A hybrid acoustic echo canceller and suppressor

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Full text:
Author(s): Fredric Lindström, Christian Schüldt, Ingvar Claesson
Title: A hybrid acoustic echo canceller and suppressor
Journal: Signal Processing
Year: 2007
Volume: 87
Issue: 4
Pagination: 739-749
ISSN: 0165-1684
Publisher: Elsevier
ISI number: 000242727800011
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
Authors e-mail: fli@bth.se, csc@bth.se
Language: English
Abstract: 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.
Subject: Signal Processing\General
Keywords: Acoustic echo cancellation, AEC, Acoustic echo suppression, AES, Wideband, Hybrid
Note: doi:10.1016/j.sigpro.2006.07.006