Cross color suppression for quadrature modulated color televisio

Details Cross color suppression for quadrature modulated color televisio Cross color suppression for quadrature modulated color televisio

1986-01-31

1987-11-10

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

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358 36, H04N 978

Patent

active

047061120

ABSTRACT:
A method is disclosed for reducing cross-color artifacts occuring at a diagonal luminance transition in a quadrature modulated color television signal in which a chrominance component carried on a color subcarrier has been separated from the signal by comb filter processing. The steps of the method are detecting the occurrence of a diagonal luminance transition in the signal; developing a control signal from the detected luminance transition; and, processing the chrominance component under the control of the control signal to reduce the cross-color artifact in the chrominance at the instance of the detected luminance transition.

REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4167020 (1979-09-01), Holmes
patent: 4179705 (1979-12-01), Faroudja
patent: 4240105 (1980-12-01), Faroudja
patent: 4389665 (1983-06-01), Nagao et al.
patent: 4464686 (1984-08-01), Reitmeier
Sasaki et al., "A Simplified Cross-Color Suppression Circuit for Color Television Receivers, IEEE Trans. on Broadcasting and TV Receivers, Aug. 1978, pp. 178-183.

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