Video switching

Details Video switching Video switching

1982-04-02

1984-12-11

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, 358181, 358185, H04N 522

Patent

active

044881800

ABSTRACT:
A video switching method for switching between two video signal sources for display on a monitor is employed by intensity modulating a video signal on a television raster lines and frames. Digital values representing pixel positions on the field when a switch is to occur from one source to another are stored. The representations of the pixels during the generation of the raster are counted and compared with the stored representations to effect switching when a equality between the two representatives occurs.

REFERENCES:
patent: 3941925 (1976-03-01), Busch
patent: 4179704 (1979-12-01), Moore
patent: 4199790 (1980-04-01), Greenfield
patent: 4218711 (1980-08-01), Kashigi
patent: 4266242 (1981-05-01), McCoy
patent: 4356511 (1982-10-01), Tsujimura

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