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http://dx.doi.org/10.5909/JBE.2019.24.6.948

An Advanced QER Selection Algorithm Based on MMT Protocol for 360-Degree VR Video Streaming  

Kim, A-young (Division of Computer and Telecommunications Engineering, Yonsei University)
An, Eun-bin (Division of Computer and Telecommunications Engineering, Yonsei University)
Seo, Kwang-deok (Division of Computer and Telecommunications Engineering, Yonsei University)
Publication Information
Journal of Broadcast Engineering / v.24, no.6, 2019 , pp. 948-955 More about this Journal
Abstract
As interests in 360-degree VR (Virtual Reality) video services enormously grow, compression and streaming technologies for VR video data have been rapidly developed. Quality Emphasized Region (QER) based streaming scheme has been developed as a kind of viewport-adaptive 360-degree video streaming technology for maintaining immersive experience and reducing bandwidth waste. For selecting a QER corresponding to the user's gaze coordinate, QER-based streaming scheme requires the calculation of Quality Emphasis Center (QEC) distance and signaling message delivery for requesting QER switching. QEC distance calculations require high computational complexity because of repeated calculations as many times as the number of QERs. Furthermore, the signaling message interval results in a trade-off relationship between efficient bandwidth usage and flexible QER switching. In this paper, we propose an improved QER selection algorithm based on MMT protocol to solve this problem. The proposed algorithm could achieve computational complexity reduction by using preprocessed QER_ID_MAP. Also, flexible QER switching could be achieved, as well as efficient bandwidth utilization by an adaptive adjustment of the signaling interval.
Keywords
Video Streaming; Virtual Reality (VR); Quality Emphasize Region(QER); Viewport adaptive streaming; MPEG media transport (MMT);
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