NDLI: Applying an auxiliary filter in the adaptive echo canceller for performance improvement of double-talk detection

Content Provider	IEEE Xplore Digital Library
Author	Siho Kim Keunsung Bae
Copyright Year	2002
Description	Author affiliation: Sch. of Electron. & Electr. Eng., Kyungpook Nat. Univ., Daegu, South Korea (Siho Kim; Keunsung Bae)
Abstract	This paper deals with the problem of double-talk (DT) detection in an acoustic echo canceller (AEC). In the DT detection algorithm with correlation coefficient, detection errors occasionally occur because it is hard to set the threshold to distinguish DT from echo path change (EPC). When EPC is erroneously considered as DT at the starting point of EPC, the adaptive filter can fall into the situation that it stops updating its filter coefficients. In addition, in case of echo path changing during the DT period, the end-point detection of DT period fails so that the adaptive filter cannot update its tap coefficients even after the DT period ends. To solve this problem, in this paper, we propose a new DT detection algorithm with an auxiliary filter. We use the idea that the error signal cannot be estimated using a reference signal in case of DT situation but it can be in case of EPC. The computer simulation verifies that the proposed method could solve the problem caused by the DT detection error or echo path change during the DT period.
Sponsorship	IEEE Signal Process. Soc
Starting Page	207
Ending Page	210
File Size	259860
Page Count	4
File Format	PDF
ISBN	0780381165
DOI	10.1109/DSPWS.2002.1231104
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Adaptive filters Echo cancellers Microphones Detection algorithms Acoustic signal detection Computer errors Error correction Computer simulation High performance computing Equations
Content Type	Text
Resource Type	Article

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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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