Non-linear comb filter for color TV receivers

Details Non-linear comb filter for color TV receivers Non-linear comb filter for color TV receivers

1988-03-28

1989-07-04

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 978

Patent

active

048455474

ABSTRACT:
A comb filter for separating chrominance and luminance signals for each sample of a video signal adaptively selects exactly one line above or one line below for processing with the sample of interest. In the process, luminance and chrominance signals are obtained for both processing modes and coupled to a switch. Selection logic utilizes the chrominance signals established for each mode to sequentially check vertical correlation of the video signal, chrominance variations, and vertical detail to position the switch to choose the proper luminance and chrominance signal pair.

REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4178609 (1979-12-01), Beutel

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