Diffusion-based Unsupervised Audio-visual Speech Enhancement

• URL: http://arxiv.org/abs/2410.05301v1
• Date: Fri, 4 Oct 2024 12:22:54 GMT
• Title: Diffusion-based Unsupervised Audio-visual Speech Enhancement
• Authors: Jean-Eudes Ayilo, Mostafa Sadeghi, Romain Serizel, Xavier Alameda-Pineda,
• Abstract summary: This paper proposes a new unsupervised audiovisual speech enhancement (AVSE) approach. It combines a diffusion-based audio-visual speech generative model with a non-negative matrix factorization (NMF) noise model. Experimental results confirm that the proposed AVSE approach not only outperforms its audio-only counterpart but also generalizes better than a recent supervisedgenerative AVSE method.
• Score: 26.937216751657697
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: This paper proposes a new unsupervised audiovisual speech enhancement (AVSE) approach that combines a diffusion-based audio-visual speech generative model with a non-negative matrix factorization (NMF) noise model. First, the diffusion model is pre-trained on clean speech conditioned on corresponding video data to simulate the speech generative distribution. This pre-trained model is then paired with the NMF-based noise model to iteratively estimate clean speech. Specifically, a diffusion-based posterior sampling approach is implemented within the reverse diffusion process, where after each iteration, a speech estimate is obtained and used to update the noise parameters. Experimental results confirm that the proposed AVSE approach not only outperforms its audio-only counterpart but also generalizes better than a recent supervisedgenerative AVSE method. Additionally, the new inference algorithm offers a better balance between inference speed and performance compared to the previous diffusion-based method.

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