arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2506.03425eess.AScs.AIcs.LG

一种数据驱动的扩散方法用于音频深度伪造解释

A Data-Driven Diffusion-based Approach for Audio Deepfake Explanations

EPFL(瑞士联邦理工学院);Reality Defender Inc.(Reality Defender公司)

Petr Grinberg, Ankur Kumar, Surya Koppisetti, Gaurav Bharaj

AI总结:

本文提出了一种数据驱动的扩散方法,通过时频差异信号训练模型,以更准确地识别音频深度伪造中的伪影区域。

摘要:

在音频深度伪造检测的背景下评估可解释性技术,如SHAP和LRP,具有挑战性,因为缺乏清晰的地面真实标注。在能够获得地面真实的情况下,我们发现这些方法难以提供准确的解释。在本工作中,我们提出了一种新的数据驱动方法,用于识别深度伪造音频中的伪影区域。我们考虑了真实音频和编码音频的配对,并将时频表示中的差异作为地面真实解释。差异信号随后用作监督,训练扩散模型以在给定的编码音频中揭示深度伪造伪影。在VocV4和LibriSeVoc数据集上的实验结果表明,我们的方法在定性和定量上均优于传统可解释性技术。

英文摘要:

Evaluating explainability techniques, such as SHAP and LRP, in the context of audio deepfake detection is challenging due to lack of clear ground truth annotations. In the cases when we are able to obtain the ground truth, we find that these methods struggle to provide accurate explanations. In this work, we propose a novel data-driven approach to identify artifact regions in deepfake audio. We consider paired real and vocoded audio, and use the difference in time-frequency representation as the ground-truth explanation. The difference signal then serves as a supervision to train a diffusion model to expose the deepfake artifacts in a given vocoded audio. Experimental results on the VocV4 and LibriSeVoc datasets demonstrate that our method outperforms traditional explainability techniques, both qualitatively and quantitatively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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