Apparatus and method for mixing video signals for simultaneous p

Details Apparatus and method for mixing video signals for simultaneous p Apparatus and method for mixing video signals for simultaneous p

1985-02-11

1987-07-14

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358183, H04N 5272, H04N 5262

Patent

active

046806229

ABSTRACT:
An apparatus and its method having a first input for receiving a video signal, and a second input for receiving a computer generated graphics signal. A proportioning circuit is included which algebraically adds a portion of the signal from one input, and an inversely proportional portion of the signal from the other input. The algebraically added signal portions are provided for video display. The apparatus may include a voltage limiting circuit for limiting the combined voltage of the added signal portions to less than a set level.

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