@InProceedings{Tusch2003b, author = {Tusch, Roland and Böszörmenyi, Laszlo and Goldschmidt, Balázs and Hellwagner, Hermann and Schojer, Peter}, booktitle = {Proceedings of ICETA 2003, 2nd International Conference on Emerging Telecommunications Technologies and Applications}, title = {Offensive and Defensive Adaptation in Distributed Multimedia Systems}, year = {2003}, address = {Košice, Slovak Republic}, editor = {Jakab, F and Cizmar, A}, month = sep, pages = {17-19}, publisher = {Elfa}, abstract = {Adaptation 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~\citeSchojer03. 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.}, isbn10 = {8089066674}, issn = {80-89066-06-2}, language = {EN}, talktype = {none} }