Improved method of operating a full duplex speakerphone echo...

Details Improved method of operating a full duplex speakerphone echo... Improved method of operating a full duplex speakerphone echo...

H - Electricity

04

M

H04M 1/20 (2006.01) H04B 3/21 (2006.01) H04M 1/60 (2006.01) H04M 1/74 (2006.01) H04M 9/08 (2006.01)

Patent

CA 2291428

A method of improving convergence of an echo canceller in a full duplex speakerphone, wherein the echo canceller includes LEC (Line Echo Canceller) and AEC (Acoustic Echo Canceller) portions, comprising the steps of capturing LEC coefficients during operation, storing the coefficients, and utilizing the stored coefficients as default values during start-up of a subsequent call. The method of the present invention reduces the overall convergence time of the echo canceller by alleviating the requirement to wait for a suitable reference signal in order to converge the LEC.

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