Jaw Tracking
In short: Jaw tracking monitors the vertical and lateral movement of the jaw during speech, providing essential data for generating accurate open and closed mouth positions in lip sync.
About Jaw Tracking
Jaw tracking isolates the movement of the lower jaw from the rest of the facial motion, capturing how wide the mouth opens and any lateral shifts during speech. Jaw movement is one of the most visually prominent components of speaking and is closely correlated with speech loudness and vowel openness.
In lip sync systems, jaw tracking data can be extracted from facial landmarks or predicted directly from audio features like energy and formant frequencies. Accurate jaw tracking is particularly important for expressive speech, singing, and languages with wide jaw excursions, where incorrect jaw amplitude immediately looks unnatural.
How Jaw Tracking Connects to Lip Sync
Jaw Tracking relates to several other concepts in the AI lip sync pipeline: Face Landmark Detection , and Mouth Shape .
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