Programmable audio/video signal interface

Details Programmable audio/video signal interface Programmable audio/video signal interface

1989-12-21

1991-05-21

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 5268

Patent

active

050180134

ABSTRACT:
A switching interface couples a plurality of video and audio signals from different sources to a single pair of audio outputs and a video output via a plurality of switches. A three wire serial data bus supplies the interface, which includes a serial to parallel converter, an address decoder, a data decoder and a control decoder for developing and applying appropriate switching control signals. A plurality of programmable gain amplifiers are provided for controlling the gain characteristics of the output video signals.

REFERENCES:
patent: 4581645 (1986-04-01), Beyers, Jr.
patent: 4821101 (1989-04-01), Short
patent: 4907079 (1990-03-01), Turner

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