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Residual echo signal in critically sampled subband acoustic echo cancellers based on IIR and FIR filter banks

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posted on 19.01.2010 by Oguz Tanrıkulu, Buyurman Baykal, A.G. Constantinides, Jonathon Chambers
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

History

School

  • Mechanical, Electrical and Manufacturing Engineering

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

Publisher

© IEEE

Version

VoR (Version of Record)

Publication date

1997

Notes

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.

ISSN

1053-587X

Language

en

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