Chapter

Advances in Multilingual and Multimodal Information Retrieval

Volume 5152 of the series Lecture Notes in Computer Science pp 703-711

Dublin City University at CLEF 2007: Cross-Language Speech Retrieval Experiments

  • Ying ZhangAffiliated withCentre for Digital Video Processing & School of Computing, Dublin City University
  • , Gareth J. F. JonesAffiliated withCentre for Digital Video Processing & School of Computing, Dublin City University
  • , Ke ZhangAffiliated withCentre for Digital Video Processing & School of Computing, Dublin City University

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Abstract

The Dublin City University participation in the CLEF 2007 CL-SR English task concentrated primarily on issues of topic translation. Our retrieval system used the BM25F model and pseudo relevance feedback. Topics were translated into English using the Yahoo! BabelFish free online service combined with domain-specific translation lexicons gathered automatically from Wikipedia. We explored alternative topic translation methods using these resources. Our results indicate that extending machine translation tools using automatically generated domain-specific translation lexicons can provide improved CLIR effectiveness for this task.