1st International ICST Conference on Multimedia Services Access Networks

Research Article

Transport mechanisms for metadata-driven distributed multimedia adaptation

  • @INPROCEEDINGS{10.1109/MSAN.2005.1489936,
        author={Michael  Ransburg and Christian  Timmerer and Hermann  Hellwagner},
        title={Transport mechanisms for metadata-driven distributed multimedia adaptation},
        proceedings={1st International ICST Conference on Multimedia Services Access Networks},
        keywords={MPEG-21 Digital Item Adaptation; distributed multimedia adaptation; metadata transport},
  • Michael Ransburg
    Christian Timmerer
    Hermann Hellwagner
    Year: 2005
    Transport mechanisms for metadata-driven distributed multimedia adaptation
    DOI: 10.1109/MSAN.2005.1489936
Michael Ransburg1,2,*, Christian Timmerer1,2,*, Hermann Hellwagner1,2,*
  • 1: Department of Information Technology (ITEC)
  • 2: Klagenfurt University, Klagenfurt, Austria
*Contact email: michael.ransburg@itec.uni-klu.ac.at, christian.timmerer@itec.uni-klu.ac.at, hermann.hellwagner@itec.uni-klu.ac.at


The information revolution of the last decade has resulted in a phenomenal increase in the quantity of multimedia content available to an increasing number of different users with different preferences who access it through a plethora of devices and over heterogeneous networks. In order to address the amount of different content types, MPEG-21 Digital Item Adaptation (DIA) introduces interoperable description tools which enable coding format independent adaptation. Bandwidthefficient transport of the content to terminals with different capabilities and through a variety of access networks with various characteristics requires adaptation facilities not only on the server but also within the network. In this paper we present transport mechanisms for MPEG-21-based metadata enabling generic adaptation within the network. Three different transport mechanisms for delivering this metadata in conjunction with the corresponding multimedia content are evaluated and a payload format for the transport of this metadata is presented. Furthermore, we performed measurements which demonstrate the bandwidth benefits of our distributed adaptation approach compared to server-centric adaptation in a multicast scenario. Finally, we applied various encoding formats for the metadata which further reduces the metadata overhead.