Residual echo reduction based on MMSE estimator in acoustic echo canceller

Abstract

In this paper, a residual echo cancellation method is proposed that uses an estimation of the minimum mean-square error ( MMSE) based on a statistical model of a speech signal and an echo signal. After the suppression of the echo signal based on the adaptive filter, residual echo is further reduced by the proposed MMSE estimator and the results are compared with the conventional Wiener filter based method.