ISCA Archive Interspeech 2023
ISCA Archive Interspeech 2023

Two-Stage Voice Anonymization for Enhanced Privacy

Francesco Nespoli, Daniel Barreda, Jöerg Bitzer, Patrick A. Naylor

In recent years, the need for privacy preservation when manipulating or storing personal data, including speech , has become a major issue. In this paper, we present a system addressing the speaker-level anonymization problem. We propose and evaluate a two-stage anonymization pipeline exploiting a state-of-the-art anonymization model described in the Voice Privacy Challenge 2022 in combination with a zero-shot voice conversion architecture able to capture speaker characteristics from a few seconds of speech. We show this architecture can lead to strong privacy preservation while preserving pitch information. Finally, we propose a new compressed metric to evaluate anonymization systems in privacy scenarios with different constrains on privacy and utility.