1. Abboud B, Davoine F, Dang M (2004) Facial expression recognition and synthesis based on an appearance model. Sig Process: Image Commun. doi: 10.1016/j.image.2004.05.009
2. Bilmes J, Zweig G (2002) The graphical models toolkit: an open source software system for speech and time series processing. Proc IEEE Int Conf Acoust, Speech, Signal Process 4:3916–3919
3. Brand M (1999) Voice puppetry. SIGGRAPH ’99 proceedings of the 26th annual conference on computer graphics and interactive techniques, pp. 21–28
4. Bregler C, Covell M, Slaney M (2006) Video rewrite: driving visual speech with audio. Computer graphics annual conference series (SIGGRAPH), 353–360, Los Angeles, California
5. Choi K, Luo Y, Hwang J (2001) Hidden Markov model inversion for audio-to-visual conversion in an MPEG-4 facial animation system. J VLSI Signal Process 29:51–61