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Delayless Subband Echo Cancellation
Responsible organisation
1997 (English)Conference paper, Published paper (Refereed) Published
Abstract [en]

Echo suppression is a vital part of every communications system. The use of hands-free communication in cars, computer applications and video conferencing have created further demands for high-quality acoustic echo cancellation. In these applications the acoustic channel has, typically, a long impulse response in the order of 100 ms. Typical lengths of adaptive FIR-filters are 500-1500 taps, assuming a 12 kHz sampling frequency. In order to reduce the computational load and also to improve the convergence rate, sub-band processing schemes have been suggested. This paper presents a study of a delayless sub-band adaptive filter. The study shows a possible echo suppression of about 30 dB and also an improved convergence rate when compared to a fullband LMS-filter. The main issues discussed are filter bank design and a simple speech detector that gives a drastic performance improvement.

Place, publisher, year, edition, pages
Adelaide, 1997.
Keyword [en]
Echo cancelation, Multi-rate
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-10009Local ID: oai:bth.se:forskinfo56F442A0C3CF608BC1256C6A004DA123OAI: oai:DiVA.org:bth-10009DiVA: diva2:838016
Conference
Fifth International Congress on Sound and Vibration ICSV'5
Available from: 2012-09-18 Created: 2002-11-07 Last updated: 2015-06-30Bibliographically approved

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Signal Processing

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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