H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/18, 350/38
H04N 5/14 (2006.01) H04N 5/91 (2006.01) H04N 5/911 (2006.01)
Patent
CA 1117647
ABSTRACT OF THE DISCLOSURE Video signal processing circuitry for compensating a video signal having different average levels in alternate hori- zontal line intervals, such as in odd and even line intervals during a field or frame interval. A first average detector is operable during alternate ones of the line intervals, for example, during odd line intervals, for detecting the average level of the video signal in such alternate line intervals. A second average detector is operable during the remaining ones of the line inter- vals, for example, during the even line intervals, for detecting the average level of the video signal in such remaining line inter- vals. A compensating circuit is responsive to the difference between the detected average levels of the video signal in the alternate and remaining line intervals, respectively, for producing compensating signals. These compensating signals are combined with the video signal so as to minimize the difference between the aver- age level of the video signal in successive line intervals. -i-
310275
Hirai Jun
Numakura Toshihiko
Gowling Lafleur Henderson Llp
Sony Corporation
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