Paper: Prosody-Based Topic Segmentation For Mandarin Broadcast News

ACL ID N04-4035
Title Prosody-Based Topic Segmentation For Mandarin Broadcast News
Venue Human Language Technologies
Session Short Paper
Year 2004
Authors

Automatic topic segmentation, separation of a discourse stream into its constituent sto- ries or topics, is a necessary preprocessing step for applications such as information re- trieval, anaphora resolution, and summariza- tion. While significant progress has been made in this area for text sources and for English au- dio sources, little work has been done in au- tomatic, acoustic feature-based segmentation of other languages. In this paper, we focus on prosody-based topic segmentation of Man- darin Chinese. As a tone language, Man- darin presents special challenges for applica- bility of intonation-based techniques, since the pitch contour is also used to establish lexical identity. We demonstrate that intonational cues such as reduction in pitch and intensity at topic boundaries and in...