基于HFC网络的VBR视频流传输  

Transmission of VBR video stream on the HFC network

作　　者：傅锡天[1] 施可为[1] 孙景鳌[1] 蔡安妮[1] 

机构地区：[1]北京邮电大学,北京100876

出　　处：《通信学报》2001年第3期33-39,共7页Journal on Communications

基　　金：邮电部学科建设基金!资助项目 (BJ0 - 0 0 0 3- 2 )

摘　　要：本文讨论了基于HFC网络的变比特率 (VBR)视频流的传输问题 ,提出了一种在共享信道上的协作型传输方案 ;分别利用了中心极限定理和直方图卷积的方法 ;给出了两种接纳控制算法 ,通过仿真实验表明了这种方案比传统的无缓冲复用方案在带宽利用率上提高了约 2 5% ,同时验证了两种接纳控制算法。Transmission of VBR video stream on the HFC network is discussed in this paper A cooperative transmission scheme is presented which works on a shared link Two admission control algorithms are then put forward,which are based on central limit theorem and histogram convolution respectively Through simulation,it′s found that the scheme outperforms the bufferless multiplex schems about 25% in the bandwidth utilization The admission algorithms are also verified with the simulation

关 键 词：VBR 视频流 HFC网 传输 通信网 接入网 

分 类 号：TN915.62[电子电信—通信与信息系统]