N-channel transmission, compatible with 2-channel transmission a

Details N-channel transmission, compatible with 2-channel transmission a N-channel transmission, compatible with 2-channel transmission a

1997-02-07

1999-03-02

Ghebretinsae, Temesghen

Pulse or digital communications

Bandwidth reduction or expansion

Pulse code modulation

370537, H04B 166

Patent

active

058780807

ABSTRACT:
A 3-channel encoder and corresponding decoder is disclosed for encoding a 3-channel signal into a transmission signal which is backwards compatible, so that prior art one channel decoders are capable of decoding the transmission signal into a mono signal and 2-channel decoders are capable of decoding the transmission signal into a compatible stereo signal. Further, a 3-channel decoder is disclosed for decoding the transmission signal into a 3-channel signal. Also a 4-channel encoder is disclosed for encoding the 4-channel signal into a transmission signal which is backwards compatible, so that prior art one channel decoders are capable of decoding the transmission signal into a mono signal and 2-channel decoders are capable of decoding the transmission signal into a compatible stereo signal.

REFERENCES:
patent: 4455649 (1984-06-01), Esteban et al.
patent: 5274740 (1993-12-01), Davis et al.
patent: 5463424 (1995-10-01), Dressler
"A New Surround-Stereo-Surround Coding Techique", by W.R. Ten Kate, J. Audio Eng. Soc., vol. 40, No. 5, May 1992.
"Matrixing of Bit Rate Reduced Audio Signals", by W.R. Ten Kate, Proc. ICASSP, 1992, Mar. 23-26, San Francisco, vol. 2, pp. II-205-II-208.

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