Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-02-19
1989-08-01
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358183, 358 22, H04N 5268, H04N 5272, H04N 974
Patent
active
048537845
ABSTRACT:
A video switcher comprises a source selector having a plurality of input terminals for connection to a plurality of video sources respectively, and at least two output terminals. At least two processing channels each have an input terminal connected to an output terminal of the source selector and also have an output terminal. A video combiner has video input terminals connected to the output terminals of the processing channels and is operative to combine the output signals provided by the processing channels in dependence upon priority signals.
REFERENCES:
patent: 4222076 (1980-09-01), Knowlton
patent: 4360831 (1982-11-01), Kellar
patent: 4447886 (1984-05-01), Meeker
patent: 4758892 (1988-07-01), Bloomfield
Abt John
Bannister Richard S.
Barnett Ronnie D.
Blecksmith James E.
Frasier Richard A.
Gray Francis I.
Groody James J.
Peng John K.
Smith-Hill John
The Grass Valley Group Inc.
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