KR940004603Y1 - Apparatus for generating mosaic picture for tv receiver - Google Patents

Abstract

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Description

Circuitry mosaic tv screen

Circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

LED1: Light emitting element PD1: Light receiving element

10 tuner 20 frequency converter

31: AUDIO DETECTOR

32: AUDIO PROCESSOR

35: AMP 36: Speaker

41: video detector (VEDEO DETECTOR)

42: luminance signal processor 43: chromatic signal processor

45: amplifier 46: CRT (CATHODE RAY TUBE)

51: REMOCON 52: PRE AMP

53: received signal processing IC 54: MICOM

55: Keypad 60: Switching IC

70: mosaic generator

The present invention displays a mosaic screen on the whole screen when an unwanted scene (violence, sex, etc.) is broadcasted so that the viewer (especially a child) mosaics the TV screen so that the viewer cannot recognize the contents of the screen. It is about a circuit.

In the conventional design, when a screen that the viewer does not want comes out, the screen is mosaic by using the PIP (PICTURE IN PICTURE) function.

In other words, when several people are watching TV, when a screen that the viewer does not want or a screen that should not be seen comes out, the PIP function is moved and displayed as a mosaic screen, but the entire screen cannot be mosaicized.

As a result, when a family (eg, adults, children, etc.) watched TV together, they often felt embarrassed.

In this case, the mosaic screen divides a broadcast signal, which is not a normal broadcast screen, into horizontal and vertical checker boards, and displays only one pixel representing adjacent pixels among pixels included in one block. You can tell a certain thing about the screen that you can't know.

Accordingly, an object of the present invention is to provide a circuit that prevents the viewer from recognizing the content of the screen by displaying the entire screen as a mosaic screen when a scene (violent, sex, etc.) that the viewer does not want comes out.

The present invention for performing the above object is that the output of the remote control or keypad, the video and audio carriers input to the tuner is converted into a video and audio intermediate frequency in the frequency converter and the audio intermediate frequency of the frequency converter is only the audio signal in the audio detector In the television circuit is detected and output as an audio signal through a speaker, the intermediate frequency of the frequency converter is applied to the video detector to detect only the video signal and the video signal is output to the CRT through the luminance and chroma signal processor, mosaic screen A signal input unit having a mosaic key to set the generation, a microcomputer that recognizes a mosaic screen generation key input and outputs a switching control signal, and outputs the video detector to a luminance and chroma signal processor or a mosaic generator using the switching control signal of the microcomputer. Switch to output By processing the video signal of the selected video detector in the switching IC and the switching to the video signal IC for the mosaic screen it is characterized by consisting of a mosaic generator for outputting a luminance and chrominance signal processor.

This will be described in detail with reference to the accompanying drawings.

When the tuner 10 selects one channel by the remote controller 51 or the keypad 55, the video carrier carrying the video signal of the channel transmitted from the broadcasting station and the audio carrier carrying the audio signal are connected to the input circuit of the tuner 10. It is input through a high frequency amplification circuit of the tuner 10 is amplified.

The video and audio carriers output from the high frequency amplification circuit of the tuner 10 are mixed with the local oscillation frequencies output from the local oscillation circuit, thereby generating a new frequency due to the difference between the video and audio carriers and the local oscillation frequency.

That is, the frequency converter 20 outputs an intermediate video and audio frequency due to the difference between the video and audio carrier and the local oscillation frequency.

An audio detector 31 which detects a voice signal at a voice intermediate frequency of the frequency converter 20 is connected to the frequency converter 20, and the audio signal of the audio detector 31 is processed by the audio processor 32 so that an amplifier ( When applied to the 35, the amplifier 35 amplifies the applied audio signal to operate the speaker 36.

In addition, a brightness signal processor 42 for connecting a video detector 41 for detecting a video signal including a synchronization signal at an image intermediate frequency of the frequency converter 20 and processing a brightness signal among the video signals of the video detector 41 is performed. And a chroma signal processor (43) for processing chroma signals to process luminance and chroma signals and output an image to the CRT (46) at the output of the luminance and chroma signal processors (42) (43). 45 to amplify the output of the luminance and chroma signal processors 42 and 43.

Looking at the configuration for mosaicing the screen that the viewer does not want, the remote control 51 is provided with a key of the mosaic generating mode that can mosaic the screen, and the control signal output from the remote control 51 for the transmission of the remote control 51 When the signal is transmitted through the light emitting diode LED1, the receiving signal is received by the receiving port diode PD1 of the preamplifier 52 and applied to the preamplifier 52 to amplify and receive the applied received signal from the preamplifier 52. Is applied to the signal processing IC 53.

The control signal of the remote controller 51 applied by the reception signal processing IC 53 is converted into a control signal capable of operating the microcomputer 54 and applied to the microcomputer 54.

At this time, the microcomputer 54 performs the switching operation of the switching IC 50 to the output of the keypad 55, which is composed of the control signal transmitted from the remote controller 51 and the television set, and has a setting mote key capable of mosaicing the screen. Control.

In the configuration of the switching IC 60, if the mosaic generating mode key is not operated on the remote controller 51 or the keypad 55, the video signal of the video detector 41 is directly transmitted to the luminance and chroma signal processors 42 and 43. When the mosaic generating mode key of the remote controller 51 or the keypad 55 is operated, the video signal of the video detector 41 is applied to the mosaic generator 70 to convert the video signal of the video detector 41 into the video signal for mosaic generation. To the output.

