An Acoustic Echo Canceller Using Subband Adaptive Filters
Blekinge Institute of Technology, Department of Signal Processing1996 (English)Conference paper (Refereed) Published
The use of hands-free communication in cars, computer applications and video-conferencing has created a demand for high-quality acoustic echo cancellation. In these applications have the acoustic channel typically a long impulse response in the order of 100ms. Typical lengths of adaptive FIR-filters can be 500-1500 taps. In order to reduce the complexity and also improve the convergence rate have subband processing schemes been suggested. This paper presents an implementation of a delayless subband adaptive filter. The study shows a possible suppression of about 30 dB and also a more rapid convergence than a fullband LMS-filter.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:bth-10098Local ID: oai:bth.se:forskinfo42607D8A274D1CCFC12568A3002CAA3BOAI: oai:DiVA.org:bth-10098DiVA: diva2:838131
4th UK/Australian Symposium on DSP for Communication Systems