RESUMEDans le cadre du développement d'un assistant personnel pour voyageurs, nous étudions trois types d'interfaces multimodales pour PDA : 1) la combinaison de Control menus et d'entrées vocales pour contrôler des interfaces zoomables vers des bases de données de type graphique ou textuelles, 2) l'affinement d'images captées par la caméra intégrée, basé sur la corrélation d'une série d'images, pour améliorer la reconnaissance de caractères, et 3) des agent conversationnels animés enrichis de comportements et de gestes culturels. Nous présentons ici ces trois modalités et leur intégration dans l'application globale. ABSTRACTAs a part of a project to develop a personal assistant for travellers, we have studied three types of multimodal interfaces for a PDA: 1) a combination of Control menus and vocal inputs to control zoomable user interfaces to graphical or textual databases, 2) refinement of pictures captured by the integrated camera, based on correlating a series of pictures, in order to enhance character recognition, and 3) embodied conversational agents able to communicate via synchronized speech and culturedependent nonverbal behaviors (face, gaze and gesture). We describe in this paper these three modalities and their integration in the main application.
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