FaceFX
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FaceFX is a Facial animation program developed by OC3 Entertainment. It was designed to create realistic Lip synchronization from audio files in computer games.
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[edit] Face Graph
The central component of the program is the face graph. It combines bone poses and morph targets to a single target which is driven by animation curves. These are created by a speech recognition system but can also be manually edited. The facial animation is then outputted to the game engine either as bone transformation or morph target frame by frame.
[edit] Audio Analysis
To create a realistic animation curve, the program recognizes 42 phonemes and tries to take co-articulation rules into account. It also tries to create head movement, blinks, and eyebrow raises from emphasis points in the audio file.