Patent ID: 6075573
Filing Date: 2000-06-13
Classification: G09G,H04N

Abstract:
A method for converting digitized luminance-chrominance color space signals to digitized RGB color space signals based on a standard set of conversion equations that involve four starting chrominance-in-color terms, comprising the steps of:expanding the starting chrominance-in-color terms into linear combinations of expanded chrominance-in-color terms that involve only predictive and compensative coefficients;providing a predictive code generator for generating predictive transformation codes that correspond to a first one of the chrominance color space signals during a first timing phase and that correspond to a second one of the chrominance color space signals during a second timing phase, and a compensative code generator for generating compensative transformation codes that correspond to the first one of the chrominance color space signals during the first timing phase and that correspond to the second one of the chrominance color space signals during the second timing phase, the predictive and compensative transformation codes being transformation values for the expanded chrominance-in-color terms;linearly combining the predictive and compensative transformation codes from the predictive and compensative code generators to obtain transformation values for the starting chrominance-in-color terms; andcombining the transformation values for the starting chrominance-in-color terms with the luminance color space signal according to the standard set of conversion equations to obtain the RGB color space signals.