Graduate School and Research Center in Digital Sciences

Efficient low delay filtering for residual echo suppression

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

EUSIPCO 2010, 18th European Signal Processing Conference, August 23-27, 2010, Aalborg, Denmark

In telecommunications terminals speech quality is often degraded by acoustic echo. Various approaches to echo cancellation have been proposed and generally involve two separate stages, namely those of adaptive echo cancellation and, as is the focus here, residual echo suppression. Whilst computationally efficient, residual echo suppression approaches based on gain loss control have poor double talk performance. Sub-band approaches give better performance but generally introduce a significant signal delay. This paper reports new experimental work which assesses the performance of three low delay approaches to suppress residual echo through time domain convolution. Results show that a new approach, based on the inverse discrete Fourier transform, performs as well as the existing approaches for both linear and non-linear echo whilst maintaining computational efficiency and low signal delay.

Document Bibtex

Title:Efficient low delay filtering for residual echo suppression
Keywords:echo cancellation, echo postfiltering, linear echo, non-linear echo, sub-band filtering, FIR filter.
Type:Conference
Language:English
City:Aalborg
Country:DENMARK
Date:
Department:Digital Security
Eurecom ref:3031
Copyright: © EURASIP. Personal use of this material is permitted. The definitive version of this paper was published in EUSIPCO 2010, 18th European Signal Processing Conference, August 23-27, 2010, Aalborg, Denmark and is available at :
Bibtex: @inproceedings{EURECOM+3031, year = {2010}, title = {{E}fficient low delay filtering for residual echo suppression}, author = {{Y}emdji, {C}hristelle and {M}ossi, {M}octar and {E}vans, {N}icholas and {B}eaugeant, {C}hristophe }, booktitle = {{EUSIPCO} 2010, 18th {E}uropean {S}ignal {P}rocessing {C}onference, {A}ugust 23-27, 2010, {A}alborg, {D}enmark}, address = {{A}alborg, {DENMARK}}, month = {08}, url = {http://www.eurecom.fr/publication/3031} }
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