Giovanni Soldi

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The potential for biometric systems to be manipulated through some form of subversion is well acknowledged. One such approach known as spoofing relates to the provocation of false accepts in authentication applications. Another approach referred to as obfuscation relates to the provocation of missed detections in surveillance applications. While the(More)
Phone adaptive training (PAT) aims to derive a new acoustic feature space in which the influence of phone variation is minimised while that of speaker variation is maximised. Originally proposed in the context of speaker diarization, our most recent work showed the utility of PAT in short-duration, automatic speaker verification where phone variation(More)
Speaker diarization aims to determine 'who spoke when' in a given audio stream. Different applications, such as document structuring or information retrieval have led to the exploration of speaker di-arization in many different domains, from broadcast news to lectures , phone conversations and meetings. Almost all current diariza-tion systems are offline(More)
This paper presents the first investigation of evasion and obfuscation in the context of speaker recognition surveillance and forensics. In contrast to spoofing, which aims to provoke false acceptances in authentication applications, evasion and obfuscation target detection and recognition modules in order to provoke missed detections. The paper presents(More)
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