Stereo signal communication system and method

Details Stereo signal communication system and method Stereo signal communication system and method

1990-03-05

1991-10-01

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

381 14, 381 4, H04H 500

Patent

active

050540700

ABSTRACT:
A system which enables transmission of a standard composite stereo sound signal, made up of baseband, subcarrier band and pilot signals, from a first location to a second location while requiring only a relatively low bit rate for the transmission link. The standard composite stereo signal is synchronously sampled at a first location at rate F.sub.s twice the subcarrier frequency F.sub.c (four times the pilot frequency F.sub.p), and the sampled signal transmitted over the link along with appropriate synchronizing signals. At the second location, a signal processor separates the received signal into a first signal related to one stereo channel signal (e.g. R) and a second signal representative of the other stereo channel (e.g. L), determines the proper scale for the pilot signal, and regenerates the original standard composite stereo sound signal by combining the L-related and R-related signals with the pilot scale signals in appropriate proportions and with appropriate filtering. Bit interpolation techniques are preferably employed at the second station to facilitate the necessary filtering.

REFERENCES:
patent: 3040132 (1962-06-01), Wilhelm
patent: 3789323 (1974-01-01), Andersen et al.
patent: 3902019 (1975-08-01), Bruene
patent: 4194161 (1980-03-01), Hershberger
patent: 4688253 (1987-08-01), Gumm
patent: 4723288 (1988-02-01), Borth et al.
patent: 4757538 (1988-07-01), Zink

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