Context-aware multimedia processing system in a pervasive environment

  • Authors:

  • Zhuzhong Qian;Song Guo;Minyi Guo;Sanglu Lu

  • Affiliations:

  • State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing, China and School of Computer Science and Engineering, The University of Aizu, Aizu-Wakamastu, Japan;School of Computer Science and Engineering, The University of Aizu, Aizu-Wakamastu, Japan;School of Computer Science and Engineering, The University of Aizu, Aizu-Wakamastu, Japan;State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing, China

  • Venue:
  • GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
  • Year:
  • 2009

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Abstract

Service-oriented multimedia processing system is an effective approach to allow dynamic and customized service requests in a pervasive environment. This paper studies the context-aware multimedia processing problem under the consideration of the QoS from two aspects: delay and media quality. The second metric is introduced based on the factor that different display devices can adapt to different media quality to the same request. We propose a new measurement, the media quality change ratio, to quantitively describe the adaptability of source media to meet quality requirement of different devices. We further investigate the important issue on how to find an optimal service path according to the users' requirements which are formulated as functional paths. Previous work on the path construction is only based on one fixed functional path. We propose a heuristic algorithm CMpath that explores multiple functional paths and thus can generate a service path to meet both low-delay and media quality requirements. Our experimental results also validate the proposed algorithm.