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Modeling the Comb Filter Effect and Interaural Coherence for Binaural Source Separation

Remaggi, Luca, Jackson, Philip J. B. and Wang, Wenwu (2019) Modeling the Comb Filter Effect and Interaural Coherence for Binaural Source Separation IEEE/ACM Transactions on Audio, Speech, and Language Processing. pp. 1-14.

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Typical methods for binaural source separation consider only the direct sound as the target signal in a mixture. However, in most scenarios, this assumption limits the source separation performance. It is well known that the early reflections interact with the direct sound, producing acoustic effects at the listening position, e.g. the so-called comb filter effect. In this article, we propose a novel source separation model, that utilizes both the direct sound and the first early reflection information to model the comb filter effect. This is done by observing the interaural phase difference obtained from the timefrequency representation of binaural mixtures. Furthermore, a method is proposed to model the interaural coherence of the signals. Including information related to the sound multipath propagation, the performance of the proposed separation method is improved with respect to the baselines that did not use such information, as illustrated by using binaural recordings made in four rooms, having different sizes and reverberation times.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Jackson, Philip J.
Date : 7 October 2019
Funders : Engineering and Physical Sciences Research Council (EPSRC), BBC Audio Research Partnership
DOI : 10.1109/TASLP.2019.2946043
Grant Title : Programme Grant S3A: Future Spatial Audio for an Immersive Listener Experience at Home
Copyright Disclaimer : © 2019 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See for more information.
Uncontrolled Keywords : Source separation; Comb filter effect; RIRs; IPD; ILD; Binaural audio; Multipath propagation; Interaural coherence; Integrated circuit modeling; Speech processing; Reverberation; Coherence
Depositing User : Clive Harris
Date Deposited : 18 Oct 2019 12:01
Last Modified : 18 Oct 2019 12:01

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