Video monitoring apparatus with plural inputs

Details Video monitoring apparatus with plural inputs Video monitoring apparatus with plural inputs

1989-01-09

1990-11-13

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358153, 358181, 358183, H04N 718

Patent

active

049705881

ABSTRACT:
Analog-to-digital converters of an image processor dealing with multiple input video signals are each provided with a sync separation circuit for extracting the sync signal from the input video signal and a frequency divider which is reset by the sync signal and adapted to reduce the clock frequency. The frequency dividers have an equal reduction ratio and equal clock, and produce sampling clocks used for the analog-to-digital conversion.

REFERENCES:
patent: 4673974 (1987-06-01), Ito et al.
patent: 4713685 (1987-12-01), Nishimura et al.
patent: 4772945 (1988-09-01), Tagawa et al.
Television Technique, Jan. 1987, pp. 20-24.

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