Stereo radio frequency modulating system

Details Stereo radio frequency modulating system Stereo radio frequency modulating system

1991-04-26

1993-02-16

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358143, H04N 704

Patent

active

051875764

ABSTRACT:
Disclosed is a stereo RF modulating system which converts stereo information along with image information to RF signals in an image recording/reproducing system. Conventional RF modulators can output mono audio information only and thus cannot provide viewers with high fidelity sound. Accordingly, the stereo RF modulating system comprising an audio matrix means, a pilot signal source, a first mixer, a RF carrier oscillator, a first and second local oscillators, a video modulator, first and second modulators, a second mixer, a first switching device, and a second switching device, converts stereo information along with image information to RF signals, and thus provides high fidelity sound.

REFERENCES:
patent: 3099707 (1963-07-01), Dome
patent: 4405944 (1983-09-01), Eilers et al.
patent: 4646150 (1987-02-01), Robbins et al.
patent: 4761814 (1988-08-01), Sugai et al.
Numaguchi, Yasutaka et al., "Multichannel Sound System For Television Broadcasting", IEEE Transactions on Consumer Electronics, vol. CE-27, No. 3, Aug. 1981, pp. 366-371.

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