System and method for compensating against false color from comp

Details System and method for compensating against false color from comp System and method for compensating against false color from comp

1998-06-02

2000-08-22

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348631, 348624, 348666, H04N 978

Patent

active

061080489

ABSTRACT:
A system and method for compensating against false color from composite video source information detects when there is a diagonal luminance transition (or a cross pattern) and attenuates combed chrominance information to facilitate a reduction in a false coloring effect. A programmable threshold diagonal transition detector generates a multi-level compensation control signal, such as the amount of chrominance reduction or attenuation (in dB) to effectively notch combed chrominance data, based on a detection of a diagonal transition of luminance data among lines of video data. The multi-level compensation control signal is used by a multi-level compensator to attenuate the combed chrominance information from the 2-D adaptive comb filter.

REFERENCES:
patent: 5361103 (1994-11-01), Naka et al.
patent: 5594508 (1997-01-01), Penney
Video Demystified, by Keith Jack (1997), Chapter 6, pp. 282-296.

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