| MPEG-4视频流量多重分形建模 |
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| 引用本文： | 王升辉,裘正定.MPEG-4视频流量多重分形建模[J].通信学报,2006,27(10):44-50. |
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| 作者姓名： | 王升辉 裘正定 |
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| 作者单位： | 北京交通大学,信息所,北京,100044 |
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| 摘 要： | 从多重分形树的定义出发，分析了多重分形各尺度系数的边缘分布特性及系数间自相关函数的关系，并利用得到的结论提出了一种新的MPEG-4视频流量多重分形模型（PMFM，predictable MFM）。通过对最粗尺度系数进行auto-regressive短相关预测建模，该模型具有了传统多重分形模型不具备的流量预测能力；另外，模型改进了各尺度乘子的参数获取方式，使得多重分形模型的稳定性有了显著提高。
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| 关 键 词： | 视频流量建模 多重分形 |
| 文章编号： | 1000-436X（2006）10-0044-07 |
| 收稿时间： | 2006-01-23 |
| 修稿时间： | 2006-01-232006-06-19 |
Multifractal modeling of MPEG-4 video traffic |
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| WANG Sheng-hui,QIU Zheng-ding.Multifractal modeling of MPEG-4 video traffic[J].Journal on Communications,2006,27(10):44-50. |
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| Authors: | WANG Sheng-hui QIU Zheng-ding |
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| Affiliation: | Institute of Information Science, Beijing Jiaotong University, Beijing 100044,China |
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| Abstract: | The correlation function and marginal distribution of multipliers at each layer were investigated in multifractal multiplicative process.Based on the lemmas gained,a new multifractal MPEG-4 video traffic model(PMFM,predict-able MFM)was proposed.By modeling the coarsest coefficients with the auto-regressive(AR) process,PMFM has the ability of traffic prediction that traditional MFM do not have.Furthermore,the model stability and robustness were also improved by changing the way of parameter estimation. |
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| Keywords: | MPEG-4 QoS |
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