To improve the playout quality of video streaming services, several adaptive media playout (AMP) mechanisms were proposed in\r\nliterature.However, all performance evaluations and comparisons forAMPs weremade in terms of quality of service (QoS) metrics.\r\nAs one knows, there may exist a trade-off between QoS metrics, such as buffer underflow and overflow performance. Thus, it is\r\nnot sufficient to only evaluate the performance of AMPs in terms of QoS metrics. In this paper, we will evaluate and compare the\r\nperformance of several AMPs from the aspect of quality of experience (QoE). Numerical results will show that some existing AMP\r\nsystems do not perform better than the nonadaptive playout system from the point of view of overall QoE.
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