Echo canceling method, echo canceller and voice switch

Telephonic communications – Echo cancellation or suppression

Reexamination Certificate

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Details

C379S406060, C379S406080, C379S406090, C379S406050

Reexamination Certificate

active

06868157

ABSTRACT:
A digitized input signal is sampled, to obtain a reference input signal. The reference input signal is spuriously whitened, to obtain a pseudo whitened signal. An echo replica signal is generated on the basis of the pseudo whitened signal and an adaptive filter coefficient. A cancellation error signal is obtained on the basis of an echo signal and the echo replica signal. The adaptive filter coefficient is updated on the basis of the cancellation error signal, the adaptive filter coefficient, and the pseudo whitened signal.

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Notice of Rejection with English translation dated Feb. 3, 2004.

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