This paper proposes double-talk resistant echo canceller with double filters, one for echo-path estimation and one for echo cancellation. An adaptive step-size algorithm based on the cross-correlation between the echo replica and the near-end speech is used for the echo-path identification. The filter coefficients are copied from the estimation filter to the cancellation filter only when the cross-correlation is small enough. Computer simulation results show that the proposed algorithm reduces the performance degradation caused by the estimation delay, ant that the tracking capability of the proposed algorithm for echo path changes is almost comparable to that of a previously proposed double-filter algorithm with fast transversal filter.
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