Hierarchical approach to video source modelling

The authors consider models of compressed video sources with different scene types changing suddenly and producing a multiple activity output bit rate. The long-term autocorrelation effects are topics of interest in variable bit rate traffic. Moreover, video sources show different short-term and long-term (sample) autocorrelation behaviour. New classes of models are described which can explain the short-term and long-term autocorrelation effects. A hierarchical description of a traffic process is used to capture both effects. A class of 2-layer video codec models is also presented