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Is the author of an original work the owner of its intellectual
property rights? Can the exploitation rights be traded and handed
over different people, eventually transforming the original work?
If so, a media value chain can be defined where the different
parties exchange rights and content in a fair environment
acknowledging a common model. With this model, IT systems may
interoperate more easily and may grant that intellectual property
is respected. The Media Value Chain Ontology represents such a
model, and it has become part of the MPEG-21 standard, a Multimedia
Framework where any digital content can be protected, licensed and
consumed. This PhD Thesis was an important contribution for the
development of the standard, and those interested in their
inception will find this book very useful. On despite of being a
formal work, the text is enriched with multiple examples and
figures and it can be easily followed by readers interested either
in the MPEG-21 world, the architecture of rights-aware content
distribution systems, electronic contracts representation or
ontologies in general.
The starting point of this book is the work developed within the
Xarxa IP Audiovisual de Catalunya (XAe project in 2005-2006, in
which a group of content producers (mainly local televisions (TVs))
wanted to have the means of exchanging their multimedia contents.
From the obtained results, we could identify a number of important
issues that still needed to be addressed. Furthermore, our
contributions should be extensible to a generic distributed
multimedia scenario. Thus, our foremost requirement was to use open
standards. In line with the open issues previously identified, this
book presents five independent but related contributions. Our first
Contribution presents a proposed adaptation authorisation technique
based on MPEG-7 descriptors. Our second Contribution presents the
identification of a complete standardised set of context
descriptors, and an innovative approach for modelling them based on
profiles. Our third Contribution presents a novel adaptation
authorisation process based on the context profiles specified in
Contribution 2 which improves the efficiency of the adaptation
authorisation presented in Contribution 1.
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