Multiplex communications – Wide area network – Packet switching
Patent
1986-01-27
1987-04-21
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
371 43, 370118, H04J 300
Patent
active
046601961
ABSTRACT:
A digital audio satellite transmission system involving analog-to-digital conversion of audio signals, processing of such signals and transmission to and reception from a satellite transponder link. The digitized audio signal is digitally compressed to reduce the data rate. Several such signals are then time division multiplexed together. Differential encoding, bit interleaving and forward error correction coding is utilized to maintain high signal quality, together with binary phase shift key carrier modulation. Matched filter reception of the BPSK signal transmitted over a conventional satellite transponder link is provided together with BPSK demodulation, TDM demultiplexing, differential decoding, bit deinterleaving and threshold or FEC decoding. The compressed digital signal is then expanded and converted to an analog audio signal.
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A. L. McBride, "Scientific-Atlanta's 3-Meter Digital Audio Terminal", Oct. 1980 (7 pages).
Satellite Communication Division, Scientific-Atlanta, Inc., "Proposal for Digital Audio Satellite Distribution for Network Radio 55TP022A, Nov. 1981.
Scientific-Atlanta, Inc., "Satellite Distributed Digital Audio for Network Radio", Apr. 1982.
Brochure-"Digital Audio 3-Meter Earth Station", Jun. 1982, (2 pages).
Scientific-Atlanta, Inc., "A Design Plan for: Digital Audio System", Feb. 1982.
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Materials prepared in conjunction with Scientific-Atlanta's Demonstration of a Predecessor Digital Audio Satellite System at the National Association of Broadcasters' Dallas Convention in Apr. 1982.
"CBS Radio Networks and Satellite Distribution in the 80's".
Chamberlin James W.
Gray James S.
McBride Alan L.
Schreiner, III Peter G.
Olms Douglas W.
Scientific - Atlanta, Inc.
Scutch III Frank M.
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