| 一种考虑场景的基于RTP的MPEG-2视频源业务模型 |
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| 引用本文： | 陶蒙华,沈树群,黄孝建,何海波.一种考虑场景的基于RTP的MPEG-2视频源业务模型[J].信号处理,2002,18(2):180-182. |
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| 作者姓名： | 陶蒙华 沈树群 黄孝建 何海波 |
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| 作者单位： | 北京邮电大学电子工程学院 |
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| 摘 要： | 针对实时多媒体在ＩＰ网络上的传输，提出了一种基于实时传输协议的ＭＰＥＧ ＶＢＲ视频源的建模，此模型考虑了场景的变化和同一场景内码流的波动。用几何分布来描述场景的变化，用ＡＲ（２）模型来反映同一场景内码流的波动。对互帧采用合成模型建模，对Ｐ，Ｂ帧采用伽玛函数建模。通过对它们的排队性能的分析，证明了这种合成模型能够很好地反映实际视频流的特征。
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| 关 键 词： | 实时传输协议 AR(2) MPEG-2 场景分布 |
| 修稿时间： | 2001年10月9日 |
A RTP-based MPEG-2 Video Sources Traffic Model With Scene Distribution |
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| Tao Menghua,Huang Xiaojian,He Haibo,Shen Shuqun.A RTP-based MPEG-2 Video Sources Traffic Model With Scene Distribution[J].Signal Processing,2002,18(2):180-182. |
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| Authors: | Tao Menghua Huang Xiaojian He Haibo Shen Shuqun |
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| Abstract: | Considering the transportation of real-time multimedia on IP networks, a model of RTP-based\lPEG VBR video sources is provided to capture the frame size at multiple time scales: the change of scene and fluctuation of bit-rate. Geometric distribution is used to depict the change of scene while the fluctuation is described by the AR(2) process in the same scene.A resultant model is used to model the I frames while the P,B frames are modeled with Gamma density function. The analysis of queue performance proves that the model is good enough to model the MPEG video sources traffic. |
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| Keywords: | Real-time transport protocol AR(2) MPEG-2 Scene distribution |
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