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Title: Residual echo signal in critically sampled subband acoustic echo cancellers based on IIR and FIR filter banks
Authors: Tanrıkulu, Oguz
Baykal, Buyurman
Constantinides, A.G.
Chambers, Jonathon
Keywords: FIR filters
IIR filters
Acoustic signal processing
Adaptive filters
Adaptive signal processing
Band-pass filters
Computational complexity
Echo suppression
Filtering theory
Least squares approximations
Notch filters
Signal sampling
Spectral analysis
Issue Date: 1997
Publisher: © IEEE
Citation: TANRIKULU, O. ... et al, 1997. Residual echo signal in critically sampled subband acoustic echo cancellers based on IIR and FIR filter banks. IEEE Transactions on Signal Processing, 45 (4), pp. 901 - 912
Abstract: The residual echo signal characteristics of critically sampled subband acoustic echo cancellers are analyzed. For finite impulse response (FIR) filter banks, the residual echo signal usually has a relatively broad spectral nature around the subband edges. The residual echo signal of power symmetric infinite impulse response (PS-IIR) filter banks, on the other hand, has very narrowband spectral components around the subband edges. These components can be efficiently removed with PS-IIR notch filters that integrate neatly into the filter banks without introducing perceptually noticeable degradation to the near-end speech. This solution has very low computational complexity and does not impinge on the system performance. Simulation studies with recordings from the cockpit of a car, based on a fast QR least-squares adaptive algorithm, demonstrate the potential of this approach for a practical AEC system
Description: This article was published in the journal, IEEE Transactions on Signal Processing [© IEEE]. It is also available from: http://ieeexplore.ieee.org/servlet/opac? punumber=78. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Version: Published
DOI: 10.1109/78.564178
URI: https://dspace.lboro.ac.uk/2134/5826
ISSN: 1053-587X
Appears in Collections:Published Articles (Electronic, Electrical and Systems Engineering)

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