Topic estimation with domain extensibility for guiding user's out-of-grammar utterances in multi-domain spoken dialogue systems

Satoshi Ikeda, Kazunori Komatani, Tetsuya Ogata, Hiroshi G. Okuno

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

Abstract

In a multi-domain spoken dialogue system, a user's utterances are more prone to be out-of-grammar, because this kind of system deals with more tasks than a single-domain system. We defined a topic as a domain about which users want to find more information, and we developed a method of recovering out-of-grammar utterances based on topic estimation, i.e., by providing a help message in the estimated domain. Moreover, the domain extensibility, that is, to facilitate adding new domains, should be inherently retained in multi-domain systems. We therefore collected documents from the Web as training data for topic estimation. Because the data contained not a few noises, we used Latent Semantic Mapping (LSM), which enables robust topic estimation by removing the effect of noise from the data. The experimental results based on using 272 utterances collected with a Woz-like method showed that our method increased the topic estimation accuracy by 23.1 points from the baseline.

Original languageEnglish
Title of host publicationInternational Speech Communication Association - 8th Annual Conference of the International Speech Communication Association, Interspeech 2007
Pages2057-2060
Number of pages4
Volume3
Publication statusPublished - 2007
Externally publishedYes
Event8th Annual Conference of the International Speech Communication Association, Interspeech 2007 - Antwerp
Duration: 2007 Aug 272007 Aug 31

Other

Other8th Annual Conference of the International Speech Communication Association, Interspeech 2007
CityAntwerp
Period07/8/2707/8/31

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Keywords

  • Multi-domain spoken dialogue system
  • Out-of-grammar utterance
  • Topic estimation

ASJC Scopus subject areas

  • Computer Science Applications
  • Software
  • Modelling and Simulation
  • Linguistics and Language
  • Communication

Cite this

Ikeda, S., Komatani, K., Ogata, T., & Okuno, H. G. (2007). Topic estimation with domain extensibility for guiding user's out-of-grammar utterances in multi-domain spoken dialogue systems. In International Speech Communication Association - 8th Annual Conference of the International Speech Communication Association, Interspeech 2007 (Vol. 3, pp. 2057-2060)