Wired television broadcasting systems

Details Wired television broadcasting systems Wired television broadcasting systems

H - Electricity

04

N

350/20

H04N 7/16 (2006.01) H04N 7/167 (2006.01)

Patent

CA 1169543

ABSTRACT There is disclosed a wired television system comprising a source of television signal supplying signals to a transmission network, subscriber stations connected to the network, means for preventing reception of transmitted signals by at least one subscriber station, and means for overriding the preventing means to enable that subscriber to receive the transmitted signals. The television signals are heterodyned with a scrambling signal to provide the transmitted signals, and the scrambling station, the transmitted signals and the scrambling signal are heterodyned to recover the television signal.

381104

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