Toshihiko Itoh

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This paper presents the characteristic differences of linguistic and acoustic features observed in different spoken dialogue situations and with different dialogue partners: human-human vs. human-machine interactions. We compare the linguistic and acoustic features of the user’s speech to a spoken dialogue system and to a human operator in several goal(More)
We consider that factors such as prosody of systems’ utterances and dialogue rhythm are important to attain a natural human-machine dialogue. However, the relations between dialogue rhythm and speaker’s various states in task-oriented dialogue have been not revealed. In this study, we collected taskoriented dialogues and analyzed the relations between(More)
This paper presents the characteristic differences of linguistic and acoustic features observed in different spoken dialogue situations and with different dialogue partners: human-human vs. humanmachine interactions. And it also presents influences of awareness of users on those characteristics. We compare the linguistic and acoustic features of the user’s(More)
To verify the validity of analysis results relating to dialogue rhythm from earlier studies, we produced spoken dialogues based on analysis results relating to response timing and the other spoken dialogues, and performed subjective experiments to investigate parameters such as the naturalness of the dialogue, the incongruity of the synthesized speech, and(More)
Although car-navigation systems attract attention as one of spoken dialogue interfaces, recognition errors due to the influence of natural speech and surrounding noise may prevent a smooth dialogue and disappoint the user. Thus, this research aims at the construction of a dialogue system which can achieve a smooth dialogue and a high degree of user(More)
A prosodic labeling support system has been developed. Large-scale prosodic databases are strongly desired for years, however, the construction of databases depend on hand labeling, because of the variety of prosody. We aim at not automating the whole labeling process, but making the hand labeling work more efficient by providing the labelers with the(More)
A very detailed segmentation of prosodic phrase was carried out in order to construct a Japanese prosodic database. Boundaries correspond to junctures between phrases including C|C and V|V clusters. The "prosodic phrase" we introduced as a unit of the segmentation was defined and regarded as a unit of language speech perception. For the exact segmentation,(More)