Multiplex transmission method and apparatus

Details Multiplex transmission method and apparatus Multiplex transmission method and apparatus

1988-01-29

1989-11-21

Orsino, Joseph A.

Multiplex communications

Wide area network

Packet switching

370 20, 358143, 358343, H04J 900

Patent

active

048827258

ABSTRACT:
A multiplex transmission method using especially a vestigial-sideband amplitude-modulated carrier modulated by a video signal. The method includes modulating a carrier having a quadrature phase with respect to an amplitude-modulated carrier by a multiplex-transmitted signal such as a digital-coded signal with a lower level as compared with the amplitude-modulated carrier, suppressing signal components of a signal obtained by modulating the carrier by a multiplex-transmitted signal, which is located near the carrier frequency, combining the result with the amplitude-modulated carrier, and thereafter transmitting the combined signal.

REFERENCES:
patent: 4404532 (1983-09-01), Welti
patent: 4410911 (1983-10-01), Field et al.
"Receiver for DBS with Digital Audio Signals", IEEE Trans CE-30, No. 3 (Aug. 1984); T. Arai; pp. 266-270.
"Broadcasting System"; Broadcasting Technical Library 2; Japan Broadcasting Publication Co.; Jan. 1983, pp. 205-208.

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