Proceedings of the 2012 National Conference on Information Technology and Computer Science

A Variable Step Size RPE Algorithm for Echo Cancelation

Authors
Hongxing Yuan, Renxiang Zhu, Shaoqun Wu, Li Guo
Corresponding Author
Hongxing Yuan
Available Online November 2012.
DOI
https://doi.org/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.
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Proceedings
2012 National Conference on Information Technology and Computer Science
Part of series
Advances in Intelligent Systems Research
Publication Date
November 2012
ISBN
978-94-91216-39-8
ISSN
1951-6851
DOI
https://doi.org/10.2991/citcs.2012.231How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

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  - 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  - https://doi.org/10.2991/citcs.2012.231
ID  - Yuan2012/11
ER  -