一种低时延的全景视频传输方法  

A low-latency method for panoramic video transmission

作　　者：李鹏[1] 黎军[2] 杨明祎 胡伟涛 LI Peng;LI Jun;YANG Mingyi;HU Weitao(Xidian University,Xi’an 710071,China;China Academy of Space Technology(Xi’an),Xi’an 710000,China)

机构地区：[1]西安电子科技大学,西安710071 [2]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2022年第2期55-63,共9页Space Electronic Technology

基　　金：国家自然科学基金(编号:61601348);国家重点实验室基金(编号:6142411194215)。

摘　　要：近年来,以全景视频为代表的虚拟现实技术向高质量、沉浸感的方向发展,低时延全景视频传输技术的研究成为热点。对全景视频传输中影响终端用户体验质量的时延因素进行分析,提出了一种低时延的全景视频传输方法,使用随机接入帧间预测帧来减小视口切换引起的传输时延,进而改善用户的视觉体验质量。经理论分析和仿真实验,在不影响用户体验质量的前提下,针对不同内容的测试序列,该方法可以将视口切换时延平均降低至2.4帧时长,同时将用于用户视口切换的视频码率平均减少20.23%。相比于已有方法,该方法可以在降低时延的同时,提升传输带宽利用率,为实现全景视频的高效传输提供了一种新的技术途径。Recently,there has been a significant development towards panoramic videos in virtual reality technology,which can provide high perceptual quality and immersive experience.Consequently,the study of providing low latency panoramic videos service has become a hot topic.In this paper,factors related to latency that affect the quality of experience of users in panoramic video transmission system are analyzed,and a low latency method for panoramic video transmission is proposed.By using inter-frame prediction techniques in random access configuration,transmission delay caused by switching viewport is reduced,and the user’s visual experience quality is also improved.Through theoretical analysis and simulation,the proposed method can reduce the time delay of viewport switching to 2.4 frames on average and reduce the video bit rate of user viewport switching by 20.23% on average for different video sequences,without affecting the quality of user experience.This method can reduce the latency and improve the bandwidth utilization,which provides a new technical approach for efficient transmission of panoramic videos.

关 键 词：360°全景视频 视频编码 视频传输 低时延 

分 类 号：TN919[电子电信—通信与信息系统]