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	基于TCP协议的音频流媒体QoE的定量研究
	高宇 ; 窦维蓓 ; GAO Yu ; DOU Weibei
	2016-03-30 ; 2016-03-30
关键词	QoE TCP 音频 流媒体 主观测试 QoE TCP audio multimedia streaming subjective tests TN919.8
其他题名	Quantification Study on QoE of TCP-based Audio Steaming
中文摘要	流媒体接收端音频的初始延时或中断,以及采用自适应播放产生的播放速率变化是基于TCP协议的音频流媒体的用户体验质量下降的主要原因。介绍了一种中断强度的概念,并通过模拟实际网络环境的主观音质测试方法来分析中断强度对QoE的影响。结果表明,在可用带宽发生变化时,中断强度和主观音质测试得分有很好的相关性,平均相关系数为-0.9。从而表明中断强度可以作为评价音频流媒体QoE的客观评价参数。此外,还对播放速率变化对QoE的影响进行了主观音质测试,变速算法为波形相似叠加算法。测试结果显示,当变速因子超过105%时,音质下降严重,测试结果可以作为自适应播放中参数设置的参考。; QoE( Quality of Experience) degradation of TCP-based audio streaming mainly comes from initial buffering time or interruptions and changing of playout speed used in adaptive media playout. In the study,the pause intensity presented as a buffer behavior metric is used in QoE evaluation. The pause intensity is verified through network-simulation-based subjective audio quality assessments. The results show that,with the changing of network bandwidth,the metric pause intensity isclosely related to subjective audio quality assessment scores,with average correlation coefficient of-0. 9. It verifies the effectiveness of the pause intensity as objective quality metric in QoE evaluation of TCP-based audio streaming. Besides,a set of subjective audio quality assessments designed for studying the effect of variation of playout speedon QoE is also presented in this paper,the WSOLA( Wave Similarity OverLap and Add) algorithmis used for audio playout speed altering. The assessments results show that audio quality degrades notably when speed changing factor is greater than 105%. These results can be used as reference for parameters design in adaptive media playout.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/146623]
专题	清华大学
推荐引用方式 GB/T 7714	高宇,窦维蓓,GAO Yu,等. 基于TCP协议的音频流媒体QoE的定量研究[J],2016, 2016.
APA	高宇,窦维蓓,GAO Yu,&DOU Weibei.(2016).基于TCP协议的音频流媒体QoE的定量研究..
MLA	高宇,et al."基于TCP协议的音频流媒体QoE的定量研究".(2016).

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