Animação facial sincronizada com a fala : visemas dependentes do contexto fonetico para o portugues do Brasil / Speech synchronized facial animation: phonetic context dependent visemes for Brazilian portuguese

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Computer facial animation refers to the techniques for specifying and controlling the positioning, motion, and appearance of a synthetic face over time. Speech synchronized facial animation addres-ses the control of a virtual face conducted by the phonetic events of an utterance. Such control implies the manipulation of the virtual face synchronized and coordinated with the speech signal. The coor-dination is achieved by reproducing on the virtual face the visible articulatory movements necessary for speech production. The objective of the work is to study and propose a methodology to establish representations for, the visual articulatory pattems displayed on the face during speech production, the so called visemes. The proposed methodology identifies phonetic context dependent visemes that cope with persevera tive and anticipatory coarticulation. Additionally, the movements of the temporo-mandibular joint and the lip tissue are modelled from a set of visemes established by the analysis of a Brazilian Portuguese linguistic corpus. Although the corpus is restricted to Brazilian Portuguese, the methodology is general enough to be applied to other languages

ASSUNTO(S)

computação grafica animação por computador computer animation computer graphics

ACESSO AO ARTIGO

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