Contextual constraints based on dialogue models in database search task for spoken dialogue systems

Kazunori Komatani, Naoyuki Kanda, Tetsuya Ogata, Hiroshi G. Okuno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

This paper describes the incorporation of contextual information into spoken dialogue systems in the database search task. Appropriate dialogue modeling is required to manage automatic speech recognition (ASR) errors using dialogue-level information. We define two dialogue models: a model for dialogue flow and a model of structured dialogue history. The model for dialogue flow assumes dialogues in the database search task consist of only two modes. In the structured dialogue history model, query conditions are maintained as a tree structure, taking into consideration their inputted order. The constraints derived from these models are integrated by using a decision tree learning, so that the system can determine a dialogue act of the utterance and whether each content word should be accepted or rejected, even when it contains ASR errors. The experimental result showed that our method could interpret content words better than conventional one without the contextual information. Furthermore, it was also shown that our method was domain-independent because it achieved equivalent accuracy in another domain with-out any more training.

Original languageEnglish
Title of host publication9th European Conference on Speech Communication and Technology
Pages877-880
Number of pages4
Publication statusPublished - 2005
Externally publishedYes
Event9th European Conference on Speech Communication and Technology - Lisbon
Duration: 2005 Sep 42005 Sep 8

Other

Other9th European Conference on Speech Communication and Technology
CityLisbon
Period05/9/405/9/8

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Komatani, K., Kanda, N., Ogata, T., & Okuno, H. G. (2005). Contextual constraints based on dialogue models in database search task for spoken dialogue systems. In 9th European Conference on Speech Communication and Technology (pp. 877-880)