A hybrid acoustic echo canceller and suppressor

Wideband communication is becoming a desired feature in telephone conferencing systems. This paper proposes a computationally efficient echo suppression control algorithm to be used when increasing the bandwidth of an audio conferencing system, e.g. a conference telephone. The method presented in th...

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Bibliographic Details
Published in:Signal processing 2007-04, Vol.87 (4), p.739-749
Main Authors: Lindstrom, Fredric, Schüldt, Christian, Claesson, Ingvar
Format: Article
Language:English
Subjects:
Acoustic echo cancellation
Acoustic echo cancellation (AEC)
Acoustic echo suppression
Acoustic echo suppression (AES)
AEC
AES
Applied sciences
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Hybrid
Information, signal and communications theory
Miscellaneous
Signal and communications theory
Signal processing
Signal, noise
Telecommunications and information theory
Wideband
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Summary:Wideband communication is becoming a desired feature in telephone conferencing systems. This paper proposes a computationally efficient echo suppression control algorithm to be used when increasing the bandwidth of an audio conferencing system, e.g. a conference telephone. The method presented in this paper gives a quality improvement, in the form of increased bandwidth, at a negligible extra computational cost. The increase in bandwidth is obtained through combining a conventional acoustic echo cancellation unit and an acoustic echo suppression unit, i.e. a hybrid echo canceller and suppressor. The proposed solution was implemented in a real-time system. Frequency analysis combined with subjective tests showed that the proposed method extends the bandwidth, while maintaining high quality.
ISSN:0165-1684
1872-7557
DOI:10.1016/j.sigpro.2006.07.006