NDLI: Optimization of the DET curve in speaker verification

Content Provider	IEEE Xplore Digital Library
Author	Garcia-Perera, L.P. Nolazco-Flores, J.A. Raj, B. Stern, R.
Copyright Year	2012
Description	Author affiliation: Tecnologico de Monterrey, Campus Monterrey, Computer Science Department, Monterrey, NL, Mexico (Garcia-Perera, L.P.; Nolazco-Flores, J.A.) \|\| Carnegie Mellon University, Language Technolgy Institute, Pittsburgh, PA, USA (Raj, B.; Stern, R.)
Abstract	Speaker verification systems are, in essence, statistical pattern detectors which can trade off false rejections for false acceptances. Any operating point characterized by a specific tradeoff between false rejections and false acceptances may be chosen. Training paradigms in speaker verification systems however either learn the parameters of the classifier employed without actually considering this tradeoff, or optimize the parameters for a particular operating point exemplified by the ratio of positive and negative training instances supplied. In this paper we investigate the optimization of training paradigms to explicitly consider the tradeoff between false rejections and false acceptances, by minimizing the area under the curve of the detection error tradeoff curve. To optimize the parameters, we explicitly minimize a mathematical characterization of the area under the detection error tradeoff curve, through generalized probabilistic descent. Experiments on the NIST 2008 database show that for clean signals the proposed optimization approach is at least as effective as conventional learning. On noisy data, verification performance obtained with the proposed approach is considerably better than that obtained with conventional learning methods.
Starting Page	318
Ending Page	323
File Size	315096
Page Count	6
File Format	PDF
ISBN	9781467351256
e-ISBN	9781467351263
e-ISBN	9781467351249
DOI	10.1109/SLT.2012.6424243
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Adaptation models minimum verification error Vectors discriminative training Equations Training joint factor analysis detection error tradeoff detection cost function Speech Data models Mathematical model Speaker verification
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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