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Overall performance metrics for multi-condition Speaker Recognition Evaluations

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Author: Leeuwen, D.A. van
Type:article
Date:2009
Institution: TNO Defensie en Veiligheid
Source:Interspeech 2009, september, Brighton, UK.
Identifier: 93999
Keywords: Acoustics and Audiology · automatic speech recognition · speech

Abstract

In this paper we propose a framework for measuring the overall performance of an automatic speaker recognition system using a set of trials of a heterogeneous evaluation such as NIST SRE- 2008, which combines several acoustic conditions in one evaluation. We do this by weighting trials of different conditions according to their relative proportion, and we derive expressions for the basic speaker recognition performance measures Cdet, Cllr, as well as the DET curve, from which EER and Cmin det can be computed. Examples of pooling of conditions are shown on SRE-2008 data, including speaker sex and microphone type and speaking style.