Acoustic Echo Cancellation Employing Delayless 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 these acoustic channel has 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 to improve the convergence rate, subband processing schemes have 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 compared to a fullband LMS-filter.
Place, publisher, year, edition, pages
Luleå: Luleå Univ. of Technology (Tekniska högsk.) , 1996.
IdentifiersURN: urn:nbn:se:bth-9920Local ID: oai:bth.se:forskinfo6E7327CF927C6BDDC12568A3002CAA41ISBN: 91-630-4455-2 OAI: oai:DiVA.org:bth-9920DiVA: diva2:837906
Proceedings of the 1996 SNRV and NUTEK Conference on Radio Sciences and Telecommunications in Luleå and Kiruna June 3-6, 1996 / RVK 96