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  4. Statistical Evaluation of Biometric Evidence in Forensic Automatic Speaker Recognition
 
conference paper

Statistical Evaluation of Biometric Evidence in Forensic Automatic Speaker Recognition

Drygajlo, Andrzej  
2009
Computational Forensics, Proceedings
3rd International Workshop on Computational Forensics

Forensic speaker recognition is the process of determining if a specific individual (suspected speaker) is the source of a questioned voice recording (trace). This paper aims at presenting forensic automatic speaker recognition (FASR) methods that provide a coherent way of quantifying and presenting recorded voice as biometric evidence. In such methods, the biometric evidence consists of the quantified degree of similarity between speaker-dependent features extracted from the trace and speaker-depeiident features extracted from recorded speech of a suspect. The interpretation of recorded voice as evidence in the forensic context presents particular challenges, including within-speaker (within-source) variability and between-speakers (between-sources) variability. Consequently, FASR methods must provide a statistical evaluation which gives the court all indication of the strength of the evidence given the estimated with in-source and between-sources variabilities. This paper reports on the first ENFSI evaluation campaign through a fake case, organized by the Netherlands Forensic Institute (NFI), as an example, where an automatic method using the Gaussian mixture models (GMMs) and the Bayesian interpretation (BI) framework were implemented for the forensic speaker recognition task.

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Type
conference paper
DOI
10.1007/978-3-642-03521-0_1
Web of Science ID

WOS:000270323000001

Author(s)
Drygajlo, Andrzej  
Date Issued

2009

Publisher

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa

Published in
Computational Forensics, Proceedings
Series title/Series vol.

Lecture Notes in Computer Science; 5718

Start page

1

End page

12

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIDIAP  
Event nameEvent placeEvent date
3rd International Workshop on Computational Forensics

The Hague, NETHERLANDS

Aug 13-14, 2009

Available on Infoscience
November 30, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/59819
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