KR100292495B1 - Television transmitter and receiver and control method thereof for selecting and controlling television look and listen of minority - Google Patents

Abstract

PURPOSE: A device for transmitting/receiving TV broadcasting which selectively controls the viewing of an under-aged viewer and a control method thereof are provided to prevent under-aged people from viewing television by multiplexing warning message with broadcasting signals without changing a broadcasting transmitter at all. CONSTITUTION: A device for transmitting/receiving TV broadcasting which selectively controls the viewing of an under-aged viewer includes a transmitter(300) for transmitting multiplexed warning messages for viewing-exhibited programs by RF signals, a tuner(302) for selecting a channel from the RF signal and converting the selected channel to an intermediate frequency signal, an image detecting part(303) for detecting an image signal from the intermediate frequency signal to separate a composite image signal, an image recognition part(304) for searching the warning messages from the composite image signal to output the existence of the warning messages, a microcomputer(307) for outputting control signals for determining operations of respective parts according to the existence of the warning messages, an image control part(306) for transmitting the input image signal to a CPT according to the control signal of the microcomputer, an image message output part(308) for outputting a stored images message signal according to the control signal, a sound detecting part(311) for detecting a sound signal from the intermediate frequency signal, a sound control part(313) for transmitting the sound to a speaker according to the control signal of the microcomputer, and a sound message output part(314) for outputting a stored sound message signal to the speaker under the control of the microcomputer.

Description

TELEVISION TRANSMITTER AND RECEIVER AND CONTROL METHOD THEREOF FOR SELECTING AND CONTROLLING TELEVISION LOOK AND LISTEN OF MINORITY}

The present invention relates to a TV transceiver for controlling a minor TV viewing to prevent a minor from watching a program that cannot be viewed by a minor, and a method of controlling the same. The present invention relates to a TV transmission and reception device for selectively controlling a minor TV viewing so that the TV receiver identifies that the program being broadcast is a program that cannot be viewed by a minor, and is displayed only when an ID signal is input from the outside. .

With the flood of video media like this, public opinion about the regulation of violence, sensational scenes and contents is rising.

This trend is embodied in North America (US, Canada) where technical and institutional measures are being taken to remove unhealthy images of violence and indecentness from the home.

This is an integrated circuit called a V chip (Violence Chip).

This is a system that prevents the video from appearing on TV screens when it receives images that you do not want to show to young children.

In Korea, such a system does not use the North American system, but a simple warning message (18 in the right corner) The program is sent from start to finish so that it appears on the receiving screen.

Looking at the technical configuration and the operation according to the operation as described above are as follows.

1 is a block diagram of a conventional TV transmission and reception apparatus. As shown in FIG. 1, a video encoder 101 for encoding and outputting an image taken by a camera and a minor viewing program are classified into a warning message. A video editing unit 102 for multiplexing and outputting the video of the video encoder 101 so as to be displayed on a part of a TV reception screen, a voice encoder 105 for encoding and outputting audio for the video taken by the camera, and the video. Mixer 103 for mixing the video output from the editing unit 102 and the audio output from the audio encoder 105 to convert a high frequency (RF) signal in accordance with the broadcast standards and transmits through the transmission antenna 104, and the A tuner that receives a high frequency (RF) signal transmitted through the transmission antenna 104, receives the signal through the reception antenna 106, and converts the signal into channel channel and intermediate frequency signals. 107, and an image detector 108 for detecting and outputting a composite video signal for detecting and processing an image signal from the intermediate frequency signal output from the tuner 107, and the separated composite video signal. Converts the signal into a signal for display on the TV screen 115 and outputs the power to be driven by the CPT 114, and generates a signal provided by the image processor 110. The driving unit 112 displayed on the 114, the voice detector 109 for separating and outputting the voice signal from the intermediate frequency signal output from the tuner 107, and the voice signal to the speaker 113 The audio processing unit 111 converts and outputs the audio signal synchronized with the output image.

