Single-Model Attribution for Spoofed Speech via Vocoder Fingerprints in an Open-World Setting

• URL: http://arxiv.org/abs/2411.14013v1
• Date: Thu, 21 Nov 2024 10:55:49 GMT
• Title: Single-Model Attribution for Spoofed Speech via Vocoder Fingerprints in an Open-World Setting
• Authors: Matías Pizarro, Mike Laszkiewicz, Dorothea Kolossa, Asja Fischer,
• Abstract summary: We are the first to tackle the single-model attribution task in an open-world setting. We show that the standardized average residual between audio signals and their low-pass filtered or EnCodec filtered versions can serve as powerful vocoder fingerprints.
• Score: 16.874077503217677
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: As speech generation technology advances, so do the potential threats of misusing spoofed speech signals. One way to address these threats is by attributing the signals to their source generative model. In this work, we are the first to tackle the single-model attribution task in an open-world setting, that is, we aim at identifying whether spoofed speech signals from unknown sources originate from a specific vocoder. We show that the standardized average residual between audio signals and their low-pass filtered or EnCodec filtered versions can serve as powerful vocoder fingerprints. The approach only requires data from the target vocoder and allows for simple but highly accurate distance-based model attribution. We demonstrate its effectiveness on LJSpeech and JSUT, achieving an average AUROC of over 99% in most settings. The accompanying robustness study shows that it is also resilient to noise levels up to a certain degree.

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