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.
This paper describes an adaptive scheme of 360‐degree video streaming over millimeter‐wave (mmWave) communication for cyberphysical system. It consists of two parts, ie, (1) 360‐degree video streaming and offloading over mmWave 802.11ad 60 GHz wireless link and (2) 360‐degree video decoding, postprocessing, and display by using scalable high‐efficiency video coding. The mmWave communication is high‐speed wireless technology to increase the capacity of video transmission. However, current studies on video streaming over mmWave focus on long distance, and mobile devices process many tasks such as video decoding, postprocessing, and display by themselves. Therefore, the performance of mobile device seriously degrades in the case of high‐resolution video streaming, such as 4K. Furthermore, the synchronization of real‐time video streaming at high speed is an important issue to ensure the quality of service (QoS), especially when the mobile device is moving. Thus, this paper focuses on real‐time video streaming over mmWave with optimized QoS for high‐resolution video. Furthermore, this study implemented an offloading mechanism to handle the offloading tasks between a powerful GPU‐based PC and a mobile device. The experimental results show that the proposed method provides high‐performance 360‐degree video streaming in QoS‐sensitive video streaming applications.
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