Lightweight Wasserstein Audio-Visual Model for Unified Speech Enhancement and Separation
This work addresses the need for efficient and scalable unified speech processing for real-world applications, though it appears incremental as it builds on existing audio-visual methods.
The paper tackled the problem of unifying speech enhancement and separation in noisy and multi-speaker scenarios, proposing UniVoiceLite, a lightweight unsupervised audio-visual model that achieves strong performance with robust generalization.
Speech Enhancement (SE) and Speech Separation (SS) have traditionally been treated as distinct tasks in speech processing. However, real-world audio often involves both background noise and overlapping speakers, motivating the need for a unified solution. While recent approaches have attempted to integrate SE and SS within multi-stage architectures, these approaches typically involve complex, parameter-heavy models and rely on supervised training, limiting scalability and generalization. In this work, we propose UniVoiceLite, a lightweight and unsupervised audio-visual framework that unifies SE and SS within a single model. UniVoiceLite leverages lip motion and facial identity cues to guide speech extraction and employs Wasserstein distance regularization to stabilize the latent space without requiring paired noisy-clean data. Experimental results demonstrate that UniVoiceLite achieves strong performance in both noisy and multi-speaker scenarios, combining efficiency with robust generalization. The source code is available at https://github.com/jisoo-o/UniVoiceLite.