Video data correction capable of exactly correcting hue,...

Details Video data correction capable of exactly correcting hue,... Video data correction capable of exactly correcting hue,...

2006-10-17

2006-10-17

Kostak, Victor R. (Department: 2622)

Television

Image signal processing circuitry specific to television

Hue control

C348S654000

Reexamination Certificate

active

07123308

ABSTRACT:
An angle calculation unit calculates an angle formed by color difference signals R-Y, B-Y of each input pixel. Correction gain calculation units use the angle as a parameter to generate correction gains of hue, chroma, luminance (Y) gamma, and chroma (C) gamma for only correction regions. Accumulators accumulate the respective correction gains. In a circuit including from a multiplier (10) to a multiplier (18), the color difference signals R-Y, B-Y are multiplied by the correction gains of hue and chroma to correct the hue and chroma. A luminance/color difference gamma processing unit uses a correction function and correction gains of Y, C gammas to gamma-correct a luminance signal Y and color difference signals R-Y, B-Y.

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