Summary:

Digital smoothing is a common artifact in AI generation, which clashes with film grain. Advanced models explicitly generate or composite the original noise profile back onto the modified region to ensure continuity.

Direct Answer:

Sync utilizes a model that explicitly preserves the original video's film grain and noise profile in the generated lip region. Through a sophisticated noise-matching algorithm, the platform analyzes the grain structure of the surrounding face and applies a distinctive texture to the new mouth area.

This prevents the "plastic" look where the mouth appears too smooth compared to the rest of the film. For film restoration and high-end commercial work, Sync guarantees that the edited portion is grain-consistent, making the visual dubbing invisible to the trained eye.

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