| dc.description.abstract | In this paper, we compare the end-user Quality of Experience (QoE) of two of the most popular streaming applications: Video on Demand (VoD) applications and Passive Video Game (PVG) streaming applications. Previous studies have shown that in real-life traffic, the Quality of Service (QoS) metrics such as packet delay and packet loss ratio (PLR) have cross-correlation between them. Very few studies have been done on how the correlated QoS metrics affect the end user QoE. In previous work, we have shown that correlated QoS metrics map objective QoE differently than non-correlated QoS metrics. Following the findings, we carried out a subjective QoE analysis to observe if it shows a similar outcome as objective QoE. We used a bespoke version of the NetEm emulator, which allowed us to implement cross-correlated QoS inputs and carried out a subjective QoE survey using 42 human subjects for both VoD and PVG streaming applications. The result showed for low PLR conditions, QoE in both correlated and non-correlated PLR showed similar ratings. But as PLR increased, the average QoE of correlated QoS was considerably higher (sometimes about 50%) than its non-correlated counterparts. It was observed for both VoD and PVG applications. This was more pronounced in the case of PVG when the experience of the subject was taken into consideration. We also found that age and gender do not show significant differences in the subjective QoE. Finally, we compared the existing state-of-the-art objective quality assessment with the subjective QoE of PVG application. We found that QoE with correlated PLR showed a higher correlation coefficient with the existing objective QoE metrics than the non-correlated counterparts. This finding solidifies the importance of studying QoE using correlated QoS metrics. | en_US |
