Gated video mixer

Details Gated video mixer Gated video mixer

1988-03-31

1989-08-08

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 5265

Patent

active

048558320

ABSTRACT:
A video mixer circuit is used to combine two video signals, one of higher image quality than the other. The poorer of the two video signals is gated to clamp off its poorer signal during selected intervals of the video signal. The intervals of clamping off are determined by a discriminator sensitive to the voltage level of one of the video signals.

REFERENCES:
patent: 4070695 (1978-01-01), Scholz
patent: 4507683 (1985-03-01), Griesshaber
patent: 4647974 (1987-03-01), Butler
patent: 4729029 (1988-03-01), Henri

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