Exploiting structures of temporal causality for robust speaker localization in reverberant environments

Christopher Schymura, Peng Guo, Yanir Maymon, Boaz Rafaely, Dorothea Kolossa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper introduces a framework for robust speaker localization in reverberant environments based on a causal analysis of the temporal relationship between direct sound and corresponding reflections. It extends previously proposed localization approaches for spherical microphone arrays based on a direct-path dominance test. So far, these methods are applied in the time-frequency domain without considering the temporal context of direction-of-arrival measurements. In this work, a causal analysis of the temporal structure of subsequent directions-of-arrival estimates based on the Granger causality test is proposed. The cause-effect relationship between estimated directions is modeled via a causal graph, which is used to distinguish the direction of the direct sound from corresponding reflections. An experimental evaluation in simulated acoustic environments shows that the proposed approach yields an improvement in localization performance especially in highly reverberant conditions.

Original languageEnglish
Title of host publicationLatent Variable Analysis and Signal Separation - 14th International Conference, LVA/ICA 2018, Proceedings
EditorsSharon Gannot, Yannick Deville, Russell Mason, Mark D. Plumbley, Dominic Ward
PublisherSpringer Verlag
Pages228-237
Number of pages10
ISBN (Print)9783319937632
DOIs
StatePublished - 1 Jan 2018
Event14th International Conference on Latent Variable Analysis and Signal Separation, LVA/ICA 2018 - Guildford, United Kingdom
Duration: 2 Jul 20185 Jul 2018

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume10891 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference14th International Conference on Latent Variable Analysis and Signal Separation, LVA/ICA 2018
Country/TerritoryUnited Kingdom
CityGuildford
Period2/07/185/07/18

Keywords

  • Multivariate granger causality test
  • Speaker localization
  • Spherical microphone arrays
  • Vector autoregressive models

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