And, Figure 2 is a block diagram of a conventional TV-mounted TV transmission and reception device, as shown in the video encoder 201 for encoding and outputting the image taken by the camera, and in the signal format promised with the TV receiver A V chip encoder 202 for multiplexing and outputting current program level information by using a part of the vertical blanking section of the video signal, and an audio encoder 205 for encoding and outputting audio for the image taken by the camera; The mixer 203 for mixing the video output from the V chip encoder 202 and the audio output from the audio encoder 205 and converting the image into a high frequency (RF) signal conforming to a broadcast standard and transmitting the same through a transmitting antenna 204. And a tuner 207 which receives a high frequency (RF) signal transmitted through the transmission antenna 204 through the reception antenna 206 and converts the signal into a channel selection and intermediate frequency signal and outputs the signal. ), An image detector 208 for separating and outputting a composite video signal for detecting and processing an image signal from the intermediate frequency signal output from the tuner 207, and the composite image signal separated in the TV. Image processing unit 210 converts the signal for display on the screen and outputs the program grade information from the image signal output from the image detector 208 and compares with the rating information of the pre-entered consumer, the corresponding control A V chip decoder 215 for outputting a signal, an image controller 216 for controlling an image provided by the image processor 210 according to a program level according to a control signal output from the V chip decoder 215, and CPI A power source capable of driving the tee 214 and outputting a signal provided by the image controller 216 to the Citity 214 and outputted from the tuner 207. Is composed of a voice detector 209 for separating and outputting a voice signal from an intermediate frequency signal, and a voice processor 211 for converting the voice signal into a voice signal synchronized with an output image to the speaker 213 and outputting the voice signal. .

Referring to the prior art configured as described above in detail.

The video encoder 101 encodes an image taken by a camera of a broadcasting station according to the TV transmitter's standard and outputs the image to the image editing unit 102.

Accordingly, the video editing unit 102 distinguishes a minor viewing impaired program so that a non-viewing program displays a warning message (a form in which the number 18 is cheap) on a part of the TV screen, and displays a warning message on the video encoder 101. It is multiplexed to the video signal of and supplied to the mixer 103.

At this time, the audio encoder 105 encodes the audio for the image taken by the camera of the broadcasting station and supplies it to the mixer 103.

Then, the mixer 103 mixes the video output from the video editing unit 102 and the audio output from the audio encoder 105 and converts the video into a radio frequency (RF) signal conforming to the broadcast standard. The signal is transmitted to the TV receiver through the transmission antenna 104.

After the transmitted signal passes through the TV receiver, a warning message is displayed on a part of the screen on the TV screen 115.

Looking at the display process, the receiving antenna 106 receives a radio frequency (RF) signal transmitted from the transmitter and supplies it to the tuner 107.

The tuner 107 converts the channel tuner and the intermediate frequency signal into an image detector 108 and an audio detector 109, respectively.

Then, the image detector 108 detects the image signal from the intermediate frequency signal, separates the baseband composite image signal for image processing, and outputs the image signal to the image processor 110, and the audio detector 109 outputs the intermediate frequency signal. After the voice signal is separated from the baseband voice signal, the voice signal is output to the voice processor 111.

The image processor 110 converts the baseband composite image signal into a signal (R.G.B signal, horizontal and vertical synchronization signals, etc.) for displaying on the TV screen and sends the signal to the Citiity driver 112.

Accordingly, the Citiity driver 112 generates power to drive the Citi 114 and displays the signal provided by the image processor 110 on the Citi 114.

Meanwhile, the voice processor 111 outputs the baseband voice signal provided by the voice detector 109 to the speaker 113.

When the image is displayed on the TV screen 115 in this manner, a warning message indicating that the child cannot be viewed is displayed on a part of the screen.

2, the video encoder 201 encodes an image taken by a camera of a broadcasting station according to the TV transmitter's standard and outputs the video to the V chip encoder 202.

Accordingly, the V chip encoder 202 multiplexes information on program grades promised to each other on the broadcast side and the receiver side in a vertical blanking section in which the video signal is not loaded among the composite video signals and outputs the result to the mixer 203. .

At this time, the audio encoder 205 encodes the audio for the image taken by the camera of the broadcasting station and supplies it to the mixer 203.

The mixer 203 synthesizes an image output from the V chip encoder 202 and an audio output from the audio encoder 205 and converts the image into a high frequency (RF) signal conforming to a broadcast standard and receives the signal through the transmission antenna 204. To the side.

Then, when the receiving antenna 206 of the receiving side is received and provided to the tuner 207, the tuner 207 tunes a channel to be tuned, and converts the tuned high frequency (RF) signal into an intermediate frequency signal to make an image. Output to the detector 208 and the voice detector 209, respectively.

