一种新的ATM网VBR视频业务模型  

A New VBR Video Traffic Model on ATM Networks

作　　者：徐树公[1] 黄载禄[1] 

机构地区：[1]华中理工大学电子与信息工程系

出　　处：《电子学报》1997年第1期102-105,共4页Acta Electronica Sinica

摘　　要：许多研究工作表明ＶＢＲ视频业务的每帧信元数服从Ｇａｍｍａ分布，但是考虑这一性质的视频业务模型却很少．本文提出一种新的视频业务模型，一阶自回归Ｇａｍｍａ序列，它的取值是Ｇａｍｍａ分布的随机变量，文中给出ＧＡＲ模型的定义及有关性质．对ＧＡＲ（１）视频模型的参数估计方法也作了研究．仿真实验结果说明本文提出的ＧＡＲ（１）模型比以前的模型更能反映视频业务的特点，利用此模型产生仿真数据相当简便准确．Several works have concluded that the number of cells per frame of VBR video follows a gamma distribution. But few model meets this character. In this paper we propose a novel video model, a first-order autoregressive (AR) gamma sequence, in which random variables are marginally distributed as gamma variables. We give the definition of GAR model and show some characters of GAR(1). The parameter estimation method is studied too. Simulation results show that our model can reflect the characters of VBR video better than the former models. It is more easy and accurate to create simulation data sequences using this new model.

关 键 词：ATM网 VBR视频业务 模型 电视 

分 类 号：TN941.1[电子电信—信号与信息处理]