| 摘要 |
A chroma signal is supplied to a comb-filter for eliminating noise component in the chroma signal. The output signal of the comb-filter and the input chroma signal are both supplied to a correlation circuit. The correlation circuit outputs the same signal as the output of the comb-filter when the input chroma signal and 1H delayed chroma signal have line correlation between each other. The correlation circuit further outputs the same signal as the input chroma signal at the front end portion of the chroma signal and outputs nothing at the back end portion, though the comb-filter output trails 1H delay signal at the back end portion thereof.
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