Television – Image signal processing circuitry specific to television – Chrominance-luminance signal separation
Patent
1997-08-04
2000-04-18
Peng, John K.
Television
Image signal processing circuitry specific to television
Chrominance-luminance signal separation
348665, 348638, 348659, 348667, 358 11, 358 31, H04N 950
Patent
active
060521570
ABSTRACT:
A method and system for separating chrominance and luminance information from a composite spectral signal is disclosed. The method and system comprises demodulating the composite signal prior to separation of the chrominance or luminance information to provide a first U subcomponent and a first V subcomponent and then processing and filtering the first U subcomponent and the first V subcomponent to provide a second U subcomponent and a second V subcomponent, respectively. The method and system also includes combining the second U subcomponent and the second V subcomponent to provide the remodulated chrominance information. In so doing chrominance information is provided in which artifacts are substantially attenuated. Accordingly, by "bypassing" the encoded space to provide "clean U and V" signals directly from the composite signal, the chrominance information or component has no inherent phase (hue) sensitivity to its simultaneously demodulated U and V subcomponents as it does when utilizing conventional comb filtering techniques. Therefore, artifacts in the subcomponents is attenuated. Hence, the artifacts within the remodulated chrominance and extracted luminance information are also substantially attenuated.
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Innovision Labs
Peng John K.
Sajous Wesner
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