Context-awareness corresponds to a feature computing systems have when they can adapt their overall behavior to a set of information, called the context of use. In spite of their heterogeneity, the continuous evolution of mobile devices (MD) towards multipurpose, multi-sensors, and Web-enabled devices, transforms them into an ideal environment for context-aware applications. More and more, MDs are becoming the main tool for creating personal multimedia documents (PMD). In this new scenario, high-level context information can also play an important role. In fact, information related to the context in which the document was captured or created can offer information rich enough to describe, and, thereafter, identify such documents.
This work addresses the intersection of two research domains: Context-aware Computing and Multimedia Management. Context-awareness in the management of PMD is a new research approach, where the proposition of semantic models for representing contextual information and of mechanisms for acquiring and exploiting this high-level information are still unsolved problems. We propose a new context-aware architecture for the management of PMD called CoMMediA (Context-aware Mobile Multimedia Architecture), which is inspired by frameworks oriented to the adaptation of Mobile Information Systems.
Our contributions consists of: I) a semantic model for representing multimedia metadata (Context Multimedia), described in OWL and following a new notion of context, II) an adaptive middleware for context acquisition and multimedia creation (called DevAC), which takes into account the heterogeneity and the intrinsic limitations of MDs during the deployment of mobile applications, and III) a platform that enriches contextual metadata (ContextAnnotator). Our objective is to promote the automatic production of metadata, and also to propose mechanisms for integrating this high-level and semantic metadata in the processes of organization, annotation, sharing, and keyword-based retrieval of DMP. Moreover, DevAC and our mobile applications of DMP management are based on a component middleware and a semantic description of services. The ultimate goal is to assist developers in the development and deployment of multimedia and context-aware applications which can be adapted according to the models of users’ MDs, without the need to rewrite their code.
Link: http://www.lia.ufc.br/~windson/arquivos/these/theseWindsonViana2010.pdf
KEYWORDS : Multimedia Management, Context-Awareness, Annotation, Semantic Web, Adaptive
Deployment.
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