Abstract
The time relationships which characterize intermedia synchronization in a multimedia stream affect network performance. In this paper an analytical framework is presented in order to model the multimedia traffic and to evaluate the performance of a multiplexer loaded by multimedia sources. The emission process of each multimedia source is defined as the superposition of heterogeneous correlated emission processes, each of which models one monomedia source as a switched batch Bernoulli process (SBBP). In order to characterize the intermedia relationships a new parameter, here referred to as the Intermedia Synchronization Index (ISI), is defined in terms of the cross-covariance between the monomedia streams in the multimedia flow, and it is calculated in terms of the parameters of the emission process modeling the multimedia source. The influence of the ISI on loss performance is shown by means of examples in a case study.
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