Automatic-type calibration of traditionally derived likelihood ratios: Forensic analysis of Australian English /o/ formant trajectories

Research output: Chapter in Book/Report/Conference proceedingConference publication

Abstract

A traditional-style phonetic-acoustic forensic-speaker-recognition analysis was conducted on Australian English /o/ recordings. Different parametric curves were fitted to the formant trajectories of the vowel tokens, and cross-validated likelihood ratios were calculated using a single-stage generative multivariate kernel density formula. The outputs of different systems were compared using C llr, a metric developed for automatic speaker recognition, and the cross-validated likelihood ratios were calibrated using a procedure developed for automatic speaker recognition. Calibration ameliorated some likelihood-ratio results which had offered strong support for a contrary-to-fact hypothesis.

Original languageEnglish
Title of host publicationProceedings of the Annual Conference of the International Speech Communication Association
Subtitle of host publicationINTERSPEECH 2008
Pages1501-1504
Number of pages4
Publication statusPublished - 2008
Event9th Annual Conference of the International Speech Communication Association - Brisbane, Australia
Duration: 22 Sep 200826 Sep 2008

Publication series

NameProceedings of Interspeech
ISSN (Print)1990 9772

Conference

Conference9th Annual Conference of the International Speech Communication Association
CountryAustralia
CityBrisbane
Period22/09/0826/09/08

Bibliographical note

Copyright © 2008 ISCA

Keywords

  • Calibration
  • Forensic speaker recognition
  • Formant trajectories

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