CHARLES HENRY HAUBRICH
Pilots at Main St, Williamstown, NJ

5054070, Oct 1, 1991

Mar 5, 1990

7/488904

Eric A. Eckstein - Narberth PA
Charles H. Haubrich - Williamstown NJ

QEI Corporation - Williamstown NJ

H04H 500

381 7

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.