuning a specific channel is input to the controller 50, the controller 50 may transmit tuning data VT for a channel to be tuned to the tuner. 52, the tuner 52 executes tuning of a specific channel based on the tuning data VT so that the composite video signal of the channel is applied to the IF processing section 54. In step 54), the IF signal is processed by the IF frequency on the composite video signal and applied to the A / V processing unit 56.

In the meantime, the ID code detection unit 58 detects the ID code signal from the composite video signal processed by the IF processor 14, and thus the composite video signal processed by the IF processor 14 (Fig. 3 (a). )) Is applied to the synchronization matching processing unit 66 to perform timing matching with the vertical synchronization signal generated by the reference synchronization signal generating unit 64 to detect an ID code in the composite video signal, and the timing matched composite image. The signal is applied to the ID code determination unit 68 to detect the ID code signal, and the detected ID code signal is applied to the integrator 70 and integrated.

The level of the ID code signal integrated in the integrator 70 is amplified by the amplifier 72 and applied to the control unit 70. Accordingly, the control unit 70 counts the level of the amplified ID code signal to identify the ID. The type of broadcast program corresponding to the code signal is determined.

The control unit 50 controls the display driver 60 based on the result of the identification of the ID code signal, and the display unit 62 controls the type of broadcast program corresponding to the ID code signal (for example, character multiplexing or Voice multicasting).

According to the display of the display unit 62, when the viewer applies a control signal for selecting the character multicast or the voice multicast (2-language broadcast, stereo, surround, etc.) to the control unit 50, the control unit 50 The A / V processing unit 56 controls the A / V processing unit 56 to perform the reproduction processing of the character multiplex / voice multiplex method for the broadcast program.

Meanwhile, the present invention is not limited to the above examples and various changes and modifications can be made within the scope not departing from the gist of the invention. For example, the number of the ID code signals can be increased or decreased as necessary, and the synchronous matching can be performed. The reference synchronization signal applied to timing matching with the composite video signal in the processing unit 66 is a vertical synchronization signal detection means for detecting the vertical synchronization signal of the composite video signal instead of employing a separate reference synchronization signal generator 64. It may be replaced.

As described above, according to the method and apparatus for discriminating a broadcast identification signal according to the present invention, by setting a different number of ID code signals in a composite video signal of a broadcast program, the result of integration / amplification of the ID code signal is counted and broadcasted. Since the type of the program is discriminated, not only the influence due to the mixing of noise is significantly reduced, but also the accurate ID code signal can be detected.

Claims (5)

An IF processing unit for IF processing the composite video signal of the channel selected by the tuner, an A / V processing unit for reproducing the IF processed composite video signal, and an ID code for detecting the ID code signal included in the composite video signal. A television receiver comprising a detector, a display driver for displaying the type of a broadcast program corresponding to the ID code signal, and a display. According to the type of the broadcast program, the timing synchronization of the vertical synchronization signal of the composite video signal including the ID code signal set to a different number and a separate reference synchronization signal is detected, and the ID code signal of the composite video signal is detected in the timing matching state. And counting the number of the ID code signals by integrating and amplifying the detected ID code signals to determine the type of the broadcast program according to the count result. The method of claim 1, wherein the predetermined reference synchronization signal has the same period as the vertical synchronization signal of the composite video signal. An A / V processor 56 for reproducing the composite video signal tuned by the tuner 52 and IF-processed by the IF processor 54, and an ID code detector for detecting the ID code signal included in the composite video signal. (58), and a television receiver comprising a display driver (60) and a display (62) for displaying a type of a broadcast program corresponding to the ID code signal, The ID code detection unit 58 synchronizes the timing of the composite video signal including the ID code signal with a predetermined reference synchronization signal, and the ID code signal from the timing matched composite video signal. An ID code determination unit 68 for detecting, an integrator 70 for integrating the detected ID code signal, and an amplifier 72 for amplifying the integrated ID code signal, and amplifying in the amplifier 72. And identifying the type of the broadcast program by counting the received ID code signal by the control means (50). The apparatus of claim 3, wherein the number of ID code signals included in the composite video signal is set to a different number according to the type of broadcast program. 4. The apparatus of claim 3, wherein the predetermined reference synchronization signal is generated by a reference synchronization signal generator (64) to have the same period as the vertical synchronization signal of the composite video signal.