Roland Tusch , Institute of Information
Technology Klagenfurt University,
Klagenfurt, Austria
László Böszörményi, Institute of Information
Technology Klagenfurt University,
Klagenfurt, Austria
Balázs Goldschmidt, Department of Control
Engineering and Information Technology , Budapest
University of Technology and Economics, Budapest,
Hungary
Hermann Hellwagner, Institute
of Information Technology Klagenfurt University,
Klagenfurt, Austria
Peter Schojer, Institute of Information
Technology Klagenfurt University, Klagenfurt, Austria
Abstract. 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.
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.
Volume 01 , Issue 01 (February
2004) table of contents
Year of Publication: 2004
ISSN:1820-0214
Publisher ComSIS Consortium |
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