Video sync validity detector

Details Video sync validity detector Video sync validity detector

1984-01-23

1985-09-24

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358153, 358139, H04N 544, H04N 508, H04N 702

Patent

active

045436142

ABSTRACT:
A video sync validity detector comprises a peak detector circuit and an average detector circuit both responsive to output signals from a sync separator network. Sync representative signals are provided from the output of the peak detector. The average detector is coupled to the peak detector for inhibiting sync representative outputs therefrom in the presence of sync separator output signals representative of false sync signals of average value.

REFERENCES:
patent: 3632864 (1972-01-01), Evans
patent: 4185299 (1980-01-01), Harford
patent: 4295165 (1981-10-01), Watanabe et al.
patent: 4357632 (1982-11-01), French
patent: 4387401 (1983-06-01), Henderson et al.
patent: 4390902 (1983-06-01), Chin et al.
patent: 4398303 (1983-08-01), Chin et al.

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