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Evaluation of Speaker Anonymization on Emotional Speech

Hubert Nourtel 1 Pierre Champion 1, 2 Denis Jouvet 1 Anthony Larcher 2 Marie Tahon 2 
1 MULTISPEECH - Speech Modeling for Facilitating Oral-Based Communication
Inria Nancy - Grand Est, LORIA - NLPKD - Department of Natural Language Processing & Knowledge Discovery
Abstract : Speech data carries a range of personal information, such as the speaker's identity and emotional state. These attributes can be used for malicious purposes. With the development of virtual assistants, a new generation of privacy threats has emerged. Current studies have addressed the topic of preserving speech privacy. One of them, the VoicePrivacy initiative aims to promote the development of privacy preservation tools for speech technology. The task selected for the VoicePrivacy 2020 Challenge (VPC) is about speaker anonymization. The goal is to hide the source speaker's identity while preserving the linguistic information. The baseline of the VPC makes use of a voice conversion. This paper studies the impact of the speaker anonymization baseline system of the VPC on emotional information present in speech utterances. Evaluation is performed following the VPC rules regarding the attackers' knowledge about the anonymization system. Our results show that the VPC baseline system does not suppress speakers' emotions against informed attackers. When comparing anonymized speech to original speech, the emotion recognition performance is degraded by 15% relative to IEMOCAP data, similar to the degradation observed for automatic speech recognition used to evaluate the preservation of the linguistic information.
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Submitted on : Thursday, October 14, 2021 - 12:16:34 PM
Last modification on : Friday, July 15, 2022 - 12:22:05 PM
Long-term archiving on: : Saturday, January 15, 2022 - 6:45:09 PM


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  • HAL Id : hal-03377797, version 1


Hubert Nourtel, Pierre Champion, Denis Jouvet, Anthony Larcher, Marie Tahon. Evaluation of Speaker Anonymization on Emotional Speech. SPSC 2021 - 1st ISCA Symposium on Security and Privacy in Speech Communication, Nov 2021, Virtual, Germany. ⟨hal-03377797⟩



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