Low-Latency VR Video Processing-Transmitting System Based on Edge Computing

IF 3.2 1区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Broadcasting Pub Date : 2024-04-11 DOI:10.1109/TBC.2024.3380455

Nianzhen Gao;Jiaxi Zhou;Guoan Wan;Xinhai Hua;Ting Bi;Tao Jiang

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引用次数: 0

Abstract

The widespread use of live streaming necessitates low-latency requirements for the processing and transmission of virtual reality (VR) videos. This paper introduces a prototype system for low-latency VR video processing and transmission that exploits edge computing to harness the computational power of edge servers. This approach enables efficient video preprocessing and facilitates closer-to-user multicast video distribution. Despite edge computing’s potential, managing large-scale access, addressing differentiated channel conditions, and accommodating diverse user viewports pose significant challenges for VR video transcoding and scheduling. To tackle these challenges, our system utilizes dual-edge servers for video transcoding and slicing, thereby markedly improving the viewing experience compared to traditional cloud-based systems. Additionally, we devise a low-complexity greedy algorithm for multi-edge and multi-user VR video offloading distribution, employing the results of bitrate decisions to guide video transcoding inversely. Simulation results reveal that our strategy significantly enhances system utility by 44.77% over existing state-of-the-art schemes that do not utilize edge servers while reducing processing time by 58.54%.

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基于边缘计算的低延迟 VR 视频处理与传输系统

随着实时流媒体的广泛应用，虚拟现实（VR）视频的处理和传输必须满足低延迟要求。本文介绍了一种用于低延迟虚拟现实视频处理和传输的原型系统，该系统利用边缘计算来发挥边缘服务器的计算能力。这种方法可实现高效的视频预处理，并促进更接近用户的组播视频分发。尽管边缘计算潜力巨大，但管理大规模接入、处理不同的信道条件以及适应不同的用户视口都给 VR 视频转码和调度带来了巨大挑战。为了应对这些挑战，我们的系统利用双边缘服务器进行视频转码和切片，从而与传统的云系统相比显著改善了观看体验。此外，我们还为多边缘和多用户 VR 视频卸载分配设计了一种低复杂度的贪婪算法，利用比特率决策结果反向指导视频转码。仿真结果表明，与不利用边缘服务器的现有先进方案相比，我们的策略显著提高了 44.77% 的系统效用，同时减少了 58.54% 的处理时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Broadcasting 工程技术-电信学

CiteScore

9.40

自引率

31.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Society’s Field of Interest is “Devices, equipment, techniques and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.” In addition to this formal FOI statement, which is used to provide guidance to the Publications Committee in the selection of content, the AdCom has further resolved that “broadcast systems includes all aspects of transmission, propagation, and reception.”