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Future-generation multimedia applications are expected to be highly scalable to a wide variety of heterogeneous devices and highly available across wide-area distributed environments. This demands multiple stages of run-time support in QoS-aware middleware architectures, particularly, probing the performance of QoS parameters, instantiating the initial component configurations, and adapting to on-the-fly variations. This paper review past experiences and lessons learned in the existing architectures with respect to run-time support, and present a novel approach to unify these stages into integrated run-time middleware architecture, so that multimedia applications are monitored and configured in a coherent fashion.
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