Filter Bank Design for Delayless Subband Adaptive Filtering Structures with Subband Weight Transformation

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Jan Mark de Haan, Lars-Olof Larson, Ingvar Claesson
Title: Filter Bank Design for Delayless Subband Adaptive Filtering Structures with Subband Weight Transformation
Translated title: Filter Bank Design for Delayless Subband Adaptive Filtering Structures with Subband Weight Transformation
Conference name: DSP2002
Year: 2002
Pagination: 251-6
ISBN: 0-7803-8116-5
Publisher: IEEE
City: Pine Mountain, GA, USA
ISI number: 000185284600050
Organization: Blekinge Institute of Technology
Department: Department of Telecommunications and Signal Processing (Institutionen för telekommunikation och signalbehandling)
Department of Telecommunications and Signal Processing S-372 25 Ronneby
+46 455 38 50 00
Authors e-mail: jmd@bth.se
Language: English
Abstract: Subband adaptive filters have been proposed to avoid the drawbacks of slow convergence and high computational complexity associated with time domain adaptive filters. Subband processing introduces transmission delays and signal degradations due to aliasing effects. In order to overcome the delays, delayless adaptive filtering has been introduced where the adaptive algorithm is working in subbands while the signal filtering is performed in fullband. A design method for filter banks with any oversampling factor is utilized, where the total filter bank group delay may be specified, and where the aliasing and magnitude/phase distortions are minimized. This paper investigates the performance of the filter banks in delayless adaptive filtering applied in an acoustic echo cancellation scenario for telephony conferencing
Subject: Signal Processing\Speech Enhancement
Signal Processing\Filter Design
Keywords: adaptive filters, channel bank filters, computational complexity, delays, echo suppression, teleconferencing
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