Scatter Difference NAP for SVM Speaker Recognition

Authors:
Brendan Baker;Robbie Vogt;Mitchell Mclaren;Sridha Sridharan
Affiliations:
Speech and Audio Research Laboratory, Queensland University of Technology, Brisbane, AUSTRALIA 4001;Speech and Audio Research Laboratory, Queensland University of Technology, Brisbane, AUSTRALIA 4001;Speech and Audio Research Laboratory, Queensland University of Technology, Brisbane, AUSTRALIA 4001;Speech and Audio Research Laboratory, Queensland University of Technology, Brisbane, AUSTRALIA 4001
Venue:
ICB '09 Proceedings of the Third International Conference on Advances in Biometrics
Year:
2009

Citing 2
Cited 2

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Abstract

This paper presents Scatter Difference Nuisance Attribute Projection (SD-NAP) as an enhancement to NAP for SVM-based speaker verification. While standard NAP may inadvertently remove desirable speaker variability, SD-NAP explicitly de-emphasises this variability by incorporating a weighted version of the between-class scatter into the NAP optimisation criterion. Experimental evaluation of SD-NAP with a variety of SVM systems on the 2006 and 2008 NIST SRE corpora demonstrate that SD-NAP provides improved verification performance over standard NAP in most cases, particularly at the EER operating point.