Graduate School and Research Center in Digital Sciences

Non-linear acoustic echo cancellation using online loudspeaker linearization

Mossi, Moctar; Yemdji, Christelle; Evans, Nicholas; Beaugeant, Christophe

WASPAA 2011, IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, October 16-19, 2011, New York, USA

    This paper presents an approach to non-linear acoustic echo cancellation (AEC).We first present the model of a loudspeaker enclosure microphone system which is divided into two blocks: a non-linear, power filter model for the down-link path (loudspeaker and amplifiers) and a linear model for the acoustic channel and up-link path. Using this model we propose an approach that uses loudspeaker linearization and linear AEC to improve performance of an otherwise classical approach to linear AEC. The novel contribution in this paper relates to a new on-line linearization pre-processing algorithm that adapts to long-term variations in the loudspeaker characteristics. This feature contrasts with fixed pre-processor aglorithms which have been reported previously.

Document Doi Bibtex

Title:Non-linear acoustic echo cancellation using online loudspeaker linearization
Keywords:Adaptive filtering, AEC, loudspeaker linearization, non-linearity, power filter, Volterra
Type:Conference
Language:English
City:New York
Country:UNITED STATES
Date:
Department:Digital Security
Eurecom ref:3457
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Bibtex: @inproceedings{EURECOM+3457, doi = {http://dx.doi.org/10.1109/ASPAA.2011.6082311 }, year = {2011}, title = {{N}on-linear acoustic echo cancellation using online loudspeaker linearization}, author = {{M}ossi, {M}octar and {Y}emdji, {C}hristelle and {E}vans, {N}icholas and {B}eaugeant, {C}hristophe }, booktitle = {{WASPAA} 2011, {IEEE} {W}orkshop on {A}pplications of {S}ignal {P}rocessing to {A}udio and {A}coustics, {O}ctober 16-19, 2011, {N}ew {Y}ork, {USA}}, address = {{N}ew {Y}ork, {UNITED} {STATES}}, month = {10}, url = {http://www.eurecom.fr/publication/3457} }
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