Yasuhisa Niimi

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Voice-mail and video-mail systems for the Internet are becoming very popular, because the speech and video compression technology is greatly improved in these days. Asynchronous voice-mail system, however , does not seem attractive because it's not designed for discussions. We propose a network-based voice conference system which enables asynchronous and(More)
This paper considers a dialog control strategy based on the reliability of speech recognition. The spoken dialog system using this strategy accepts an utterance of the user if the reliability is high, while it rejects the utterance and asks the user to speak again (the basic strategy), or conrms the content of the utterance if the reliability is low. The(More)
This paper presents a task-independent dialogue control scheme, which is an extension of the frame-driven method. A spoken dialogue system, SDSKIT-3, which is based on this scheme, has been developed for the tourist information service and has demonstrated it can manage problems which are encountered in a spoken dialogue system. The scheme is transported to(More)
This paper describes a system to synthesize emotional speech based on TDPLOSA. The system has a database of VCV (vowel consonant vowel) segments for each of three emotions; anger, sadness and joy. These segments have emotional speech quality. The database contains four kinds of VCV segments which are prosodically balanced in the sense that their(More)
This paper proposes and analyzes mathematically an interactive strategy to recover from misrecognition of utterances including multiple information items through a short conversation with a speaker. First the speech rec-ognizer in a dialogue system recognizes an utterance and evaluates the reliability of each item contained in it. The dialogue system(More)
A voice communication system for asynchronous meetings held in non-real time will attract a broad range of users because it is convenient and easy to use with mobile devices. To realize such a system, however, it will be necessary to make possible the natural input of the progressive process of speech at the same time as facilitating the quotation of audio(More)
We propose a semi-automatic dialogue system generator from the Internet information contents. We classify the practical Web site into three classes of task: slot-filling, database search, and explanation. Using three levels of dialogue library for each task, our generator translates XML based Web site into VoiceXML, which controls a conversation between a(More)
This paper presents an approach to extraction of dialog acts and topics from utterances in a spoken dialog system. Two knowledge sources are used to describe the dialog history. One is a transition network of dialog acts and the other is a tree of topics which might appear in domain communications. Dialog acts and topics are extracted through bottom-up and(More)