The use of phrases and structured queries in information retrieval
SIGIR '91 Proceedings of the 14th annual international ACM SIGIR conference on Research and development in information retrieval
On-line new event detection and tracking
Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval
Complementary video and audio analysis for broadcast news archives
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SIGIR '00 Proceedings of the 23rd annual international ACM SIGIR conference on Research and development in information retrieval
Collages as dynamic summaries for news video
Proceedings of the tenth ACM international conference on Multimedia
Structured use of external knowledge for event-based open domain question answering
Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval
VideoQA: question answering on news video
MULTIMEDIA '03 Proceedings of the eleventh ACM international conference on Multimedia
Learning query-class dependent weights in automatic video retrieval
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News video search with fuzzy event clustering using high-level features
MULTIMEDIA '06 Proceedings of the 14th annual ACM international conference on Multimedia
Video retrieval using high level features: exploiting query matching and confidence-based weighting
CIVR'06 Proceedings of the 5th international conference on Image and Video Retrieval
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Proceedings of the 17th international conference on World Wide Web
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AMT '09 Proceedings of the 5th International Conference on Active Media Technology
Trajectory-based visualization of web video topics
Proceedings of the international conference on Multimedia
Social tags as news event detectors
Journal of Information Science
Beyond search: Event-driven summarization for web videos
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
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MM '11 Proceedings of the 19th ACM international conference on Multimedia
Why did the prime minister resign?: generation of event explanations from large news repositories
MM '11 Proceedings of the 19th ACM international conference on Multimedia
MMM'10 Proceedings of the 16th international conference on Advances in Multimedia Modeling
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Earlier research in news video has been focusing mainly on improving retrieval accuracies given the limited amount of extractable video semantics. In this paper, we propose an enhancement to news video searching by leveraging extractable video semantics coupled with relevant external information resources to support event-based analysis; leading to discovery of topic hierarchy for browsing key events and supporting question answering (QA). We introduce topic browsing based on news structures obtained through hierarchical clustering and threading, with emphasis on interesting events determined by measuring the amount of "web activities" on these events on Blog sites. For QA, we employ extensive query analysis to obtain various query features in addition to the topic hierarchical structures to answer both context-oriented and visual-oriented questions. Our main contributions includes: (a) combining multimodal event information extracted from news video, web news articles and news blogs to support event analysis, (b) introducing topic evolution browsing based on users' interest and (c) extending QA on top of topic hierarchy to handle various types of specialized video queries. Experiments performed on 70 hours of multilingual news from TRECVID 2005 dataset shows that the proposed approach is effective and appealing to users.