The most attractive form of future network content will be multi-media including speech information, and such speech information usually carries the core concepts for the content. As a result, the spoken documents associated with the multi-media content very possibly can serve as the key for retrieval and browsing. This paper presents a new approach of hierarchical topic organization and visual presentation of spoken documents for such a purpose based on the Probabilistic Latent Semantic Analysis (PLSA). With this approach the spoken documents can be organized into a two-dimensional tree (or multi-layered map) of topic clusters, and the user can very efficiently retrieve or browse the network content or associated spoken documents. Different from the conventional document clustering approaches, with PLSA the relationships among the topic clusters and the appropriate terms as the topic labels can be very well derived. An initial prototype system with Chinese broadcast news as the example spoken documents including automatic generation of titles and summaries and retrieval/browsing functionalities is also presented. Choice of different units other than words to be used as the terms in the processing is also considered in the system based on the special structure of the Chinese language.
|出版狀態||已發佈 - 2005 十二月 1|
|事件||9th European Conference on Speech Communication and Technology - Lisbon, 葡萄牙|
持續時間: 2005 九月 4 → 2005 九月 8
|其他||9th European Conference on Speech Communication and Technology|
|期間||2005/09/04 → 2005/09/08|
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