H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/81
H04N 5/14 (2006.01) H04N 5/20 (2006.01) H04N 5/21 (2006.01)
Patent
CA 1216665
Abstract In a television receiver, a horizontal peaking signal produced by a peaking signal generator is added to a luminance signal to accentuate its horizontal detail. The peaking signal is subject to a coring action from a control voltage source with the amount of coring subject to dynamic control as a function of luminance signal content. The sense of coring control is such that a greater amount of coring is associated with dark portions of a scene to be reproduced than is associated with bright portions thereof. The coring control is non-linear and exhibits one control characteristic over a first range of luminance signal levels between a white image limit and a threshold level in the black image direction, and a different control characteristic over a second range of signal levels between the threshold level and the black image limit for restricting the amount of coring produced as the black limit is approached.
461559
Morneau Roland L.
Rca Corporation
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