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Beyond shot retrieval: searching for broadcast news items using language models of concepts

Aly, Robin and Doherty, Aiden R. and Hiemstra, Djoerd and Smeaton, Alan F. (2010) Beyond shot retrieval: searching for broadcast news items using language models of concepts. In: ECIR 2010 - 32nd European Conference on Information Retrieval, 28-31 March 2010, Milton Keynes, UK. (In Press)

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Abstract

Current video search systems commonly return video shots as results. We believe that users may better relate to longer, semantic video units and propose a retrieval framework for news story items, which consist of multiple shots. The framework is divided into two parts: (1) A concept based language model which ranks news items with known occurrences of semantic concepts by the probability that an important concept is produced from the concept distribution of the news item and (2) a probabilistic model of the uncertain presence, or risk, of these concepts. In this paper we use a method to evaluate the performance of story retrieval, based on the TRECVID shot-based retrieval groundtruth. Our experiments on the TRECVID 2005 collection show a significant performance improvement against four standard methods.

Item Type:Conference or Workshop Item (Paper)
Event Type:Conference
Refereed:Yes
Uncontrolled Keywords:semantic concept detector;
Subjects:Computer Science > Information storage and retrieval systems
Computer Science > Multimedia systems
Computer Science > Information retrieval
Computer Science > Digital video
Computer Science > Image processing
DCU Faculties and Centres:Research Initiatives and Centres > Centre for Digital Video Processing (CDVP)
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
DCU Faculties and Schools > Faculty of Engineering and Computing > School of Computing
Published in:ECIR 2010 - 32nd European Conference on Information Retrieval. Lecture Notes in Computer Science . Springer.
Publisher:Springer
Funders:Science Foundation Ireland
ID Code:15037
Deposited On:06 Apr 2010 14:21 by Aiden Doherty. Last Modified 06 Apr 2010 14:22

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