Analysis of cell inter-arrival from VBR video codecs

Most work in video traffic modelling has concentrated on the frame level and little work has been done to model the cell level traffic. The authors give the cell inter-arrival statistics for several sequences and used them in a multiplexer simulation to obtain cell loss results. Many models have assumed that the cell level traffic is Poisson. They show that the cell inter-arrival is not i.i.d., but is correlated. This is due to the fact that in image coding the compression scheme is only applied locally. Thus, some correlation still remains in the cell stream produced. The cell loss obtained were larger than those from the uniform cell spacing and Poisson assumptions, and the cell burst loss length distribution was found to be approximated by a geometric distribution