Adaptive comb filtering system for processing video signals

Details Adaptive comb filtering system for processing video signals Adaptive comb filtering system for processing video signals

1987-04-10

1989-02-07

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 40, H04N 978

Patent

active

048035475

ABSTRACT:
The adaptive comb filtering system presented herein is used to separate the luminance and chrominance components of a composite video signal. This video signal is comprised of a plurality of successive horizontal scan lines. The video signal is separated into a middle (M) scan line component and vertically adjacent top (T) and bottom (B) scan line components. These video signal components are employed to provide as a chrominance output signal either a combed chroma signal derived from the top, middle and bottom components, or an uncombed chroma signal derived from only one of the components. The selection of the combed chroma signal or the uncombed chroma signal is determined by a transistion detector which compares a vertical transition with a horizontal transistion and selects one of the signals as the chrominance output signal in dependance upon the comparison.

REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4072984 (1978-02-01), Kaiser
patent: 4240105 (1980-12-01), Faroudja
patent: 4684989 (1987-08-01), Roeder
patent: 4694342 (1987-09-01), Klees

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