FM television telephone system

Details FM television telephone system FM television telephone system

1974-05-23

1976-08-10

Stellar, George G.

Telegraphy

Systems

Printing

178 68, 178DIG7, H04M 1100, H04N 710

Patent

active

039743373

ABSTRACT:
A television telephone system, wherein frequency-modulation with a low modulation index is effected by using a carrier wave of a slightly higher frequency than the maximum frequency of a video signal, and the video signal thus modulated is transmitted through a transmission line. With such system, a wide band video signal and audio signal can be transmitted without cross talk and distortion by using an ordinary telephone cable which is intended to be used only for the transmission of voice frequency signals, and communication can be achieved, with the image of the opposite party or drawing, document or the like being viewed.

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patent: 3524023 (1970-08-01), Whang
patent: 3530251 (1970-09-01), Miyawaki

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