Method and apparatus requiring fewer number of look-up tables fo

Details Method and apparatus requiring fewer number of look-up tables fo Method and apparatus requiring fewer number of look-up tables fo

1997-06-10

1999-10-05

Peng, John K.

Television

Format conversion

Specified chrominance processing

348661, 345150, 345154, 345199, 358520, 358523, 358518, 382167, H04N 701, G03F 308

Patent

active

059632631

ABSTRACT:
In a method and apparatus for converting digitized luminance-chrominance color space signals to digitized RGB color space signals, a first combining unit generates a plurality of predetermined linear combinations of the chrominance color space signals received by a multiplexed multiplication unit which includes no more than two look-up tables that contain digitized transformation values for performing matrix multiplications of the linear combinations of the chrominance color space signals. A second combining unit linearly combines the digitized transformation values outputted by the multiplexed multiplication unit and a predetermined binary combination of the luminance color space signal in a first predetermined manner to generate three RGB color combination signals. A third combining unit linearly combines the RGB color combination signals in a second predetermined manner to obtain the RGB color space signals.

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