Video signal mixing unit for simultaneously displaying video sig

Details Video signal mixing unit for simultaneously displaying video sig Video signal mixing unit for simultaneously displaying video sig

1988-02-12

1989-10-31

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 5275

Patent

active

048781177

ABSTRACT:
A display control unit for combining first video signal transmitted from a first video information source which is controlled by a first pixel clock and a first synchronizing signal with second video signal transmitted from a second video information source which is controlled by a second pixel clock and a second synchronizing signal so that the first and the second video signals can be displayed on a CRT display device which is controlled by the first pixel clock and the first synchronizing signal.

REFERENCES:
patent: 4266242 (1981-05-01), McCoy
patent: 4599611 (1986-07-01), Bowker
patent: 4622545 (1986-11-01), Atkinson

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