H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 9/08 (2006.01) G10K 11/178 (2006.01) H04B 3/23 (2006.01)
Patent
CA 2414636
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 coefficients during operation, storing the coefficients, and utilizing the stored coefficients as default values during start-up of a subsequent call. According to the method of the present invention, the amount of echo cancellation necessary to provoke a save of the coefficients decreases with time when it is not achieved by the system despite the presence of a reference signal (i.e. speakerphone signal).
Beaucoup Franck
Tetelbaum Michael
Mitel Knowledge Corporation
Mitel Networks Corporation
Perry + Currier
LandOfFree
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