Abstract
Acoustic echo cancellation (AEC) is a well-studied problem. One of the main assumptions in existing AEC techniques is that the echo path is linear. In today's equipment, this assumption does always hold. The increasing focus on the look and feel of commercial devices and consequently the decreasing size of their loudspeakers are the major contributors to making the echo path nonlinear. This emphasizes the need for a nonlinear echo canceler to maintain the required echo return loss enhancement (ERLE). Many algorithms have been proposed to solve this problem, but they are prohibitive because of their high computational complexity. This paper proposes a hardware modification to significantly reduce the nonlinear echo. Results show that up to 6 dB of improvement in ERLE in a real device are possible. © 2013 IEEE.
Recommended Citation
P. Shah et al., "Nonlinear Acoustic Echo Cancellation using Feedback," ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, pp. 610 - 614, article no. 6637720, Institute of Electrical and Electronics Engineers, Oct 2013.
The definitive version is available at https://doi.org/10.1109/ICASSP.2013.6637720
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
back EMF; current feedback; loudspeaker nonlinearity; Nonlinear echo cancellation; voltage feedback
International Standard Book Number (ISBN)
978-147990356-6
International Standard Serial Number (ISSN)
1520-6149
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
18 Oct 2013
