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	Towards simple and smooth rate adaption for VBR video in DASH
	Zhou, Yanping ; Duan, Yizhou ; Sun, Jun ; Guo, Zongming
	2015
英文摘要	Rate adaption in Dynamic Adaptive Streaming over HTTP (DASH) is widely applied to adapt the transmission rate to varying network capacity. For rate adaption on variable bitrate (VBR) encoded video, it is still a challenge to properly identify and address the dynamics of bandwidth and segment bitrate. In this paper, the trend of client buffer level variation (TBLV) is analyzed to be a more effective metric for detecting the dynamics of bandwidth and segment bitrate compared to previous metrics. Then, a partial-linear trend prediction model is developed to accurately estimate TBLV. Finally, based on the prediction model, a novel simple rate adaption algorithm is designed to achieve efficient and smooth video quality level adjustment. Experimental results show that while maintaining similar average video quality, the proposed algorithm achieves up to 47.3% improvement in rate adaption smoothness compared to the existing work. ? 2014 IEEE.; EI; 0
语种	英语
DOI标识	10.1109/VCIP.2014.7051491
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/321416]
专题	计算机科学技术研究所
推荐引用方式 GB/T 7714	Zhou, Yanping,Duan, Yizhou,Sun, Jun,et al. Towards simple and smooth rate adaption for VBR video in DASH. 2015-01-01.

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