一种高效率的零延迟VBR编码视频流调度算法  

A high efficient scheduling algorithm for VBR-encoded video stream with zero delay

作　　者：王勇[1] 张应刚[1] 袁巢燕[1] 

机构地区：[1]重庆理工大学计算机科学与工程学院,重庆400054

出　　处：《计算机工程与科学》2013年第8期130-134,共5页Computer Engineering & Science

基　　金：重庆市教委基金资助项目(KJ100821)

摘　　要：如何有效使用网络带宽是网络视频点播系统的关键问题之一。可变码率编码VBR视频由于能提高视频压缩率而被广泛应用。支持用户零等待延迟的实时服务,且能减少服务器带宽消耗是点播服务算法的目标。分析了多种现有视频流调度方法的优劣,提出了ZDB-VBR算法来解决用户等待延迟问题,并最大限度地降低了服务器带宽消耗,提高了整个系统的效率。仿真实验表明了该方法在用户延迟、带宽消耗等方面的优越性。In the network video services, one of the key techniques is to use storage and network re sources efficiently. The objective of algorithms is to support the real-time service of uses＇ zero waiting delay, and reduce the consumption of server＇s bandwidth. Several zero-delay stream scheduling algo- rithms are introduced, and the advantages and disadvantages of each scheduling methods are analyzed. ZDB-VBR algorithm is proposed to solve the users＇ waiting delay and reduce the consumption of server＇ s bandwidth maximally. It can improve the efficiency of the system. Simulation results prove the superi- ority of this method in dealing with user delay and bandwidth consuming

关 键 词：视频点播 流调度 可变码率 

分 类 号：TP317.5[自动化与计算机技术—计算机软件与理论]