Apparatus for frame-to-frame comb filtering composite TV signal

Details Apparatus for frame-to-frame comb filtering composite TV signal Apparatus for frame-to-frame comb filtering composite TV signal

1984-02-06

1985-10-29

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, H04N 9535, H04N 521

Patent

active

045503400

ABSTRACT:
Motion induced image distortion resulting from processing video signals in a frame-to-frame comb filter is substantially reduced by extracting motion induced luminance cross components in frame combed chrominance signal and reinserting them in the frame combed luminance signal. The chrominance signal is applied to a low pass filter to extract luminance components for reinsertion in the combed luminance signal. Higher frequency luminance cross components required to completely compensate the combed luninance signal are rejected by the low pass filter, however, to account for the missing high frequency luminance cross components, the combed luminance signal is selectively low pass filtered during interframe motion intervals before reinsertion of the cross components.

REFERENCES:
patent: 4232330 (1980-11-01), Heitmann
patent: 4296436 (1981-10-01), Achiha
patent: 4343019 (1982-08-01), Lagoni
patent: 4498099 (1985-02-01), Pritchard
patent: 4498100 (1985-02-01), Bunting et al.
Pritchard, "ACCD Comb Filter for Color TV Receiver Picture Enhancement", RCA Review, vol. 41, Mar. 1980, pp. 3-28.
"A Motion-Adaptive System for Converting Color TV Signals into High Definition Signals", ITEJ, 7-2-80.

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