Detection and concealing artifacts in combed video signals

Details Detection and concealing artifacts in combed video signals Detection and concealing artifacts in combed video signals

1987-06-09

1989-03-21

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, H04N 978

Patent

active

048148636

ABSTRACT:
Keying signals indicating locations along the lines of a raster where artifacts resulting from combing a video signal occur is derived by a one line subtractive filter, a clipping circuit and a one line AND device and means are provided for replacing video signals in said location with artifact free signals at the same location in either adjacent line if such are available and providing a signal that can be used to set up notch filter rather than combed operation if the corresponding locations on both adjacent lines also contain artifacts.

REFERENCES:
patent: 4178609 (1979-12-01), Beutel
patent: 4241363 (1980-12-01), Maeyama et al.
patent: 4656501 (1987-04-01), Casey et al.

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