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System identification for listening-room compensation by means of acoustic echo cancellation and acoustic echo suppression filters

: Xiong, F.F.; Appell, J.-E.; Goetze, S.


IEEE Signal Processing Society:
IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2012. Vol.1 : Kyoto, Japan, 25 - 30 March 2012; Proceedings
New York, NY: IEEE, 2012
ISBN: 978-1-4673-0046-9
ISBN: 978-1-4673-0045-2 (Print)
ISBN: 978-1-4673-0044-5 (Online)
International Conference on Acoustics, Speech and Signal Processing (ICASSP) <37, 2012, Kyoto>
Conference Paper
Fraunhofer IDMT ()

Subsystems for dereverberation and acoustic echo cancellation (AEC) / acoustic echo suppression (AES) are important components in high-quality hands-free telecommunication systems. This contribution describes and analyzes a combined system for dereverberation and AEC/AES. The system identification inherently achieved by the AEC/AES system is used for the design of the room impulse response (RIR) equalization filter, i.e. the listening-room compensation (LRC) system. We use complex RIR smoothing and decoupled filtered-X least-mean-squares (dFxLMS) gradient algorithm for LRC and a combined AEC/AES system for the system identification necessary for the LRC filter design. The performance of the combined system and the mutual influences of LRC and AEC/AES are analyzed.