Abstract
In this paper, we summarise the previous work in the area of modelling variable bit rate (VBR) coded video sources in asynchronous transfer mode (ATM) networks. We verify these models, especially in the area of measuring the quality of their predictions for network performance and the grade of service experienced by a user. In addition to verifying these models, we suggest a new modelling approach of VBR coded video sources. In previous cases, the number of cells generated by the coder for a sequence of video frames are modelled. In the new modelling approach, the number of cells in each type of macroblocks of a frame are modelled. This model is tested by comparing the cell loss rate in simulation of an ATM switch to cell loss rate produced when traces generated by the model were used as source.
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