A spoken dialog system for chat-like conversations considering response timing

Authors:
Ryota Nishimura;Norihide Kitaoka;Seiichi Nakagawa
Affiliations:
Department of Information and Computer Sciences, Toyohashi University of Technology, Japan;Graduate School of Information Science, Nagoya University, Japan;Department of Information and Computer Sciences, Toyohashi University of Technology, Japan
Venue:
TSD'07 Proceedings of the 10th international conference on Text, speech and dialogue
Year:
2007

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Abstract

If a dialog system can respond to a user as naturally as a human, the interaction will be smoother. In this research, we aim to develop a dialog system by emulating the human behavior in a chat-like dialog. In this paper, we developed a dialog system which could generate chat-like responses and their timing using a decision tree. The system could perform "collaborative completion," "aizuchi" (back-channel) and so on. The decision tree utilized the pitch and the power contours of user's utterance, recognition hypotheses, and response preparation status of the response generator, at every time segment as features to generate response timing.