Change search
ReferencesLink to record
Permanent link

Direct link
Delayless Subband Echo Cancellation
Responsible organisation
1997 (English)Conference 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
URN: urn:nbn:se:bth-10009Local ID: diva2:838016
Fifth International Congress on Sound and Vibration ICSV'5
Available from: 2012-09-18 Created: 2002-11-07 Last updated: 2015-06-30Bibliographically approved

Open Access in DiVA

fulltext(413 kB)11 downloads
File information
File name FULLTEXT01.pdfFile size 413 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 11 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 28 hits
ReferencesLink to record
Permanent link

Direct link