Acoustic Echo Cancellation Employing Delayless Subband Adaptive Filters
| Document type: | Conference Papers |
|---|---|
| Peer reviewed: | Yes |
| Full text: | |
| Author(s): | Jörgen Nordberg, Mattias Dahl, Ingvar Claesson, Sven Nordholm, Sven Nordebo |
| Title: | Acoustic Echo Cancellation Employing Delayless Subband Adaptive Filters |
| Conference name: | Proceedings of the 1996 SNRV and NUTEK Conference on Radio Sciences and Telecommunications in Luleå and Kiruna June 3-6, 1996 / RVK 96 |
| Year: | 1996 |
| ISBN: | 91-630-4455-2 |
| Publisher: | Luleå Univ. of Technology (Tekniska högsk.) |
| City: | Luleå |
| Organization: | Blekinge Institute of Technology |
| Department: | Dept. of Signal Processing (Institutionen för signalbehandling) Dept. of Signal Processing S-372 25 Ronneby +46 455 780 00 http://www.hk-r.se/isb/isb_en.html |
| Authors e-mail: | Mattias.Dahl@isb.hk-r.se |
| Language: | English |
| Abstract: | 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. |
| Subject: | Signal Processing\Speech Enhancement |
