US PATENT SUBCLASS 381 / 94.7
.~ Using signal channel and noise channel

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

94.1  DF  NOISE OR DISTORTION SUPPRESSION {7}
94.7.~ Using signal channel and noise channel

DEFINITION

Classification: 381/94.7

Using signal channel and noise channel:

(under subclass 94.1) Subject matter having separate inputs, each respectively containing primarily the desired and undesired signals, and which derives at least one "clean" output having the desired signal by utilizing both inputs, such as by subtracting one input from the other.

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94.2, for noise suppression using spectral adjustment.