中文摘要：

可伸缩视频编码能生成空域、时域、质量可伸缩的视频码流,如何对其进行码率控制来生成最优的可伸缩性码流,对适应不同需求的终端十分重要。结合可伸缩视频编码码率控制的研究现状,描述了最新的研究进展,综述了码流控制的原理、经典算法,分析总结了可伸缩视频编码的关键技术及在可伸缩视频编码中的挑战。通过对增强层中各种码率控制算法的优缺点的分析,总结出增强层的时域可扩展和空域可扩展中码率控制的最优解决方案。最后对可伸缩编码中码率控制技术的发展趋势进行了展望。

英文摘要：

Scalable video coding can generate spatial,temporal and quality scalable video streaming.Rate control plays an important role in how to generate the optimal scalable bit-streams to adapt to different terminals.Combined current situations for scalable video coding rate control,describe the latest research progress,review the principles and classical algorithms of rate control,and analyze and summarize the key technology for scalable video coding and the challenge of rate control in scalable video coding.Through the analysis of advantages and disadvantages for rate control algorithms in the enhancement layer,summarize the optimal solution for temporal and spatial scalable rate control in the enhancement layer.Finally,prospect the future development of rate control technology in scalable video coding.