KR870002733A - TV signal processing circuit - Google Patents

Abstract

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Description

TV signal processing circuit

Since this is an open matter, no full text was included.

1, 2 and 3 are all block diagrams showing the conceptual configuration of embodiments of a television signal processing circuit according to the present invention.

* Explanation of symbols for main parts of the drawings

2… … First signal processing circuit 3... … Second signal processing circuit 4, 48, 92, 112... … Switching circuit 7,54... … Judgment circuit 8, 9, 17, 20, 44, 52, 105, 106, 108, 109. … 10,64... … Motion detection circuits 11, 18, 31, 40, 45, 90, 104, 107, 120... … Addition circuit 14,39. … Line memory 15,80... … Frame memory 16, 19, 23, 26, 43, 81, 88... … Subtraction circuit 21, 32, 77, 84, 85. … Band pass filter 22,101,102,103... … Delay circuit 27,76,82,89... … Low pass filter 28,34,83,86,87,93... … Absolute circuit 29,91... … Conversion circuit 30,50... … Register 33,53... … Gate circuit 35. … Accumulation circuit 36. … Limit circuit 37,51... … Extraction circuit 41. … 1/2 counter circuit 42... … Feed memory 46,47... … Time compression circuit 60... … A / D converter 61. … Clock generation circuit 62. … Identification circuit 63. … YC separation circuit 65,67. … Scan line interpolation circuit 66. … Demodulation circuit 68,69... … D / A converter 70... … Matrix circuit 71. … Horizontal synchronous signal separation circuit 71. … Horizontal synchronous signal separation circuit 72. … Vertical synchronous signal separation circuit 73. … Display device 74,75,94... … Switch 65-1,65-2... … Signal processing circuit 110,111. … Memory 113,121... … D / A conversion circuit 114, 115, 122... … Synchronous isolation circuit 123. … Frequency double circuit

Claims (10)

A video signal input portion of a television signal, and an image memory having a delay time equal to a vertical scanning period of the television signal or an integer multiple thereof for at least one of separating the luminance signal and the color signal of the video signal or performing interpolation of the scanning line; A first signal processing circuit including a first circuit for performing a calculation and a second circuit provided in parallel with the first circuit without the image memory, an image display device, and an output of the signal processing circuit to the image display device. A second signal processing circuit for converting into a suitable signal, a deflection signal generator for acquiring horizontal and vertical deflection signals of the video display device, and an output of the first signal processing circuit if the television signal to be processed is not a standard color television system; Television means comprising a selection means for selecting an output of said second circuit. Circuit. 2. The apparatus according to claim 1, wherein said selecting means selects an output of said first circuit or said second circuit by a determination circuit that determines whether or not a television signal of said input unit is a standard color television signal. A television signal processing circuit comprising a switching circuit. 2. The apparatus according to claim 1, wherein said selecting means is to process a number generating circuit for generating a number corresponding to an operation of a video signal, and a multiplication circuit for multiplying the number to at least one of the outputs of the first and second circuits. And a coefficient control circuit for forcibly setting the coefficient value of the coefficient generation circuit output to a predetermined value when the television signal to be used is not a standard television signal. The television signal according to claim 1, wherein the video signal input unit has a clock signal generation circuit phase locked to a horizontal synchronization signal of an input television signal, and the clock signal is used as a clock signal of the first signal processing circuit. Processing circuit. The video signal input unit of claim 1, wherein the image signal input unit has a clock signal generation circuit phase locked to a color burst signal of an input color television signal, and the clock signal is used as a clock signal of the first signal processing circuit. TV signal processing circuit. 6. The apparatus of claim 5, wherein the first signal processing circuit comprises a digital circuit, and the input unit has an analog / digital converter for converting an input color television signal into a digital signal and applying the digital signal to the first signal processing circuit. And the two-signal processing signal has a digital / analog converter for converting the digital output signal of the first signal processing circuit into an analog signal. 2. The color television signal processing circuit according to claim 1, wherein the deflection signal generating section is configured to separate at least the horizontal synchronizing signal from the output of the first circuit of the first signal processing circuit. An input unit for converting a color television signal into a digital signal, a YC separation circuit that separates a luminance signal and a carrier color signal using a digital color television signal, which is an output of the input unit, as an input, and the output of the separation circuit is doubled. In a color television signal processing circuit having a scanning line interpolation circuit that changes into a signal and a display device for displaying an output signal of the scanning line interpolation circuit as an analog signal and displaying it on a display, the YC separation circuit comprises a frame of an input color television signal. And a first mixing circuit which mixes the second carrier color signal obtained by the first carrier color signal in-process processing obtained by the difference signal between the two to obtain a broadcast color signal in which the luminance signal is separated, and the scan line interpolation circuit directly inputs the input signal. The first compression circuit to compress, the signal averaged by the signal separated by one line period, and one mile A second mixing circuit for mixing signals obtained by averaging signals separated by a period, a second compression circuit for time-compressing the mixed interpolation signals, and outputting the first and second compression circuits horizontally scanning the input color television signal. A second switching color signal is output from the YC separation circuit, and the second compression circuit is separated from the one line period when the input television signal is a non-standard television signal. And a control means for inputting only a signal obtained by averaging the signals. 9. The color television signal processing according to claim 8, further comprising an operation detecting circuit for detecting an operation of an image from an input color television signal, wherein a ratio of the first and second mixing circuits is controlled by an output of the operation detecting circuit. Circuit. 9. The color television signal processing according to claim 8, wherein the YC separation circuit and the scan line interpolation circuit are constituted by digital circuits, and the digital circuits are operated by a clock signal phase locked by a color burst signal of an input color television signal. Circuit. ※ Note: The disclosure is based on the initial application.