arXiv Computer Vision By Kevin Stephen, Varun Menon, Timo Mertens, Nikita Drobyshev

PVSync: A Unified Lip-Sync Expert for Timing and Articulation

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PVSync is a unified model that estimates audio‑visual offset and scores phoneme‑level articulation for lip‑sync tasks. It uses window‑level contrastive learning for synchronisation and a phoneme‑level articulation objective that aligns audio and video embeddings of the same viseme class across clips. The model achieves higher correlation with human rankings and better performance on offset recovery and viseme matching benchmarks compared to existing methods.

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