Format-independent and metadata-driven media resource adaptation using semantic web technologies |
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Authors: | Davy Van Deursen Wim Van Lancker Sarah De Bruyne Wesley De Neve Erik Mannens Rik Van de Walle |
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Affiliation: | (1) Multimedia Lab, Department of Electronics and Information Systems, Ghent University-IBBT, Belgium Gaston Crommenlaan 8, Bus 201, 9050 Ledeberg-Ghent, Belgium |
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Abstract: | Adaptation of media resources is an emerging field due to the growing amount of multimedia content on the one hand and an
increasing diversity in usage environments on the other hand. Furthermore, to deal with a plethora of coding and metadata
formats, format-independent adaptation systems are important. In this paper, we present a new format-independent adaptation
system. The proposed adaptation system relies on a model that takes into account the structural metadata, semantic metadata,
and scalability information of media bitstreams. The model is implemented using the web ontology language. Existing coding
formats are mapped to the structural part of the model, while existing metadata standards can be linked to the semantic part
of the model. Our new adaptation technique, which is called RDF-driven content adaptation, is based on executing SPARQL Protocol
and RDF Query Language queries over instances of the model for media bitstreams. Using different criteria, RDF-driven content
adaptation is compared to other adaptation techniques. Next to real-time execution times, RDF-driven content adaptation provides
a high abstraction level for the definition of adaptations and allows a seamless integration with existing semantic metadata
standards. |
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