自相似VBR视频源业务流的建模和仿真
THE MODELING AND SIMULATION OF SELF-SIMILAR VBR VIDEO TRAFFIC
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摘要: 该文在对实际VBR MPEG视频源统计特性分析的基础上,参照分形高斯噪声自相似(Fractional Gaussian Noise Self-Similar)模型产生方法,实现了对ATM网络中最主要业务流VBR视频源流的建模,提出了改进方法,使得对实际源的仿真不仅考虑到了长期相关性,同时也兼顾到了短期相关性。仿真结果表明,经改进的自相似VBR视频源模型是一种较理想的模型。
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关键词:
- 视频源建模; 长期相关性; 自相似模型
Abstract: A statistical characteristics model of empirical VBR MPEG-I video streams is presented in this paper. Based on fractional Gaussian noise process, an self-similar model approach which models directly both the short-range dependence and long-range dependence empirical autocorrelation structure is studied. According to the simulation result, the improved self-similar process is a better model of VBR video traffic. -
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