Volume control for CATV and method therefor

Details Volume control for CATV and method therefor Volume control for CATV and method therefor

1983-06-20

1985-08-20

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 86, 3581941, H04N 562, H04N 716

Patent

active

045367981

ABSTRACT:
A volume control circuit useful for remotely controlling volume through a CATV remote control unit uses a sound carrier demodulator to obtain an intercarrier sound signal. The intercarrier sound signal is further demodulated to obtain a detected audio signal whose amplitude can then be easily controlled by an amplifier. The gain of the amplifier can then be controlled from the remote unit. The detected audio is then remodulated with the RF video carrier. The remodulated audio is then summed with the video signal to provide an RF output signal having amplitude controlled audio.

REFERENCES:
patent: 4237485 (1980-12-01), Saito
patent: 4258391 (1981-03-01), Papay
patent: 4395734 (1983-07-01), Rypkema

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