H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/62
H04N 9/78 (2006.01)
Patent
CA 1115412
RCA 72,017 SUPPRESSION OF LUMINANCE SIGNAL CONTAMINATION OF CHROMINANCE SIGNALS IN A VIDEO SIGNAL PROCESSING SYSTEM Abstract of the Disclosure Apparatus in a video signal processing system for improving the quality of a reproduced color image by reducing visible "cross-color" interference caused when high frequency luminance signals occur within the passband of the chrominance component of the video signal. Video signals within the chrominance passband are sensed by a signal multiplier responsive to the video signal and to the video signal delayed by a given amount. The amount of delay corresponds to an interval during which rapid lumi- nance transitions capable of producing the high frequency signals within the chrominance passband can occur. The multiplier generates a control signal indicative of the presence of the luminance transitions, which is then utilized for controlling the chrominance signal processing channel such that objectionable cross-color effects otherwise visible in a reproduced image are reduced or eliminated.
317439
Morneau Roland L.
Rca Corporation
LandOfFree
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