Cable television system

Details Cable television system Cable television system

H - Electricity

04

N

350/30

H04N 7/16 (2006.01) H04N 7/06 (2006.01) H04N 7/10 (2006.01) H04H 1/00 (2006.01)

Patent

CA 1223335

ABSTRACT OF THE DISCLOSURE A CATV (cable television) signal transmitting system for use with a broadcast satellite system includes a receiving stage for receiving a broadcast satellite station signal consisting of a base-band video signal and a sub-channel digital audio signals PSX (phase shift keying)- modulated on a sub-carrier, a demodulator for deriving the video signal and digital audio signals, a first modulator for modulating one main carrier of a plurality of channels of CATV channels by the video signal, a second modulator for modulating the other main carrier of different channels by the digital audio signals in time-division manner. The mixed output signal from the first and second modulators is transmitted through a CATV transmission line. A CATV signal receiving system is also provided to produce video signals and digital audio signals which are converted into a plurality of channels of analog audio signals.

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