Adaptive multistandard video comb filter

Details Adaptive multistandard video comb filter Adaptive multistandard video comb filter

1989-11-17

1991-04-02

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 978

Patent

active

050050745

ABSTRACT:
A multimode comb filter for comb filtering, e.g., NTSC and/or PAL video signals includes delay means for concurrently providing video signals representing three adjacent horizontal lines. First and second combining means coupled to the delay means provide alternate 1-H comb filter signals in both the NTSC and PAL modes. Control circuitry coupled to the delay means generates a control signal for adaptively selecting the one of the alternate 1-H comb filtered signals or appropriate proportions of both alternate 1-H comb filtered signals to form an output comb filtered signal.

REFERENCES:
patent: 4727415 (1988-02-01), Nakagawa et al.
patent: 4766484 (1988-08-01), Clayton et al.
patent: 4803547 (1989-02-01), Stratton
patent: 4961108 (1990-10-01), Perlman

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