| 摘要 |
PROBLEM TO BE SOLVED: To obtain an image of high quality which is free from color shading, hue slippage and time lag by providing a difference calculation circuit which calculates the difference between the output of a minimum value detection circuit and the center of a burst discriminating pulse, a variable delay circuit which varies the delay of a Y or C signal, etc. SOLUTION: The low-pass filters(LPF) 9 and 10 filter the output of a decoding circuit 8 which converts the input color signals into the color difference. A minimum value detection circuit 11 detects the minimum value of a burst discriminating pulse of the output of a BGP generation circuit 6 from the outputs of the LPFs 9 and 10 and then outputs a position set in the pulse as the counter value. Each of difference calculation circuits 12 and 13 calculates the difference between the output of the circuit 11 and the center of a BGP. A variable delay circuit 14 varies the delay value of a Y or C signal that is separated by a Y/C separation circuit 4. Then the output timing of the circuit 6 and the delay value of the Y or C signal are varied according to the calculated difference value, so that an image of high quality having no color shading nor hue slippage, etc., is obtained.
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