Spoofing countermeasures to protect automatic speaker verification from voice conversion

This paper presents a new countermeasure for the protection of automatic speaker verification systems from spoofed, converted voice signals. The new countermeasure exploits the common shift applied to the spectral slope of consecutive speech frames involved in the mapping of a spoofer's voice s...

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Bibliographic Details
Main Authors: Alegre, Federico, Amehraye, Asmaa, Evans, Nicholas
Format: Conference Proceeding
Language:English
Subjects:
Abstracts
automatic speaker verification
biometrics
countermeasures
imposture
Speech
spoofing
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Description
Summary:This paper presents a new countermeasure for the protection of automatic speaker verification systems from spoofed, converted voice signals. The new countermeasure exploits the common shift applied to the spectral slope of consecutive speech frames involved in the mapping of a spoofer's voice signal towards a statistical model of a given target. While the countermeasure exploits prior knowledge of the attack in an admittedly unrealistic sense, it is shown to detect almost all spoofed signals which otherwise provoke significant increases in false acceptance. The work also discusses the need for formal evaluations to develop new countermeasures which are less reliant on prior knowledge.
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2013.6638222