A Variable Step Size RPE Algorithm for Echo Cancelation

DOI

10.2991/citcs.2012.231How to use a DOI?

Keywords

acoustic echo, AR model, recursive prediction error, double-talk, step size, misalignment

Abstract

Acoustic echo cancellation (AEC) algorithms are widely used in communication devices. One of the main design problems is double-talk issue. The recursive prediction error (RPE) algorithm based on autoregressive (AR) model has been proven to be more attractive to traditional approaches. However, it adapts too fast in double-talk which may cause the algorithm to diverge. A variable step size (VSS) approach is developed to tackle the problem. On the assumption that prediction error is more than 10 times smaller than microphone signal when the adaptive filter has converged, the step size is adjusted adaptively according to the energies of near-end, far-end and prediction error signals. The experimental results show that our algorithm, compared with original RPE algorithm, the performance in double-talk is improved more than 8 dB while no any performance losses in single-talk and echo path change cases.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hongxing Yuan
AU  - Renxiang Zhu
AU  - Shaoqun Wu
AU  - Li Guo
PY  - 2012/11
DA  - 2012/11
TI  - A Variable Step Size RPE Algorithm for Echo Cancelation
BT  - Proceedings of the 2012 National Conference on Information Technology and Computer Science
PB  - Atlantis Press
SP  - 909
EP  - 912
SN  - 1951-6851
UR  - https://doi.org/10.2991/citcs.2012.231
DO  - 10.2991/citcs.2012.231
ID  - Yuan2012/11
ER  -