Modélisation de la coarticulation labiale : mise en oeuvre sur une tête parlante

Abstract : This thesis comes within the scope of talking heads. We are particularly interested in the prediction of labial and jaw coarticulation movements. After analyzing intra and inter speaker variability using two corpora, we defined a prediction algorithm for anticipatory coarticulation based on phonetic rules which takes into account interactions between articulators. We then proposed a solution to estimate labial and jaw movements using a one speaker corpus. It consists in concatenating elementary VC...CV sequences selected by our prediction algorithm and either extracted from the corpus or rebuilt by completion. We modeled articulatory movements using sigmoids which offer the advantage of considerably reducing the model size and which are adaptable to speaking rate or articulatory strategies. Additionally, sigmoids are able to keep distinctive contrasts between neighboring segments as well as intrinsic characteristics of the sounds. With the aim of estimating the quality of our synthesis process, we measured differences between real and predicted data for all the sentences of the corpus et we compared our solution with Cohen and Massaro 's algorithm. It turns out that our solution is better for specific VCCV sequences in which anticipation is more complex.
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Vincent Robert. Modélisation de la coarticulation labiale : mise en oeuvre sur une tête parlante. Autre [cs.OH]. Université Henri Poincaré - Nancy 1, 2008. Français. ⟨NNT : 2008NAN10077⟩. ⟨tel-01748431⟩

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