Cost-level integration of statistical and rule-based dialog managers

Shinji Watanabe*, John R. Hershey, Tim K. Marks, Youichi Fujii, Yusuke Koji

*この研究の対応する著者

研究成果: Conference article査読

4 被引用数 (Scopus)

抄録

Statistical dialog managers can potentially make more robust decisions than their rule-based counterparts, because they can account for uncertainties due to errors in speech recognition and natural language understanding. In practice, however, statistical dialog managers can be difficult to use, as they may require a large number of parameters to be inferred from limited data. Consequently, hand-crafted rule based systems are still effective for practical use. This paper proposes a method to integrate an existing rule-based dialog manager with a statistical dialog manager based on Bayes decision theory, by incorporating the rule-based dialog manager into the cost function of the statistical dialog manager. The cost function has two parts: An efficiency cost that penalizes inefficient actions, as in conventional statistical dialog approaches, and a regularization cost that slightly penalizes system actions that differ from those that would be chosen by the rule-based system. Our experiments, which use a destination-setting task in an automobile dialog scenario, demonstrate that the integrated system produces system actions that are similar to those of an existing rule-based dialog manager but enable task completion using fewer turns than the rule-based system.

本文言語English
ページ(範囲)323-327
ページ数5
ジャーナルProceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH
出版ステータスPublished - 2014
外部発表はい
イベント15th Annual Conference of the International Speech Communication Association: Celebrating the Diversity of Spoken Languages, INTERSPEECH 2014 - Singapore, Singapore
継続期間: 2014 9月 142014 9月 18

ASJC Scopus subject areas

  • 言語および言語学
  • 人間とコンピュータの相互作用
  • 信号処理
  • ソフトウェア
  • モデリングとシミュレーション

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