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A multirate acoustic echo canceler structure

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4 Author(s)
F. Amano ; Radio & Satellite Commun. Syst. Lab., Fujitsu Labs. Ltd., Kawasaki, Japan ; H. P. Meana ; A. de Luca ; G. Duchen

A new subband echo canceler (SBEC) structure is proposed to reduce the transmission delay introduced by conventional SBEC structures, without distorting the near-end signal. The proposed structure is based on computing two output errors, one for using during single-talk and the other one for using during double-talk periods. With the SBEC structure we propose a double-talk detector with a subband configuration which allows a fast and accurate detection of double-talk periods, enabling the SBEC algorithm to track changes in the echo path impulse response when the near-end signal is absent. Computer simulations using actual speech signals, and subjective evaluation tests are given to show the convergence performance, tracking and double-talk detection ability, of the proposed scheme

Published in:

IEEE Transactions on Communications  (Volume:43 ,  Issue: 7 )