NDLI: Design of oversampled DFT modulated filter banks optimized for acoustic echo cancellation

Content Provider	IEEE Xplore Digital Library
Author	Qin Li Wei-Ge Chen Chao He Malvar, H.S.
Copyright Year	2009
Description	Author affiliation: Microsoft Research, One Microsoft Way, Redmond, WA 98052, USA (Qin Li; Wei-Ge Chen; Chao He; Malvar, H.S.)
Abstract	This paper describes a method for designing oversampled DFT filter banks (FB) optimized for subband acoustic echo cancellation (AEC). For this application, the design requirements typically are good echo cancellation quality, low delay, small reconstruction error, and low computation complexity. Our method explicitly includes a model for echo return loss enhancement (ERLE) as part of the optimization criteria. Convergence of the high-dimensional, nonlinear optimization problem is facilitated by decorrelating the prototype filter impulse response via a discreet cosine transform (DCT), discarding many insignificant coefficients and thus reducing the dimensionality of the search. The experimental results demonstrate the effectiveness of our design and the effects on the performance of AEC, with ELRE improvements on the order of 3 dB or better. The method is flexible and could also be extended to other application domains.
Starting Page	197
Ending Page	200
File Size	249211
Page Count	4
File Format	PDF
ISBN	9781424423538
ISSN	15206149
DOI	10.1109/ICASSP.2009.4959554
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-19
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Filter bank Design optimization Echo cancellers Design methodology Delay Optimization methods Convergence Decorrelation Prototypes Discrete cosine transforms adaptive filters oversampled filter banks modulated filter banks acoustic echo cancellation
Content Type	Text
Resource Type	Article

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