Video signal mixing system

Details Video signal mixing system Video signal mixing system

1979-11-19

1981-03-03

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358181, H04N 516, H04N 708, H04N 522

Patent

active

042544343

ABSTRACT:
A video signal mixing system in which a blanking portion is formed at a predetermined interval in a first video signal by a blanking signal, and a second video signal is inserted into the formed blanking portion of the first video signal, and in which a pedestal level of the first video signal, is detected and held, and the blanking level of the blanking portion is clamped at the held pedestal level of the first video signal with the application of the blanking signal.

REFERENCES:
patent: 3558815 (1971-01-01), Banks

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