Binaural dereverberation based on interaural coherence histograms

Adam Westermann*, Jörg M. Buchholz, Torsten Dau

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)
6 Downloads (Pure)

Abstract

A binaural dereverberation algorithm is presented that utilizes the properties of the interaural coherence (IC) inspired by the concepts introduced in Allen [J. Acoust. Soc. Am. 62, 912-915 (1977)]. The algorithm introduces a non-linear sigmoidal coherence-to-gain mapping that is controlled by an online estimate of the present coherence statistics. The algorithm automatically adapts to a given acoustic environment and provides a stronger dereverberation effect than the original method presented in Allen [J. Acoust. Soc. Am. 62, 912-915 (1977)] in most acoustic conditions. The performance of the proposed algorithm was objectively and subjectively evaluated in terms of its impacts on the amount of reverberation and overall quality. A binaural spectral subtraction method based on Lebart [Acta Acust. Acust. 87, 359-366 (2001)] and a binaural version of the original method of Allen were considered as reference systems. The results revealed that the proposed coherence-based approach is most successful in acoustic scenarios that exhibit a significant spread in the coherence distribution where direct sound and reverberation can be segregated. This dereverberation algorithm is thus particularly useful in large rooms for short source-receiver distances.

Original languageEnglish
Pages (from-to)2767-2777
Number of pages11
JournalJournal of the Acoustical Society of America
Volume133
Issue number5
DOIs
Publication statusPublished - May 2013

Bibliographical note

Copyright 2013 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in Journal of the Acoustical Society of America, Vol. 133, Issue 5, pp. 2767-2777, and may be found at http://doi.org/10.1121/1.4799007.

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