Nonlinear acoustic echo cancellation with 2nd order adaptive Volterra filters

Conference contribution
(Original article)


Publication Details

Author(s): Stenger A, Trautmann L, Rabenstein R
Publisher: IEEE
Publishing place: Piscataway, NJ, United States
Publication year: 1999
Volume: 2
Pages range: 877-880


Abstract


Acoustic echo cancellers in today's speakerphones or video conferencing systems rely on the assumption of a linear echo path. Low-cost audio equipment or constraints of portable communication systems cause nonlinear distortions, which limit the echo return loss enhancement achievable by linear adaptation schemes. These distortions are a super-position of different effects, which can be modelled either as memoryless nonlinearities or as nonlinear systems with memory. Proper adaptation schemes for both cases of nonlinearities are discussed. An echo canceller for nonlinear systems with memory based on an adaptive second order Volterra filter is presented. Its performance is demonstrated by measurements with small loudspeakers. The results show an improvement in the echo return loss enhancement of 7 dB over a conventional linear adaptive filter. The additional computational requirement for the presented Volterra filter is comparable to that of existing acoustic echo cancellers.



FAU Authors / FAU Editors

Rabenstein, Rudolf Prof. Dr.
Lehrstuhl für Multimediakommunikation und Signalverarbeitung


How to cite

APA:
Stenger, A., Trautmann, L., & Rabenstein, R. (1999). Nonlinear acoustic echo cancellation with 2nd order adaptive Volterra filters. (pp. 877-880). Phoenix, AZ, US: Piscataway, NJ, United States: IEEE.

MLA:
Stenger, Alexander, Lutz Trautmann, and Rudolf Rabenstein. "Nonlinear acoustic echo cancellation with 2nd order adaptive Volterra filters." Proceedings of the Proceedings of the 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP-99), Phoenix, AZ Piscataway, NJ, United States: IEEE, 1999. 877-880.

BibTeX: 

Last updated on 2018-06-08 at 12:23