Video noise jammer

Details Video noise jammer Video noise jammer

H - Electricity

04

L

350/29

H04L 9/00 (2006.01) H04K 1/02 (2006.01) H04N 7/16 (2006.01)

Patent

CA 1270941

A B S T R A C T A multichannel signal distribution control system, such as a CATV system, providing a plurality of video signal channels wherein selected channels are obscured by random noise jammer signals. The signal distribution system includes multiple output ports, each port connected to a respective user or subscriber. The random noise jammer signal is provided by a band-limited noise source and a signal translator which provides a noise signal band corresponding to the frequency of the channel to be selectively disabled. The resulting noise signal is added to the signals for specific individual subscriber output ports to obscure the signal on the selected channel of that individual subscriber. The multichannel signal distribution control system is controlled by signals provided remotely from a home office to each local jamming device by control signals superimposed on the multiple channel signal feed line.

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