Conference paper
Castsearch - Context Based Spoken Document Retrieval
The paper describes our work on the development of a system for retrieval of relevant stories from broadcast news. The system utilizes a combination of audio processing and text mining. The audio processing consists of a segmentation step that partitions the audio into speech and music. The speech is further segmented into speaker segments and then transcribed using an automatic speech recognition system, to yield text input for clustering using non-negative matrix factorization (NMF).
We find semantic topics that are used to evaluate the performance for topic detection. Based on these topics we show that a novel query expansion can be performed to return more intelligent search results. We also show that the query expansion helps overcome errors of the automatic transcription
Language: | English |
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Publisher: | IEEE |
Year: | 2007 |
Pages: | IV-93-IV-96 |
Proceedings: | 2007 IEEE International Conference on Acoustics, Speech and Signal Processing |
ISBN: | 1424407273 , 9781424407279 , 1424407281 and 9781424407286 |
ISSN: | 2379190x and 15206149 |
Types: | Conference paper |
DOI: | 10.1109/ICASSP.2007.367171 |
ORCIDs: | Mølgaard, Lasse Lohilahti and Hansen, Lars Kai |