04658426 is referenced by 133 patents and cites 8 patents.

An adaptive noise suppressor for providing noise filtered signals. The noise suppression device employs a vector gain .mu. for the weights of the filter wherein the vector .mu. is selected for each frequency bin to be inversely proportional to the power spectrum. A projection operator is utilized to remove the effects of circular convolution to produce a linear convolution result wherein the weights are readjusted in a manner to minimize the difference between the input signal and the filter output signal, thereby minimizing the error signal to produce a noise suppressed signal in the filtered output. A frequency suppression device utilizes the same principles of the vector .mu. and projection operator, but the output is taken from the error output of the filter.

Title
Adaptive noise suppressor
Application Number
6/785999
Publication Number
4658426
Application Date
October 10, 1985
Publication Date
April 14, 1987
Inventor
Gary Kenworthy
Fremont
CA, US
Douglas Lynn
Provo
UT, US
Richard W Christiansen
Highland
UT, US
Douglas M Chabries
Salem
UT, US
Agent
G Donald Weber Jr
David A Blumenthal
Assignee
Mark Antin
NY, US
Harold Antin
NY, US
IPC
H04B 15/00
H04R 27/00
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