SHVC Tile-Based 360-Degree Video Streaming for Mobile VR: PC Offloading Over mmWave.
SHVC Tile-Based 360-Degree Video Streaming for Mobile VR: PC Offloading Over mmWave.
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DOI：
10.3390/s18113728
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发表时间：
2018-11-01
期刊：
影响因子：
--
通讯作者：
Ryu ES
中科院分区：
文献类型：
--
作者：
Nguyen DV;Le TT;Lee S;Ryu ES
360-用于高质量虚拟现实（VR）的30度视频流对于当前无线系统是具有挑战性的，因为它需要巨大的带宽。然而，60 GHz频带中的毫米波（mmWave）通信已经获得了工业界和学术界的相当大的兴趣，因为它承诺在巨大的未授权带宽（即，高达7 GHz）。这种大规模的非授权带宽为满足360度视频流的需求提供了巨大的潜力。本文研究了360度视频流的问题，移动的VR使用SHVC，可扩展的高效率视频编码（HEVC）标准和PC卸载超过60 GHz的网络。我们提出了一个概念架构的基础上，先进的平铺SHVC和毫米波通信。该架构包括两个主要部分。(1)用于360度视频流和优化并行解码的基于瓦片的SHVC。(2)个人计算机（PC）卸载机制，用于传输未压缩视频（仅视口）。实验结果表明，我们的瓦片提取器方法减少了超过47%的360度视频流所需的带宽和瓦片分区机制提高了25%的解码时间。PC卸载机制还成功地将360度解码（或仅视口）视频卸载到使用毫米波通信和所提出的传输方案的移动的设备。
360-degree video streaming for high-quality virtual reality (VR) is challenging for current wireless systems because of the huge bandwidth it requires. However, millimeter wave (mmWave) communications in the 60 GHz band has gained considerable interest from the industry and academia because it promises gigabit wireless connectivity in the huge unlicensed bandwidth (i.e., up to 7 GHz). This massive unlicensed bandwidth offers great potential for addressing the demand for 360-degree video streaming. This paper investigates the problem of 360-degree video streaming for mobile VR using the SHVC, the scalable of High-Efficiency Video Coding (HEVC) standard and PC offloading over 60 GHz networks. We present a conceptual architecture based on advanced tiled-SHVC and mmWave communications. This architecture comprises two main parts. (1) Tile-based SHVC for 360-degree video streaming and optimizing parallel decoding. (2) Personal Computer (PC) offloading mechanism for transmitting uncompressed video (viewport only). The experimental results show that our tiled extractor method reduces the bandwidth required for 360-degree video streaming by more than 47% and the tile partitioning mechanism was improved by up to 25% in terms of the decoding time. The PC offloading mechanism was also successful in offloading 360-degree decoded (or viewport only) video to mobile devices using mmWave communication and the proposed transmission schemes.
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