DocumentCode :
2925671
Title :
Analytical method for objective scoring of HTTP Adaptive Streaming (HAS)
Author :
Krogfoss, Bill ; Agrawal, Anshul ; Sofman, Lev
Author_Institution :
Bell Labs., Alcatel Lucent, Plano, TX, USA
fYear :
2012
fDate :
27-29 June 2012
Firstpage :
1
Lastpage :
6
Abstract :
We demonstrate in this paper the relationship between viewer QoE (quality of experience) and MOS (Mean Opinion Score) and the HTTP Adaptive Streaming Video Quality (VQ) rate. We will show that MOS scores are impacted by the variance (or standard deviation-SD) of the VQ rate more so than the mean VQ level. Correlation between MOS and the standard deviation of the delivered VQ rate is 2:1 greater than between MOS and the mean VQ rate. In other words users care more about maintaining a consistent VQ level than they do in a higher bit rate. We also show that inelasticity exists between the mean VQ rate and MOS scores, where multi megabit changes in VQ rates result in only modest changes in MOS scores. Finally we demonstrate that we can accurately predict MOS scores incorporating both the mean VQ level and the SD of the VQ level. Two analytical methods are given for predicting MOS, and are shown to have a high correlation and low error.
Keywords :
Internet; transport protocols; video streaming; HAS VQ rate; HTTP adaptive streaming video quality rate; MOS scores; QoE; mean VQ level; mean opinion score; objective scoring; quality-of-experience; standard deviation; Correlation; Equations; Linear approximation; Mathematical model; Standards; Streaming media; HAS; MOS; QoE; Video Quality;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Broadband Multimedia Systems and Broadcasting (BMSB), 2012 IEEE International Symposium on
Conference_Location :
Seoul
ISSN :
2155-504
Print_ISBN :
978-1-4673-0293-7
Electronic_ISBN :
2155-504
Type :
conf
DOI :
10.1109/BMSB.2012.6264244
Filename :
6264244
Link To Document :
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