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IntroductionRate control is essential to video transmissionthrough heterogeneous lossy networks and time-varying communication channels.In recent years,scalability has gained more attention as a highlydesirable feature of some video coders,such asMPEG-4and Motion JPEG2000.Scalability canprovide not only precise rate control for constantbitrate(CBR)traffic,but also accurate qualitycontrol for variable bitrate(VBR)traffic,whenthe coder adopts different rate control algorithm.The rate contr… 相似文献
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