Iterative DFT-domain inverse filter determination for adaptive listening room equalization

Conference contribution
(Conference Contribution)


Publication Details

Author(s): Schneider M, Kellermann W
Publisher: Institute of Electrical and Electronics Engineers Inc.
Publication year: 2012
Pages range: 1-4
ISBN: 9783800734511
Language: English


Abstract


Listening room equalization (LRE) is used to remove the unwanted linear distortion of a reproduced acoustic scene by the listening room. This task comprises the identification of the loudspeaker-enclosure-microphone system (LEMS) and the determination of the pre-equalizing filters for the identified LEMS. For the latter subtask, filtered-X adaptive filtering algorithms allow an iterative optimization of the equalizers, whereby approximations do only affect the convergence speed, but not the optimality of the determined equalizer coefficients. Alternative approaches determine the equalizers by directly solving a system of linear equations, where the obtained equalizer coefficients may be suboptimal due to approximations which potentially facilitate an online implementation for MIMO LEMSs. In this paper, we present an alternative algorithm which allows an iterative optimization of the obtained equalizers, without any filtering of the excitation signals for the adaptation algorithm. Similar to the filtered-X generalized frequency-domain adaptive filtering (FxGFDAF), this approach uses a DFT-domain approximation with low computational cost. The evaluation results show an improved convergence behavior compared to the FxGFDAF.


FAU Authors / FAU Editors

Kellermann, Walter Prof. Dr.-Ing.
Professur für Nachrichtentechnik
Schneider, Martin
Lehrstuhl für Multimediakommunikation und Signalverarbeitung


How to cite

APA:
Schneider, M., & Kellermann, W. (2012). Iterative DFT-domain inverse filter determination for adaptive listening room equalization. (pp. 1-4). Aachen, DE: Institute of Electrical and Electronics Engineers Inc..

MLA:
Schneider, Martin, and Walter Kellermann. "Iterative DFT-domain inverse filter determination for adaptive listening room equalization." Proceedings of the International Workshop on Acoustic Signal Enhancement (IWAENC), Aachen Institute of Electrical and Electronics Engineers Inc., 2012. 1-4.

BibTeX: 

Last updated on 2018-17-10 at 09:23