When the switching IC 50 is operated in the microcomputer 54 by the output of the remote controller 51 or the keypad 55, the switching IC located between the video detector 41 and the luminance and chroma signal processors 42 and 43 ( 60 processes the video signal of the video detector 41 through the mosaic generator 70 in the luminance and chroma signal processors 42 and 43 to output the video signal through the CRT 46 to view the mosaic screen.

Here, the mosaic generator 70 outputs the video signal for the mosaic signal as an input of the output video signal of the video detector 41, and the inside thereof has a digital converter for converting the input video signal into a digital signal and a memory for storing the digital converted signal. The controller consists of a controller that reads a part of the signal stored in memory and an analog converter that converts the read signal into an analog signal.

That is, the screen is displayed as a mosaic screen by converting the video signal into digital data from a digital converter, storing it in a memory, reading it partially from the controller, converting it into full screen data, and outputting it through an analog converter.

Based on the above-described drawings will be described an embodiment of the present invention in detail.

First, when a broadcast to be watched by the keypad 55 or the remote controller 51 is tuned on the TV itself, the input circuit of the tuner 10 receives a video and audio carrier carrying video and audio signals of the tuned channel.

The received projection carrier and voice carrier are amplified by the high frequency amplifying circuit of the tuner 10 and applied to the frequency converter 20. The video and audio carriers applied to the frequency converter 20 are mixed with the local oscillation frequency of the local oscillation circuit to output the video intermediate frequency and the audio intermediate frequency.

The audio intermediate frequency output from the frequency converter 20 is applied to the audio detector 31 to detect only a voice signal and process the same in the audio processor 32 to output an audio signal through the speaker 36. In step 35, the audio signal is amplified and applied to the speaker 36.

In addition, the image intermediate frequency output from the frequency converter 20 is applied to the video detector 41 to detect only the image signal and apply it to the luminance and chroma signal processors 42 and 43.

The luminance signal of the image signal applied by the video detector 41 is processed using the luminance signal processor 42, and the chromaticity signal of the image signal applied by the video detector 41 is processed using the chroma signal processor 43. The luminance and chromaticity signals output from the luminance and chromaticity signal processors 42 and 43 are amplified by the amplifier 45 and applied to the CRT 46 so that they can be outputted as images through the CRT 46.

When watching the tuned broadcast as a voice signal and a video signal through the speaker 36 and the CRT (46) when the unwanted screen comes out of the mosaic when you see the screen to the mosaic operation when the screen to the mosaic comes out the remote control 51 When the control signal of the remote controller 51 is transmitted through the light emitting diode LED1 by operating the mosaic generating mode key in the control panel, the control signal is received from the receiving photodiode PD1 and applied to the preamplifier 52. The signal is amplified by the preamp 52.

The amplified control signal is converted into a control signal capable of operating the microcomputer 54 in the reception signal processing IC 53 and applied to the microcomputer 54.

In the microcomputer 54, the switching IC 60 is controlled by the control signal of the applied remote controller 51 or the control signal output from the keypad 55 of the television itself.

When the switching IC 60 selects the mosaic generator 70 as the control signal of the microcomputer 54, the video signal output from the video detector 41 is applied to the mosaic generator 70 via the switching IC 60.

The mosaic generator 70 divides an input signal into dozens of blocks and outputs a video signal for a mosaic screen by processing one pixel to be represented by one pixel among a plurality of pixels included in one block.

In other words, the mosaic generator 70 converts the video signal into digital and stores it in the memory, and then divides the data stored in the memory into several blocks in the form of a checkerboard, and then continuously reads data for one pixel of the separated block data. Output video signal for mosaic screen.

The video signal for the mosaic screen output from the mosaic generator 70 is applied to the luminance and chroma processors 42 and 43 which are amplified by the amplifier 45 to output the mosaiced image through the CRT 46.

In the commercial television broadcasting, the audio signal is very minutely irritating than the video signal of the television screen, and thus the audio signal is output as it is while mosaicing the video signal.

In this case, a low pass filter (LPF) may be used instead of the mosaic generator 70.

Using the low pass filter, the entire screen is very blurred instead of the mosaic screen, so that the same effect as using the mosaic generator 70 can be obtained.

As described above, the present invention can effectively hide a scene that a young child or the like should not see when watching TV by outputting the entire screen that the viewer does not want, and can eliminate the sense of embarrassment.

Claims (1)

The video and audio carrier waves input from the tuner 10 by the output of the remote controller 51 or the keypad 55 are converted into the video and audio intermediate frequencies by the frequency converter 20, and the audio intermediate frequencies of the frequency converter 20 are audio. Only the audio signal is detected by the detector 31 and output through the speaker 36, and the video intermediate frequency of the frequency converter 20 detects only the video signal by the video detector 41 and the luminance and chroma signal processor 42. In the television circuit outputted to the CRT 46 through 43, the remote control 51 and the keypad 55 are provided with a key for generating a mosaic screen, and the switching control signal is output by recognizing the key input for generating the mosaic screen. And a video signal that is switched by a switching control signal of the microcomputer 54 and applied to the luminance and chroma signal processors 42 and 43 by the video detector 41. A switching IC 60 is applied to the zigzag generator 70. The video signal selected by the switching IC 60 is digitally converted into a block of a predetermined area, and the image signal of one block is read into only one pixel. And a mosaic generator (70) for outputting a video signal for screen generation and applying it to a luminance and chroma signal processor (42) (43).