Signal transmission system for a CATV system

Details Signal transmission system for a CATV system Signal transmission system for a CATV system

1987-09-14

1989-02-14

George, Keith E.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 710

Patent

active

048050148

ABSTRACT:
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 base-band video signals and a sub-channel digital audio signals PSK (phase shift keying)-modulated on sub-carriers, demodulators for deriving the video signals and digital audio signals, first modulators for modulating the main carriers of a plurality of CATV channels by the video signals, a second modulator for modulating the main carrier of a different channel 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.

REFERENCES:
patent: 3757225 (1973-09-01), Ulicki
patent: 3988528 (1976-10-01), Yanagimachi et al.
patent: 4215370 (1980-07-01), Kirk, Jr.
patent: 4513315 (1985-04-01), Dekker et al.
patent: 4656629 (1987-04-01), Kondoh et al.
Nachrichtentechnische Zeitschriftntz, Jun. 1983, pp. 364-370.
Funkschau, Sep. 1974, pp. 689-692.

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