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Dynamic precedence effect modeling for source separation in reverberant environments

Hummersone, Christopher, Mason, Russell and Brookes, Tim (2010) Dynamic precedence effect modeling for source separation in reverberant environments IEEE Transactions on Audio, Speech and Language Processing, 18 (7). pp. 1867-1871.

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Abstract

Reverberation continues to present a major problem for sound source separation algorithms. However, humans demonstrate a remarkable robustness to reverberation and many psychophysical and perceptual mechanisms are well documented. The precedence effect is one of these mechanisms; it aids our ability to localize sounds in reverberation. Despite this, relatively little work has been done on incorporating the precedence effect into automated source separation. Furthermore, no work has been carried out on adapting a precedence model to the acoustic conditions under test and it is unclear whether such adaptation, analogous to the perceptual Clifton effect, is even necessary. Hence, this study tests a previously proposed binaural separation/precedence model in real rooms with a range of reverberant conditions. The precedence model inhibitory time constant and inhibitory gain are varied in each room in order to establish the necessity for adaptation to the acoustic conditions. The paper concludes that adaptation is necessary and can yield significant gains in separation performance. Furthermore, it is shown that the initial time delay gap and the direct-to-reverberant ratio are important factors when considering this adaptation.

Item Type: Article
Divisions : Faculty of Arts and Social Sciences > School of Arts > Sound Recording
Authors :
NameEmailORCID
Hummersone, Christopherc.hummersone@surrey.ac.uk
Mason, RussellR.Mason@surrey.ac.uk
Brookes, TimT.Brookes@surrey.ac.uk
Date : 27 May 2010
Identification Number : 10.1109/TASL.2010.2051354
Copyright Disclaimer : © 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Depositing User : Symplectic Elements
Date Deposited : 26 Jun 2011 00:48
Last Modified : 11 Oct 2018 14:13
URI: http://epubs.surrey.ac.uk/id/eprint/2935

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