Minsu Kim  Heekwang Kim  Kwangsue Chung

10.5626/JOK.2018.45.8.856

QoE HTTP Adaptive Streaming UHD video

With the development of networks and the spread of smart devices, the demand for UHD (Ultra High Definition) video is increasing, and HTTP Adaptive Streaming is attracting attention. The existing quality adaptation scheme has a problem, in that quality of experience (QoE) degrades because of bandwidth measurement that does not take into consideration VBR (Variable Bit Rate) content characteristics and quality selection using only measured bandwidth or buffer occupancy. In this paper, we propose a quality adaptation scheme based on VBR content characteristics to improve the QoE of UHD streaming service. The proposed scheme measures the bandwidth by considering the VBR content characteristics. The requested quality is selected based on the quality adaptation interval reflecting the change in the buffer occupancy, thereby increasing the average quality and minimizing unnecessary quality change. Experimental results show that the proposed scheme improves QoE with higher average quality and less quality change than do existing schemes.