The image detector 208 detects the image signal from the intermediate frequency signal provided by the tuner 207, and separates the baseband composite image signal for image processing to the V chip decoder 215 and the image processor 210. Each voice detector 209 detects a voice signal among the intermediate frequency signals provided by the tuner 207, and separates the baseband voice signal and outputs the voice signal to the voice processor 211.

Accordingly, the image processor 210 converts the input baseband composite video signal into a signal for displaying on a TV screen and outputs the signal to the image controller 216. The voice processor 211 converts the received baseband audio signal into a speaker. The signal 113 is converted into an audio signal capable of driving the signal 113 so that a signal synchronized with the output image is output to the speaker 113.

In this case, the V chip decoder 215 finds program grade information multiplexed in the vertical blank period of the composite video signal output from the image detector 208.

When the program rating information thus found is compared with the rating information of the pre-entered consumer, and judged as a program that cannot be viewed by a minor, a control signal for preventing an image from being displayed is output to the image controller 216.

Accordingly, the image controller 216 does not provide the image signal to the Citiity driver 212 so that the image is not displayed when a control signal for preventing the display is provided from the V chip decoder 215.

Then, the Citiity driver 212 does not drive the Citiity 214.

However, in the prior art as described above, the warning message currently being sent by domestic broadcasts is only a warning, so that the minor can watch at any time if he or she minds, so it is too weak to prevent the minor from watching TV, North American V chip Compared to the above, there is no standard for program grade in Korea, and the signal procedure is complicated, which is a great burden for both the transmitting side and the receiving side.

Therefore, an object of the present invention for solving the conventional problems as described above is to allow minors to watch only when there is a specific ID (ID) signal to protect the minor from unhealthy scenes such as violence, pornography, etc. The present invention provides a TV transceiver and a control method thereof for selectively controlling minor TV viewing.

Another object of the present invention is to transmit the current warning message in the broadcasting station without multiplexing the transmitter but multiplexing the broadcast signal, and if the receiver simply finds the warning message in the broadcast signal, it does not output the video and audio currently input. The present invention provides a TV transmitting and receiving device and a control method thereof for selectively controlling a minor TV viewing so as to output a video and an audio so as to prevent a minor from watching violent material, a sensational scene, and the like.

1 is a block diagram of a conventional TV transceiver.

Figure 2 is a block diagram of a conventional TV chip mounted transceiver.

3 is a block diagram of a TV transmission and reception apparatus for controlling selection of a minor TV viewing of the present invention.

4 is a detailed block diagram of an image recognition unit in FIG. 3.

FIG. 5 is an explanatory diagram showing an example for setting a warning message section in FIG. 3; FIG.

FIG. 6 is an explanatory diagram showing binary data sliced and a pattern before being sliced in the data slicer in FIG. 4; FIG.

7 is an operation process diagram for a control method of a TV transceiver for controlling selection of a minor TV watching of the present invention.

Explanation of symbols on the main parts of the drawings

101: video encoder 102: video editing unit

103: mixer 105: voice encoder

300: transmitter 302: tuner

303: image detection unit 304: image recognition unit

306: image control unit 307: microcomputer

308: video message output unit 309: Citiity driver

310: Citi 311: voice detector

313: voice control unit 314: voice message output unit

315: Speaker

The present invention for achieving the above object is a multiplexing warning message to the video taken by the camera multiplexing the warning message, and the transmitter and the transmitter to convert and transmit the multiplexed video and audio by converting into a radio frequency (RF) signal that meets the broadcast standards; And a tuner for tuning a channel from the high frequency (RF) signal, converting the tuned channel into an intermediate frequency signal, and detecting a video signal from the intermediate frequency signal output from the tuner to separate the composite video signal. Operation of each part depending on whether there is an alarm message provided by the image detector, a warning message from the composite video signal output from the image detector, and outputting the presence or absence of a warning message. A microcomputer for outputting a control signal for determining whether or not, and the image detector according to the control signal of the microcomputer And a video control unit for transmitting or not transmitting the video signal to the Citi drive unit, a video message output unit for outputting a pre-stored video signal for the message according to the control signal of the microcomputer, and the tuner. A voice detector which detects and outputs a voice signal among intermediate frequency signals, a voice controller which transmits or does not transmit a voice signal output from the voice detector according to a control signal of the microcomputer, and a control signal of the microcomputer The voice message output unit for outputting a pre-stored voice signal for the message according to the speaker.

