A gamma autoregressive video model on ATM networks

Authors:
Shugong Xu;Zailu Huang
Affiliations:
Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., Wuhan;-
Venue:
IEEE Transactions on Circuits and Systems for Video Technology
Year:
1998

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Abstract

Several works have concluded that the number of cells per frame of variable bit-rate (VBR) video teleconference follows a gamma distribution. But few video models meet this characteristics. We propose a novel video model, called first-order autoregressive (AR) gamma sequence, in which random variables are marginally distributed as gamma variables. We give the definition of a GAR model and a simple realization method of GAR(1). Parameter estimation methods are studied, too. Simulation results show that our model can meet the characteristics of VBR video better than existing models