Synchronous quantized subcarrier multiplexer for digital transpo

Details Synchronous quantized subcarrier multiplexer for digital transpo Synchronous quantized subcarrier multiplexer for digital transpo

1989-10-19

1991-03-12

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 691, 370 70, 370 76, 370118, 375 43, 358 15, 358143, 358343, H04J 400, H04J 108

Patent

active

049998315

ABSTRACT:
This invention addresses the digital transmission of wideband video, narrowband audio, and digital information over information networks. More specifically, the invention involves synchronous quantized subcarrier multiplexing (quantized-SCM) which results in purely electronic multiplexing of voice, data and multiple channel full bandwidth NTSC video for digital transmission over a communcation line and recovery of same signals at a receiving station.

REFERENCES:
patent: 4385381 (1983-05-01), Alexis
patent: 4388638 (1983-06-01), Dischert et al.
patent: 4556973 (1985-12-01), Uemura
patent: 4704715 (1987-11-01), Shibagaki et al.
patent: 4849811 (1989-07-01), Kleinerman
Donald K. Weaver, Jr., "A Third Method of Generation and Detection of Single-Sideband Signals", Proceeding of the IRE, Dec. 1956, pp. 1703-1705.
Mischa Schwartz, "Information Transmission, Modulation, and Noise", 1970, pp. 117-122.

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