Prof. Gerhard Fohler
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A Control Theory Approach to Video Stream Adaptation for Restricted Bandwidth Networks

Category: Inproceedings
Author(s)Rodrigo Coelho, Anand Kotra, Gerhard Fohler
SourceProceedings of 1st Workshop on Adaptive Resource Management (WARM10), Stockholm, Sweden.
Date Apr 2010


In this paper we present a lean method for real-time adap- tation of video streaming to limited and varying network bandwidth. It does not perform or modify an actual stream adaptation algorithm, rather uses a closed control loop to monitor resources and determine the operation of the adap- tation algorithm. Our method prevents oscillation between over- and underutilization of resources, which can bring the system to an unstable state, with low effective resource us- age. Further, its low computation requirements qualifies the application of this solution for adaptation of live streams. As a case study, we use the adaptation of a live MPEG-2 trans- port stream for transmission over network with constrained bandwidth. The method can further be applied for other constrained resources as well. Results from our experiments demonstrate the increase of effective resource usage.


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