An Acoustic Echo Canceller Using Subband Adaptive Filters
| Document type: | Conference Papers |
|---|---|
| Peer reviewed: | Yes |
| Full text: | |
| Author(s): | Sven Nordholm, Jörgen Nordberg, Joakim Skoog |
| Title: | An Acoustic Echo Canceller Using Subband Adaptive Filters |
| Conference name: | 4th UK/Australian Symposium on DSP for Communication Systems |
| Year: | 1996 |
| City: | Perth |
| 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 |
| 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 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. |
| Subject: | Signal Processing\Filter Design Signal Processing\Detection and Classification |
