Direction of Arrival Estimation in the Spherical Harmonic Domain using Subspace Pseudo-Intensity Vectors

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Title: Direction of Arrival Estimation in the Spherical Harmonic Domain using Subspace Pseudo-Intensity Vectors
Authors: Moore, AH
Evers, C
Naylor, PA
Item Type: Journal Article
Abstract: Direction of Arrival (DOA) estimation is a fundamental problem in acoustic signal processing. It is used in a diverse range of applications, including spatial filtering, speech dereverberation, source separation and diarization. Intensity vector-based DOA estimation is attractive, especially for spherical sensor arrays, because it is computationally efficient. Two such methods are presented which operate on a spherical harmonic decomposition of a sound field observed using a spherical microphone array. The first uses Pseudo-Intensity Vectors (PIVs) and works well in acoustic environments where only one sound source is active at any time. The second uses Subspace Pseudo-Intensity Vectors (SSPIVs) and is targeted at environments where multiple simultaneous sources and significant levels of reverberation make the problem more challenging. Analytical models are used to quantify the effects of an interfering source, diffuse noise and sensor noise on PIVs and SSPIVs. The accuracy of DOA estimation using PIVs and SSPIVs is compared against the state-of-the-art in simulations including realistic reverberation and noise for single and multiple, stationary and moving sources. Finally, robust performance of the proposed methods is demonstrated using speech recordings in real acoustic environments.
Issue Date: 26-Sep-2016
Date of Acceptance: 31-Aug-2016
ISSN: 2329-9290
Publisher: IEEE
Start Page: 178
End Page: 192
Journal / Book Title: IEEE/ACM Transactions on Audio, Speech, and Language Processing
Volume: 25
Issue: 1
Copyright Statement: © 2016 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.
Sponsor/Funder: Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: 609465
Keywords: Science & Technology
Engineering, Electrical & Electronic
Direction of arrival estimation
DOA localization
microphone array processing
robot audition
speaker tracking
spherical harmonics
spherical microphone array
Publication Status: Published
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering

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