Understanding Lip-Sync Technology in Wan 2.5

Wan 2.5 introduced a revolutionary approach to lip-sync in AI video generation through its native multimodal architecture.

Unlike previous approaches that treated audio and video as separate modalities, Wan 2.5 processes them together in a unified framework. This allows for much more accurate synchronization between mouth movements and speech.

The technology analyzes phonemes in the audio input and generates corresponding visemes (visual mouth shapes) in real-time during the generation process. This results in natural-looking speech that passes the uncanny valley test.

This capability has opened up new use cases including virtual anchors, digital humans, and dubbing applications.