Geodesic
Offensive and Defensive Adaptation in Distributed Multimedia Systems
Computer Science and Information Systems, Tome 1 (2004) no. 1.

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Adaptation in multimedia systems is usually restricted to defensive, reactive media adaptation (often called stream-level adaptation). We argue that offensive, proactive, system-level adaptation deserves not less attention. If a distributed multimedia system cares for overall, end-to-end quality of service then it should provide a meaningful combination of both.We introduce an adaptive multimedia server (ADMS) and a supporting middleware which implement offensive adaptation based on a lean, flexible architecture. The measured costs and benefits of the offensive adaptation process are presented.We introduce an intelligent video proxy (QBIX), which implements defensive adaptation. The cost/benefit measurements of QBIX are presented elsewhere [1].We show the benefits of the integration of QBIX in ADMS. Offensive adaptation is used to find an optimal, user-friendly configuration dynamically for ADMS, and defensive adaptation is added to take usage environment (network and terminal) constraints into account.
Keywords: stream-level adaptation, server-level adaptation, MPEG-4, MPEG-7, MPEG-21 
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     author = {Roland Tusch and L\'aszl\'o B\"osz\"orm\'enyi and Bal\'azs Goldschmidt and Hermann Hellwagner and Peter Schojer},
     title = {Offensive and {Defensive} {Adaptation} in {Distributed} {Multimedia} {Systems}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {2004},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2004_1_1_a3/}
}
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Roland Tusch; László Böszörményi; Balázs Goldschmidt; Hermann Hellwagner; Peter Schojer. Offensive and Defensive Adaptation in Distributed Multimedia Systems. Computer Science and Information Systems, Tome 1 (2004) no. 1. http://geodesic.mathdoc.fr/item/CSIS_2004_1_1_a3/