Modeling One- and Two-Layer Variable Bit Rate Video

This paper presents a source model for variable bit rate (VBR) video traffic. A finite state Markov chain is shown to adequately model the short term correlations that are essential for studying network performance. The modeling technique is shown to be applicable for both H.261 and MPEG2 encoded video. The traffic model is used in a simulation study to determine statistical multiplexing gains of VBR video relative to constant bit rate (CBR) transport. The relative efficiency of transporting one and two layer video are compared.