5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

Extraction of the Dialog Act and the Topic From Utterances in a Spoken Dialog System

Yasuhisa Niimi, Noboru Takinaga, Takuya Nishimoto

Kyoto Institute of Technology, Japan

ABSTRACT 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 top-down analyses. Bottom-up candidates are decided by applying a set of specially designed rules to the semantic representation of an utterance, and top-down candidates by using the current state of the dialog history. The logical ANDs between bottom-up and top-down candidates are taken to decide the dialog act and topic of an utterance. This method was examined with a corpus of fourteen dialogs including 335 utterances. Correct extraction rates were 85% for the topic and 82% for the dialog act.

Full Paper

Bibliographic reference.  Niimi, Yasuhisa / Takinaga, Noboru / Nishimoto, Takuya (1998): "Extraction of the dialog act and the topic from utterances in a spoken dialog system", In ICSLP-1998, paper 1138.