A new modeling approach of H.263+VBR coded video sources in ATM networks

In this paper, we present a new approach to modeling variable bit rate (VBR ) coded video sources in asynchronous transfer mode (ATM) networks. Unlike the existing methods which model the number of cells generated by the coder for a sequence of video frames, the new approach improves modeling accurac y by considering the characteristics of different cells generated by the co der, and modeling the number of cells in each type of macroblock of a frame separately. The model is tested by comparing the cell loss rate and mean q ueue size in simulation of an ATM switch, with the same statistics produced when traces generated by the model are used as the source, Comparisons wit h the existing models are made by measuring both the quality of their predi ctions for network performance and the quality of service experienced by a user, (C) 2000 Academic Press.