04649505 is referenced by 174 patents and cites 10 patents.

A two-input crosstalk-resistant adaptive noise canceller receives a primary input signal including a desired speech signal portion and an undesired noise signal portion and also receives a reference input signal having a reference noise input portion and a crosstalk speech portion. The canceller has first and second summer means and first and second adaptive filter means. The first summer means provides a canceller output signal which is the difference between the primary input signal and the first adaptive filter output signal. The canceller output signal is applied to the reference input of the second adaptive filter and to one of a pair of error-control inputs of the first adaptive filter. The second error-control input of the first adaptive filter is provided by the signal at the output of the second adaptive filter, which receives a single error-control input signal from the output of the second summer means. The second summer provides an output signal which is the difference between the reference input signal and the second adapter filter output signal. With the correlation bias between the desired primary input (speech) signal and the crosstalk (speech) signal in the reference input substantially reduced, the canceller output signal is then related substantially only to the primary input desired signal.

Title
Two-input crosstalk-resistant adaptive noise canceller
Application Number
6/627251
Publication Number
4649505
Application Date
July 2, 1984
Publication Date
March 10, 1987
Inventor
Steven R Koch
Schenectady
NY, US
Seth D Silverstein
Schenectady
NY, US
Richard L Zinser Jr
Schenectady
NY, US
Agent
Marvin Snyder
James C Davis Jr
Geoffrey H Krauss
Assignee
General Electric Company
NY, US
IPC
H04B 3/20
G06F 7/38
H03K 5/159
H03F 1/266
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