Closed circuit television apparatus for remotely controlling tel

Details Closed circuit television apparatus for remotely controlling tel Closed circuit television apparatus for remotely controlling tel

1988-11-14

1990-08-14

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358108, H04N 718

Patent

active

049491814

ABSTRACT:
A closed circuit television apparatus for a supervisory system comprises at least one imaging device which includes a remote-controllable television camera for generating video signals, a monitor receiving the video signals and displaying images corresponding to the received video signals, and a controller for generating composite control signals to control the television camera. The composite control signals have a higher frequency than that of the video signals. The imaging device further includes a receiver receiving the composite control signals, extracting the composite control signals by utilizing the difference in frequency between the received composite control signals and the video signals, and operating the television camera based on the extracted composite control signals.

REFERENCES:
patent: 4148069 (1979-04-01), Smiley et al.
patent: 4831438 (1989-05-01), Bellman, Jr. et al.

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