ATM网络中VBR编码视频流量的源模型

Proceedings 23rd Annual Conference on Local Computer Networks. LCN'98 (Cat. No.98TB100260) Pub Date : 1998-10-11 DOI:10.1109/LCN.1998.727661

G. Sisodia, M. Hedley, S. De, L. Guan

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引用次数: 5

摘要

提出了一种在异步传输模式(ATM)网络中对可变比特率(VBR)编码视频源建模的新方法。与现有方法对视频帧序列的编码器生成的细胞数进行建模不同，该方法考虑了编码器生成的不同细胞的特征，并分别对一帧的每种宏块中的细胞数进行建模，从而提高了建模精度。通过比较自相关函数和通过ATM交换机模拟的缓冲区中的平均队列大小与使用模型生成的迹线作为源时产生的平均队列大小，对模型进行了测试。在测量其对网络性能和用户体验的服务等级的预测质量方面，与现有模型进行比较。

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Source model for VBR coded video traffic in ATM networks

We present a new approach to modelling variable bit rate (VBR) coded video sources in asynchronous transfer mode (ATM) networks. Unlike the existing methods which model the number of cells generated by the coder for a sequence of video frames, the new approach improves the modelling accuracy by considering the characteristics of different cells generated by the coder, and modelling the number of cells in each type of macroblocks of a frame separately. The model is tested by comparing the autocorrelation function and mean queue size in the buffer by simulation of an ATM switch to the mean queue size produced when traces generated by the model are used as the source. Comparisons with the existing models are performed in the area of measuring the quality of their predictions for the network performance and the grade of service experienced by a user.

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Proceedings 23rd Annual Conference on Local Computer Networks. LCN'98 (Cat. No.98TB100260)

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