IRISA at MediaEval 2015: Search and Anchoring in Video Archives Task

Anca-Roxana Simon 1 Guillaume Gravier 1 Pascale Sébillot 1
1 LinkMedia - Creating and exploiting explicit links between multimedia fragments
Inria Rennes – Bretagne Atlantique , IRISA-D6 - MEDIA ET INTERACTIONS
Abstract : This paper presents our approach and results in the Search and Anchoring in Video Archives task at MediaEval, 2015. The Search part aims at returning a ranked list of video segments that are relevant to a textual user query. The Anchoring part focuses on identifying video segments that would encourage further exploration within the archive. A two step approach is implemented for both sub-tasks. The first step is common to both. This step consists in generating a list of potential anchor segments and response-query segments relying on a hierarchical topical structuring technique; In the second step, for each query, the best 20 segments are selected according to content based comparisons, while for the anchor detection sub-task, the segments are ranked based on a cohesion measure. The use of the hierarchical topical structure helps to propose segments of variable length at different levels of details with precise jump-in points for them. More, the algorithm deriving the structure relies on the burstiness phenomenon in word occurrences which gives an advantage over the classical bag-of-words model.
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Anca-Roxana Simon, Guillaume Gravier, Pascale Sébillot. IRISA at MediaEval 2015: Search and Anchoring in Video Archives Task. Working Notes Proceedings of the MediaEval Workshop, 2015, Wurzen, Germany. ⟨hal-01196176⟩

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