The present invention is a first step of checking whether there is a warning message from the video and audio detected composite video signal, and if there is no warning message, if there is a warning message without video and audio control, it is checked whether a consumer password is registered. A second step of outputting the video and audio without performing video and audio control if the password is registered; and a third input image if the password is not registered in the second step. And a fourth step of outputting a warning message image and audio without outputting audio.

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

FIG. 3 is a block diagram of a TV transceiver for selecting and controlling a minor TV viewing of the present invention. As shown in FIG. 3, a minor viewing program is multiplexed with a video taken by a camera and multiplexes a warning message. And tune the channel from the high frequency (RF) signal transmitted from the transmitter 300 to the transmitter 300 by converting the signal into high frequency (RF) signals in accordance with the broadcast standard, and intermediate the selected channel. A tuner 302 for converting into a frequency signal, an image detector 303 for detecting a video signal from an intermediate frequency signal output from the tuner 302, and separating a composite video signal; and the video detector 303 The video recognition unit 304 to find out the warning message from the composite video signal output from the) and output the presence or absence of the warning message, and whether or not the warning message provided by the image recognition unit 304 Accordingly, the microcomputer 307 for outputting a control signal for determining whether each part is operated, and the image processor 305 for converting and outputting a composite image signal output from the image detector 303 into a signal for display on a TV screen. ), An image control unit 306 that does not transmit or transmit the image signal transmitted from the image processing unit 305 to the safety driver 309 according to the control signal of the microcomputer 307, and the microcomputer 307. The video message output unit 308 outputs a video signal for a message stored in advance to the Citiity driver 309 and the audio signal of the intermediate frequency signal output from the tuner 302. A voice detector 311, a voice processor 312 for converting and outputting a voice signal output from the voice detector 311 into a signal for output to the speaker 315; According to the control signal of the chromocomputer 307, the voice controller 313 which transmits or does not transmit the signal output from the voice processor 312 to the speaker 315, and the control signal of the microcomputer 307 in advance The voice message output unit 314 outputs the stored voice signal for the message to the speaker 315.

As shown in FIG. 4, the image recognition unit 304 separates horizontal and vertical synchronization signals from an input composite video signal, generates a synchronization signal and generates a clock signal in synchronization with the video signal, and generates a clock. The horizontal and vertical timing signals for determining the horizontal and vertical positions of the video signal by using the horizontal and vertical synchronous signals and the clock signals output from the synchronous separation and clock generator 401 are output. Horizontal and vertical positioning unit 403 for recognizing a warning message section determined by using a timing unit 402, timing signals output from the horizontal and vertical timing unit 402, and the synchronization and clock generation unit. A data slicer 404 for outputting digital data obtained by slicing an image signal at a predetermined level of a clock provided by the 401, and the digital data output from the data slicer 404. The data comparator 405 takes only the value of the section designated by the horizontal and vertical position designation unit 403, and compares and compares it with the warning message previously designated in the memory 406, and outputs it to the microcomputer 307. .

FIG. 7 is a flowchart illustrating a method for controlling a TV transceiver for selecting and controlling a minor's TV viewing according to the present invention. As shown in the drawing, a first message for checking whether there is a warning message from a composite video signal detected from an image and a voice is shown. Step S702, and if there is no warning message in the first step (S702), the second step (S703) to check whether the consumer password is registered if there is a warning message without the video and audio control, and the second step ( If the password is registered in S703, the third step (S704) (S707) of outputting the currently received video and audio without performing the video and audio control, and if the password is not registered in the second step (S703) A fourth step (S705) 706 is performed to output the video and audio for warning message without outputting the video and audio currently input.

Referring to the operation and effect of the present invention configured as described in detail as follows.

The video encoder 101 of the transmitter 300 encodes an image taken by a camera of a broadcasting station in accordance with the TV transmitter's standard and outputs the image to the image editing unit 102.

Accordingly, the video editing unit 102 distinguishes a minor viewing impaired program so that a non-viewing program displays a warning message (a form in which the number 18 is cheap) on a part of the TV screen, and displays a warning message on the video encoder 101. It is multiplexed to the video signal of and supplied to the mixer 103.

At this time, the audio encoder 105 encodes the audio for the image taken by the camera of the broadcasting station and supplies it to the mixer 103.

