Adaptive error concealment

Details Adaptive error concealment Adaptive error concealment

1981-04-30

1983-03-22

Konick, Bernard

Facsimile and static presentation processing

Static presentation processing

Attribute control

358163, 358314, 371 65, H04N 9535, H04N 576

Patent

active

043778208

ABSTRACT:
Method and apparatus for replacing defective video information in a video signal line comprises sampling the video signal. Video information from the preceding in-phase pixel and the subsequent in-phase pixel are averaged to form a replacement pixel. Weighting coefficients are generated based upon the amplitude difference between the next adjacent and semi-adjacent pixels having the same subcarrier phase. These weighting coefficients are used to determine the amount of information contribution of the previous and subsequent pixels to arrive at the closest video approximation of the defective pixel. Three times color subcarrier frequency sampling is preferred.

REFERENCES:
patent: 4122489 (1978-10-01), Bolger et al.
patent: 4163249 (1979-07-01), Michael et al.
patent: 4315278 (1982-02-01), Pasdera

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