Echo canceller employing dual-h architecture having improved...

Details Echo canceller employing dual-h architecture having improved... Echo canceller employing dual-h architecture having improved...

H - Electricity

04

B

H04B 3/23 (2006.01) H04M 9/08 (2006.01)

Patent

CA 2580432

An echo canceller comprises means having adaptive tap coefficients that are updated for simulating an echo response, means for detecting a non-linear echo path condition and means for placing the echo canceller in a time varying mode in response to the non-linear echo path condition. A method for processing an echo response comprises simulating the echo response with non-adaptive tap coefficients, simulating the echo response with adaptive tap coefficients, transferring the adaptive tap coefficients to replace the tap coefficients when a predetermined condition occurs, detecting a non-linear echo path condition and entering a time varying mode in response to detecting the non-linear echo path condition.

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