Then, the mixer 103 mixes the video output from the video editing unit 102 and the audio output from the audio encoder 105 and converts the video into a radio frequency (RF) signal conforming to the broadcast standard. The signal is transmitted to the TV receiver through the transmission antenna 104.

Then, the tuner 302 of the TV receiver tunes a channel among the high frequency (RF) signals received through the reception antenna 301, and converts the high frequency (RF) signal for the tuned channel into an intermediate frequency signal to detect the image. 303 and voice detector 311 are respectively output.

The image detector 303 detects the image signal from the intermediate frequency signal, separates the composite image signal therefrom, and outputs the composite image signal to the image recognition unit 304 and the image processor 305, respectively.

The image processor 305 converts the composite image signal output from the image detector 303 into a signal that can be displayed on the Citi 310 and outputs the signal to the image controller 306, and the image recognizer 304 In the composite video signal output from the image detector 303, a warning message (for example, 18) is found in a section in which a warning message is found, and it is compared with the contents stored in the memory in advance to determine whether there is a warning message. Determination is made and sent to the microcomputer 307.

In this case, when the voice detector 311 detects a voice signal from the intermediate frequency signal output from the tuner 302 and outputs the voice signal to the voice processor 312, the voice processor 312 outputs the voice signal to the speaker 315. The signal is converted into a possible signal and output to the voice controller 313.

The microcomputer 307 analyzes a signal output from the image recognition unit 304 and a password registered by the consumer in advance.

As a result of analysis, if there is no warning message, the microcomputer 307 sends a signal not to control the video control unit 306 and the voice control unit 313, and the video message output unit 308 and the voice message output unit 314 Send a control signal that does not operate.

Then, the image controller 306 transmits the image signal processed by the image processor 305 to the Citiity driver 309 to display the image transmitted from the transmitter 300 on the Citi 310, the voice control unit 313 outputs the voice signal processed by the voice processor 312 to the speaker 315.

If there is a warning message, the microcomputer 307 determines whether the password of the consumer is registered, and if so, displays the current received signal on the screen without controlling the video and audio, such as when there is no warning message. If the password is not registered, a signal for controlling the video control unit 306 and the voice control unit 313 is transmitted, and a control signal for operating the video message output unit 308 and the voice message output unit 314 is transmitted.

Then, the image controller 306 operates to prevent the image signal processed by the image processor 305 from being transmitted to the Citiity driver 309, and the voice controller 313 receives the audio signal processed by the voice processor 312. It is not transmitted to the speaker 315.

At this time, the video message output unit 308 outputs a pre-stored video message to the Citiity driver 309, and the voice message output unit 314 is a pre-stored voice message, for example, the current program is viewed by a minor. Since it is a non-program, a command for selecting another channel is output to the speaker 315.

The Citiity driver 309 outputs a separate image output from the video message output unit 308 to the Citi 310 to be displayed.

In the case of violence or sensational scenes as described above, minors are not allowed to watch, and in the case of non-minor, they can be viewed only when a password of a pre-registered consumer is input.

Referring to FIG. 4, the operation of the image recognition unit 304 outputs a composite image signal separated by the image detection unit 303, and then synchronizes and clocks the generation unit of the image recognition unit 304. 401 and data slicer 404 are input.

The synchronous separation and clock generator 401 separates the horizontal synchronous signal and the vertical synchronous signal from the composite video signal, and also generates a clock signal that is synchronized with the video signal. The data slicer 404 and the horizontal and vertical timing unit ( 402).

Then, the horizontal and vertical timing unit 402 generates a timing signal for determining the vertical and horizontal positions from the video signal by using the horizontal synchronous signal, the vertical synchronous signal, and the clock signal to the horizontal and vertical position designator 403. The horizontal and vertical position designation unit 403 outputs a signal (a start point and an end point of horizontal and vertical positions) for recognizing an image section (alert message section) determined using the timing signal. To occur).

In this case, the data slicer 404 slices the composite video signal output from the image detector 303 for each predetermined level of the clock output from the synchronization separation and clock generator 401, and thus data of ″ 0 ″ or ″ 1 ″. And output the data to the data comparator 405.

Accordingly, the data comparator 405 takes only the value of the section designated by the horizontal and vertical position designation unit 403 among the digital data values output from the data slicer 404 and outputs the data output from the memory 406 (that is, for a warning message). Digital data) and outputs the result to the microcomputer 307.

