Devices, systems and methods for composite signal decoding

Details Devices, systems and methods for composite signal decoding Devices, systems and methods for composite signal decoding

1992-08-31

1995-05-16

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

H04H 500

Patent

active

054168430

ABSTRACT:
A device and method for composite signal decoding is provided in which an analog to digital converter (18) digitizes an incoming composite signal. The digitized signal is transmitted to a least mean squares estimator (24). Least mean squares estimator (24) generates composite estimates which are filtered in filter (26). A phase extractor (28) extracts information on the phase between the sampling frequency and the incoming composite signal. Any phase shift existing between a left channel and right channel of the incoming composite signal are compensated in phase compensator (30). A channel extractor (34) extracts a sum and a difference of the left and right channels based on the phase information generated by phase extractor (28). An interpolator (36) adds and subtracts the information generated by channel extractor (34) to isolate the left and right channel signals.

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Stremler, Ferrel G., Intro. to Communication Systems, Addison-Wesley Pub., 1990, p. 693.
Widrow, et al, "Adaptive Noise Cancelling: Principles and Applications", Proceedings of the IEEE, vol. 63, No. 12, Dec. 1975.
Press, Wm., Numerical Recipes: The Art of Scientific Computing, Cambridge Press, 1986.

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