Metadata for Audio 25th International AES Conference 17th to 19th June 2004 London UK
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Metadata for Audio

Poster CD2-4

Phone-Based Spoken Document Retrieval in Conformance with the MPEG-7 Standard

Nicolas Moreau, Hyoung-Gook Kim, Thomas Sikora
Technical University of Berlin, Berlin, Germany

This paper presents a phone-based approach of spoken document retrieval, developed in the framework of the emerging MPEG-7 standard. The audio part of MPEG-7 encloses a SpokenContent tool that provides a standardized description of the content of spoken documents. In the context of MPEG-7, we propose an indexing and retrieval method that uses phonetic information only and a vector space IR model. Experiments are conducted on a database of German spoken documents with ten city name queries. Two phone-based retrieval approaches are presented and combined. The first one is based on the combination of phone Ngrams of different lengths used as indexing terms. The other consists of expanding the document representation thanks to the phone confusion probabilities.

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