NDLI: Performance improvement of acoustic ECHO cancellers in the presence of external volume change

Content Provider	IEEE Xplore Digital Library
Author	Leblanc, W. Nemer, E.
Copyright Year	2012
Description	Author affiliation: Broadcom Corporation 5300 California Avenue, Irvine CA 92617, USA (Leblanc, W.; Nemer, E.)
Abstract	This paper presents a new method for improving the performance of an acoustic echo canceller operating in a hands-free telephony context, where the terminal connects to an external amplifier whose volume can be changed arbitrarily. This change would normally results in the canceller loosing convergence, and temporarily causes an echo to be heard by the far side. The proposed method provides an effective way to quickly compensate, by continuously tracking key measures across the frequency bands, and adjusting the coefficients as well as the output of the canceller's filter, in order to minimize the level and duration of the residual echo. A subband architecture consisting of two sets of cancellers is considered. Changes in external volume (or tone) are translated into a complex gain (or set of gains) and applied to the output or the coefficients of the foreground canceller filter, according to the optimality criterion of minimizing the mean square error (MSE) at the canceller output. The algorithm uses various metrics to ensure the validity of the computed gains and the overall canceller's stability. Listening tests and perceptual evaluation of speech quality (PESQ) score done in a real-life setting show the method results in a noted improvement of the overall perceptual performance of the canceller.
Starting Page	123
Ending Page	126
File Size	566377
Page Count	4
File Format	PDF
ISBN	9781467308991
e-ISBN	9781467308984
DOI	10.1109/ESPA.2012.6152461
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Context Echo cancellers External Volume Change Filter banks Computer architecture Speech Gain AEC
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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