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A Method for Reduced Finite Precision Effects in Parallel Filtering Echo Cancellation
Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
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2007 (English)In: IEEE transactions on circuits and systems I-Regular Papers, ISSN 1057-7122, Vol. 54, no 9, 2011-2018 p.Article in journal (Refereed) Published
Abstract [en]

The two-path algorithm is an adaptive filter algorithm based on a parallel filter structure, which has been found to be useful for line echo cancellation as well as for acoustic echo cancellation. It is well known that in finite precision arithmetic, the adaptation process of adaptive algorithms can be reduced or even halted due to finite precision effects. This paper proposes a variant of the two-path scheme where the effects of quantization are reduced, without any significant increase in complexity. The improvement is shown by simulations using bandlimited flat spectrum noise as well as real speech signals.

Place, publisher, year, edition, pages
IEEE , 2007. Vol. 54, no 9, 2011-2018 p.
Keyword [en]
adaptive filtering, LMS, NLMS, two-path, parallell filters, shadow filter, fixed point, precision, stalling
National Category
Signal Processing
URN: urn:nbn:se:bth-8460DOI: 10.1109/TCSI.2007.904664ISI: 000249730800014Local ID: diva2:836184
Available from: 2012-09-18 Created: 2008-08-15 Last updated: 2016-09-06Bibliographically approved

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Claesson, Ingvar
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