Video hue correction taking account of saturation and luminance
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United States of America Patent
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-
Jan 25, 1994
Grant Date -
N/A
app pub date -
Feb 28, 1992
filing date -
Feb 28, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A digital color television signal has its chrominance component, which is in the form of color difference signals, resolved into color hue and color saturation signals which are used to address a function memory which provides a pair of correction signals that are supplied to calculator circuits which respectively receive the color hue signal, the color saturation signal and the luminance signal as well as predetermined control signals previously stored which relate to the color sectors adjacent to the color sector in which the color hue signal is located. The calculation circuits respectively supply corrected color hue, color saturation and luminance signals. The color hue signal is additively corrected by a color hue correction signal and the color saturation signal is multiplicatively corrected by a saturation correction signal.
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