The memory 406 analyzes the warning message sent from a broadcasting station in advance to determine whether there is a warning message among the input video signals, and stores the digital message as a digital data value according to the system of the present invention. The data value is output whenever there is a data output request.

Then, referring to the process of setting the warning message section based on Figure 5, in the horizontal and vertical timing unit 402 and the horizontal and vertical positioning unit 403 of Figure 4 first start point (C time) and end point ( D time) and set the start point (A time) and the end point (B time) horizontally.

FIG. 6 shows an example of binary data shapes of the data slicer 404 and the memory 406 of FIG. 4, when O, 1, and 8 are sampled 5 clocks horizontally 7 lines vertically in the data slicer 404. The corresponding binary data is shown.

Such binary data is also stored in the memory 406.

Referring to the process of FIG. 7 again based on the operation process of FIG. 7, the image detection is carried out from the input intermediate frequency signal first (S701).

If there is a video signal, the composite video signal is separated therefrom and output.

Then, it is checked whether or not there is a warning message among the separated composite video signals (S702).

As a result of the check, if there is no warning message, video and audio control is not performed (S704). If there is a warning message, it is checked whether the consumer's password is registered. (S703)

If the consumer's password is registered in the above, without video and audio control, and outputs the video and audio currently input to the TV antenna (S704),

If the consumer's password is not registered, the video and audio control is performed to output the video and audio input through the current reception antenna (S705). Instead, the video and audio for the pre-stored warning message are output. (S706) (S707)

As a result, if there is a warning message in the broadcast signal, it controls the actual video and audio so that the minor cannot watch.

Therefore, in the present invention, when a broadcast station multiplexes the current warning message without transmitting a transmitter using the current broadcast system and multiplexes the broadcast signal, the receiver simply finds the warning message in the broadcast signal and does not output the current video and audio. In addition, it is possible to output a warning message video and audio so that the inexperienced minors can not watch the violence, sensational scenes and the like.

Claims (3)

The program cannot be watched by a minor in the video taken by the camera. The transmitter multiplexes a warning message, and converts the multiplexed video and audio into a radio frequency (RF) signal that meets the broadcast standard and transmits the radio signal. A tuner that tunes a channel and converts the tuned channel into an intermediate frequency signal, an image detector that detects an image signal from the intermediate frequency signal output from the tuner, and separates a composite image signal, and the image detector The image recognition unit detects the warning message from the composite video signal output from the image output unit and outputs the presence or absence of a warning message, and outputs a control signal for determining whether each unit operates according to the presence or absence of the warning message provided by the image recognition unit. The CPC drive the video signal output from the video detector according to the microcomputer and the control signal of the microcomputer. A video controller for transmitting or not transmitting a video signal, a video message output unit for outputting a pre-stored video signal for a message according to a control signal of the microcomputer, and an audio signal of an intermediate frequency signal of the tuner; A voice detector for transmitting a voice signal output from the voice detector according to a control signal of the microcomputer to or from a speaker, and a voice signal for a message previously stored according to the control signal of the microcomputer. TV transmitting and receiving device for selecting and controlling a minor TV viewing, characterized in that the voice message output unit for outputting to the speaker. 2. The apparatus of claim 1, wherein the image recognition unit separates horizontal and vertical synchronization signals from the input composite image signal, and generates and outputs a clock signal in synchronization with the image signal. Horizontal and vertical timing unit for generating and outputting a timing signal that can determine the horizontal and vertical position of the image signal using the horizontal and vertical synchronization signal and the clock signal output from the unit, and the timing signal output from the horizontal and vertical timing unit A horizontal and vertical positioning unit for recognizing a warning message section determined by using a data slicer, a data slicer for outputting digital data obtained by slicing an image signal at a predetermined level of a clock provided by the synchronous separation and clock generator, and Among the digital data output from the data slicer, it is designated by the horizontal and vertical positioning unit. The TV transceiver for selecting and controlling a minor TV viewing, comprising a data comparator configured to take a value of a section and compare and determine a warning message predetermined in a memory and output it to a microcomputer. A first step of checking whether there is a warning message from the composite video signal detected from the video and audio; and a second step of checking whether a consumer password is registered if there is a warning message without the video and audio control if there is no warning message; If the password is registered, the third step of outputting the video and audio currently received without the video and audio control, and if the password is not registered in the second step does not output the current video and audio And a fourth step of outputting a video and an audio message for warning message.