摘要 |
PURPOSE:To make dot disturbance reduceable, by properly using a luminance signal/ chrominance component separation filter depending upon the correlation between pictures in the vertical and horizontal directions of composite color TV signals. CONSTITUTION:Delaying means 5a and 5b which can simultaneously obtain a notable sampling point, at which luminance signals and chrominance components are to be separated from each other, and sampling points close to the sampling point by delaying an inputted sampling signal and a picture correlation deciding means 7 which respectively detects the picture correlation in both vertical and horizontal directions from the values of the notable sampling point and close sampling points and decides the correlation of pictures, are provided. In accordance with the decided results, the output of a horizontal-direction filter 6b, vertical-direction filter 6a, or horizontal-vertical- direction filter 6c is used as the chrominance component output of a luminance signal/ chrominance component separation filter. Therefore, the influences of the leakage of luminance signals and chrominance components to mutual channels in an area where pictures extensively change can be reduced and dot disturbance can be reduced.
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