A Model of Discourse Segmentation and Segment Title Assignment for Lecture Speech Indexing

Kazuhiro TAKEUCHI  Yukie NAKAO  Hitoshi ISAHARA  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E90-D   No.10   pp.1601-1610
Publication Date: 2007/10/01
Online ISSN: 1745-1361
DOI: 10.1093/ietisy/e90-d.10.1601
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Knowledge, Information and Creativity Support System)
Category: 
Keyword: 
discourse analysis,  speech summarization,  discourse markers,  

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Summary: 
Dividing a lecture speech into segments and providing those segments as learning objects are quite general and convenient way to construct e-learning resources. However it is difficult to assign an appropriate title to each object that reflects its content. Since there are various aspects of analyzing discourse segments, it is inevitable that researchers will face the diversity when describing the "meanings" of discourse segments. In this paper, we propose the assignment of discourse segment titles from the representation of their "meanings." In this assigning procedure, we focus on the speaker's evaluation for the event or the speech object. To verify the effectiveness of our idea, we examined identification of the segment boundaries from the titles that were described in our procedure. We confirmed that the result of the identification was more accurate than that of intuitive identification.