Abstract
This paper addresses the QoS adaptation problem in MPEG-4 multimedia applications. This adaptation involves solving a NP-hard optimisation problem, for which an optimal solution is not feasible in real-time. In the paper, we will formulate the problem and present an approximation algorithm called FAQoS to solve the problem in polynomial time by using a number of heuristics. We will show that FAQoS is as fast as the fastest known algorithm in literature (AMRMD [8]) and has a much higher accuracy than AMRMD, especially when the relative importance of objects is considered. Experiments show that solutions found by FAQoS are most of the time as close as 97% of the optimal solution. FAQoS is therefore suitable for use in real-time QoS adaptation in MPEG-4 applications, especially when the number of objects and the number of quality levels for each object are large.
Geert Deconinck is a postdoctoral fellow of the Fund for Scientific Research-Flanders, Belgium.
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Pham Ngoc, N., Lafruit, G., Deconinck, G., Lauwereins, R. (2002). A Fast QoS Adaptation Algorithm for MPEG-4 Multimedia Applications. In: Boavida, F., Monteiro, E., Orvalho, J. (eds) Protocols and Systems for Interactive Distributed Multimedia. IDMS 2002. Lecture Notes in Computer Science, vol 2515. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36166-9_9
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DOI: https://doi.org/10.1007/3-540-36166-9_9
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