Enhanced partitioned stereo residual echo estimation

被引：2

作者：

Goetze, Stefan ^{[1
]}

Kammeyer, Karl-Dirk ^{[1
]}

Kallinger, Markus ^{[2
]}

Mertins, Alfred ^{[2
]}

机构：

[1] Univ Bremen, Dept Commun Engn, D-28334 Bremen, Germany

[2] Carl von Ossietzky Univ Oldenburg, Signal Proc Grp, D-26111 Oldenburg, Germany

来源：

2006 FORTIETH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS, VOLS 1-5 | 2006年

关键词：

D O I：

10.1109/ACSSC.2006.354971

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

For convenient hands-free telecommunication systems echo cancelers with a low delay are desirable. Since such systems have to cope with long room impulse responses (RIRs) common echo cancelation techniques often suffer from slow convergence or introduce large delays. An algorithm for acoustic echo cancelation (AFC) has to compensate the influence of RIRs of several thousand sampling points. Thus for frequency domain algorithms long DFT-lengths are needed to cover the whole influence of the RIRs. Approaches In the partitioned frequency domain overcome this drawback Our contribution describes a combined echo cancelation system in the partitioned frequency domain containing a conventional stereo AEC enhanced by a post-filter which requires a reliable residual echo estimate. This contribution focuses on minimizing the estimation bias introduced by partitioned residual echo estimation. For this purpose an optimal smoothing factor for the residual echo differential system will be derived.

引用

页码：1326 / +

页数：2

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