H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/72
H04N 9/12 (2006.01) H04N 9/78 (2006.01)
Patent
CA 1247733
ABSTRACT OF THE DISCLOSURE Sampled signal generating apparatus formed by variable line delay circuits and dot delay circuits receives a series of sampled signal of a composite color television signal sampled in synchronism with a chrominance subcarrier at a frequency four times the chrominance subcarrier and generates simultaneously a sampled single at a specified sampled point for separating a luminance signal and a chrominance signal and sampled signals at four sampled points adjacent to the specified sampled point, namely, four sampled points on the upper, lower, right and left sides of the specified sampled point. A comparing and determining circuit compares and determines a direction in which there is little change in the picture, based on the sampled signals at the adjacent sampled points. Based on the results of the determination of the comparing and determining circuit, a selector selects and provides two sampled signals in a region where there is little change in the picture. A separation filter separates a chrominance signal from the sampled signal at the specified sampled point using the two sampled signals provided from the selector. A subtractor subtracts the chrominance signal from the sampled signal at the specified sampled point so as to provide a luminance signal.
492337
Murakami Tokumichi
Nakagawa Shinichi
G. Ronald Bell & Associates
Mitsubishi Denki Kabushiki Kaisha
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