A subspace-based adaptive approach for multichannel equalization of room acoustics

Di Liu, Rajan S. Rashobh, W. H. Khong, Masahiro Yukawa

Research output: Contribution to conferencePaper

Abstract

Multichannel equalization (MCEQ) techniques have been proposed for the inversion of acoustic impulse responses (AIRs) with a wide range of applications such as speech dereverberation. Adaptive MCEQ techniques can address the problem of high computational complexity required for the inversion of high order AIRs using non-adaptive algorithms based on the multiple-input/output inverse theorem (MINT). In this paper, we propose a subspace-based adaptive algorithm for MCEQ in the time domain. Unlike conventional techniques, instead of using a single set of inverse filters, multiple sets of inverse filters, each designated for each subspace, are adaptively estimated in our algorithm and equalization is achieved using these filters. Simulation and experimental results show that the proposed adaptive algorithm not only achieves a high convergence rate but also yields better equalization in terms of quality. In addition, the proposed algorithm achieves higher robustness to AIR estimation errors.

Original languageEnglish
Pages319-325
Number of pages7
Publication statusPublished - 2011 Dec 1
EventAsia-Pacific Signal and Information Processing Association Annual Summit and Conference 2011, APSIPA ASC 2011 - Xi'an, China
Duration: 2011 Oct 182011 Oct 21

Other

OtherAsia-Pacific Signal and Information Processing Association Annual Summit and Conference 2011, APSIPA ASC 2011
CountryChina
CityXi'an
Period11/10/1811/10/21

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ASJC Scopus subject areas

  • Information Systems
  • Signal Processing

Cite this

Liu, D., Rashobh, R. S., Khong, W. H., & Yukawa, M. (2011). A subspace-based adaptive approach for multichannel equalization of room acoustics. 319-325. Paper presented at Asia-Pacific Signal and Information Processing Association Annual Summit and Conference 2011, APSIPA ASC 2011, Xi'an, China.