Tracking multiple audio sources with the von mises distribution and variational EM
File(s)
Accepted version
OA Location
Author(s)
Ban, Yutong
Alameda-Pineda, Xavier
Evers, Christine
Horaud, Radu
Type
Journal Article
Abstract
In this paper we address the problem of simultaneously tracking several moving audio sources, namely the problem of estimating source trajectories from a sequence of observed features. We propose to use the von Mises distribution to model audio-source directions of arrival with circular random variables. This leads to a Bayesian filtering formulation which is intractable because of the combinatorial explosion of associating observed variables with latent variables, over time. We propose a variational approximation of the filtering distribution. We infer a variational expectation-maximization algorithm that is both computationally tractable and time efficient. We propose an audio-source birth method that favors smooth source trajectories and which is used both to initialize the number of active sources and to detect new sources. We perform experiments with the recently released LOCATA dataset comprising two moving sources and a moving microphone array mounted onto a robot.
Date Issued
2019-06-01
Date Acceptance
2019-03-21
Citation
IEEE Signal Processing Letters, 2019, 26 (6), pp.798-802
ISSN
1070-9908
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Start Page
798
End Page
802
Journal / Book Title
IEEE Signal Processing Letters
Volume
26
Issue
6
Copyright Statement
© 2019 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
Engineering & Physical Science Research Council (E
Grant Number
EP/P001017/1
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Engineering
Multiple target tracking
bayesian filtering
von mises distribution
variational approximation
EM
ACOUSTIC SOURCE
FILTER
0906 Electrical and Electronic Engineering
1005 Communications Technologies
Networking & Telecommunications
Publication Status
Published
Date Publish Online
2019-03-29