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

Geoffrey Stewart Morrison; Yuko Kinoshita

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

Geoffrey Stewart Morrison, Yuko Kinoshita

Research output: Chapter in Book/Published conference output › Conference 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 language	English
Title of host publication	Proceedings of the Annual Conference of the International Speech Communication Association
Subtitle of host publication	INTERSPEECH 2008
Pages	1501-1504
Number of pages	4
Publication status	Published - 2008
Event	9th Annual Conference of the International Speech Communication Association - Brisbane, Australia Duration: 22 Sept 2008 → 26 Sept 2008

Publication series

Name	Proceedings of Interspeech
ISSN (Print)	1990 9772

Conference

Conference	9th Annual Conference of the International Speech Communication Association
Country/Territory	Australia
City	Brisbane
Period	22/09/08 → 26/09/08

Bibliographical note

Keywords

Calibration
Forensic speaker recognition
Formant trajectories

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Automatic-Type Calibration of Traditionally Derived Likelihood Ratios
Copyright © 2008 ISCA
Accepted author manuscript, 225 KB

Cite this

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

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.",

keywords = "Calibration, Forensic speaker recognition, Formant trajectories",

author = "Morrison, {Geoffrey Stewart} and Yuko Kinoshita",

note = "Copyright {\textcopyright} 2008 ISCA; 9th Annual Conference of the International Speech Communication Association ; Conference date: 22-09-2008 Through 26-09-2008",

year = "2008",

language = "English",

series = "Proceedings of Interspeech",

pages = "1501--1504",

booktitle = "Proceedings of the Annual Conference of the International Speech Communication Association",

}

Morrison, GS & Kinoshita, Y 2008, Automatic-type calibration of traditionally derived likelihood ratios: Forensic analysis of Australian English /o/ formant trajectories. in Proceedings of the Annual Conference of the International Speech Communication Association: INTERSPEECH 2008. Proceedings of Interspeech, pp. 1501-1504, 9th Annual Conference of the International Speech Communication Association, Brisbane, Australia, 22/09/08.

Automatic-type calibration of traditionally derived likelihood ratios: Forensic analysis of Australian English /o/ formant trajectories. / Morrison, Geoffrey Stewart; Kinoshita, Yuko.
Proceedings of the Annual Conference of the International Speech Communication Association: INTERSPEECH 2008. 2008. p. 1501-1504 (Proceedings of Interspeech).

Research output: Chapter in Book/Published conference output › Conference publication

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N2 - 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.

AB - 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.

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

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

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