A Constraint‐Based Approach to Visual Speech for a Mexican‐Spanish Talking Head
Oscar M. Martinez Lazalde, Steve Maddock, Michael P. Meredith · International Journal of Computer Games Technology · 2008
A common approach to produce visual speech is to interpolate the parameters describing a sequence of mouth shapes, known as visemes, where a viseme corresponds to a phoneme in an utterance. The interpolation process must consider the issue of context‐dependent shape, or coarticulation, in order to produce realistic‐looking speech. We describe an approach to such pose‐based interpolation that deals with coarticulation using a constraint‐based technique. This is demonstrated using a Mexican‐Spanish talking head, which can vary its speed of talking and produce coarticulation effects.