I-vector based speaker recognition using advanced channel compensation techniques

Kanagasundaram, Ahilan, Dean, David, Sridharan, Sridha, McLaren, Mitchell L., & Vogt, Robbie (2014) I-vector based speaker recognition using advanced channel compensation techniques. Computer Speech and Language, 28(1), pp. 121-140.

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This paper investigates advanced channel compensation techniques for the purpose of improving i-vector speaker verification performance in the presence of high intersession variability using the NIST 2008 and 2010 SRE corpora. The performance of four channel compensation techniques:

(a) weighted maximum margin criterion (WMMC),

(b) source-normalized WMMC (SN-WMMC),

(c) weighted linear discriminant analysis (WLDA), and;

(d) source-normalized WLDA (SN-WLDA) have been investigated.

We show that, by extracting the discriminatory information between pairs of speakers as well as capturing the source variation information in the development i-vector space, the SN-WLDA based cosine similarity scoring (CSS) i-vector system is shown to provide over 20% improvement in EER for NIST 2008 interview and microphone verification and over 10% improvement in EER for NIST 2008 telephone verification, when compared to SN-LDA based CSS i-vector system. Further, score-level fusion techniques are analyzed to combine the best channel compensation approaches, to provide over 8% improvement in DCF over the best single approach, (SN-WLDA), for NIST 2008 interview/ telephone enrolment-verification condition. Finally, we demonstrate that the improvements found in the context of CSS also generalize to state-of-the-art GPLDA with up to 14% relative improvement in EER for NIST SRE 2010 interview and microphone verification and over 7% relative improvement in EER for NIST SRE 2010 telephone verification.

Impact and interest:

13 citations in Scopus
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7 citations in Web of Science®

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55 since deposited on 01 May 2013
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ID Code: 59522
Item Type: Journal Article
Refereed: Yes
Keywords: Speaker verification, I-vector, GPLDA, LDA, SN-LDA, WLDA, SN-WLDA
DOI: 10.1016/j.csl.2013.04.002
ISSN: 0885-2308
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Past > Institutes > Information Security Institute
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier
Deposited On: 01 May 2013 01:05
Last Modified: 04 Jan 2016 02:15

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