Method and apparatus for remote synchronous switching of video t

Details Method and apparatus for remote synchronous switching of video t Method and apparatus for remote synchronous switching of video t

1992-09-24

1994-08-02

Groody, James J.

Television

Special applications

Observation of or from a specific location

348211, H04N 718

Patent

active

053350146

ABSTRACT:
A method and apparatus for synchronous switching of a plurality of transmitters each including a television camera for generating composite video signals and each incorporating an individually allotted identification code, in which at least one transmission line receives and transmits information to and from the plurality of the transmitters. A receiver incorporates an external synchronizing signal generator and an identification code generator for receiving and displaying the images on the monitor, for synchronizing a plurality of the transmitters and for transmitting identification codes superposed into the composite video signal generated by the transmitter by injecting the external synchronizing pulses and the identification code into the video transmission line. The receiver also comprises a circuit for modifying the external synchronizing pulses to switch the transmission on or off from an individual transmitter on the basis of the transmitted identification code signal and the modified external synchronizing signal.

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patent: 4989085 (1991-01-01), Elberbaum
patent: 4994916 (1991-02-01), Pshtissky

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