ATM计算机网络中变比特率码流视频数据通信码率控制算法研究

The Research of Variable Bits Rate Code Flows Control Algorithm of Video Data Communication in ATM Computer Network

首先给出了变比特速率视频业务的主要特点，对视频业务数据流特性进行了讨论，给出了变比特速率（ＶＢＲ）视频业务模型。根据基于码率分布函数的投影变换自回归（ＰＡＲ）业务模型，讨论了数字视频接入ＡＴＭ网络时码率的控制原则。最后针对前向码率控制（ＦＲＣ）策略，给出了ＡＴＭ网络在投影变换自回归（ＰＡＲ）业务模型下数字视频业务带宽监管性能的比较结果。

This paper, we first give out some features of variable bit rate (VBR) video services, to discussed the characteristic of video data flows, points out the video services model of (VBR). According to video services model of projection AR (PAR) which based on the cumulative probability function, talk over the principle of video bits rate control when digital video over ATM. At last, for the forward rate control (FRC), we show the bandwidth management compare results of digital video services based on PAR model in ATM network.