Video signal dropout compensator

Details Video signal dropout compensator Video signal dropout compensator

1979-07-19

1981-02-10

Konick, Bernard

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, 360 38, H04N 576, H04N 578, H04N 593

Patent

active

042505216

ABSTRACT:
A video signal dropout compensator stores information from at least one incoming television line which is represented by a plurality of samples of combined liminance and chrominance signal components. The samples occur at a rate equal to four times the chrominance subcarrier frequency. When a signal dropout is detected in one or more of the samples, a replacement sample is generated using samples from at least one adjacent television line. The value of the sample on the adjacent line at the horizontal location, corresponding to the dropout sample, is subtracted from the sum of the samples before and after this corresponding location sample. The resultant value gives a dropout replacement sample with proper chrominance phase having a close approximation of the correct luminance value.

REFERENCES:
patent: 3463874 (1969-08-01), Hodge et al.
patent: 3586762 (1971-06-01), Hodge et al.
patent: 3679814 (1972-07-01), Barslay
patent: 3949416 (1976-04-01), Stalley et al.
patent: 4021852 (1977-05-01), Hurst et al.
patent: 4032966 (1977-06-01), Kenney et al.
patent: 4122489 (1978-10-01), Bolger et al.

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