Residual echo reduction based on MMSE estimator in acoustic echo canceller

Residual echo reduction based on MMSE estimator in acoustic echo canceller

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 ba...

ASIC - Based Acoustic Echo - Canceller Board ' for

This paper deals with the design and realization of an echo-canceller board for a VME bus. The work has been carried out by integrating the abilities and the competences of some academic and industriai research groups within the framework of Subproject 3.1 of the ltalian National Research Council «TelecommuniCation Project». The board implements an efficient algorithm for the cancellation of ac...

Acoustic Echo Canceller White Paper

An Echo Canceller Robust to Noise and Residual Echo

When we talk with hands-free in a car or noisy lobby, the performance of the echo canceller degrade because background noise added to echo caused by the distance from mouth to microphone is relatively long. It gives a reason for necessity of noise-robust and high convergence speed adaptive algorithm. And if acoustic echo canceller operated not perfectly, residual signal going through the echo c...

A hybrid acoustic echo canceller and suppressor

Wideband communication is becoming a desired feature in telephone conferencing systems. This paper proposes a computationally efficient echo suppression control algorithm to be used when increasing the bandwidth of an audio conferencing system, e.g. a conference telephone. The method presented in this paper gives a quality improvement, in the form of increased bandwidth, at a negligible extra c...