虚拟现实视频传输架构和关键技术  

Architecture and Key Technologies of Virtual Reality Video Transmission and Streaming

作　　者：郭宗明[1] 班怡璇 谢澜[1] GUO Zongming;BAN Yixuan;XIE Lan(Peking University, Beijing 100871, China)

机构地区：[1]北京大学,北京100871

出　　处：《中兴通讯技术》2017年第6期19-23,共5页ZTE Technology Journal

基　　金：国家自然科学基金(61471009)

摘　　要：介绍了虚拟现实(VR)视频传输架构,提出了两种传输方式:全景传输和视点传输。全景传输可提供多角度质量均匀的图像,但存在高码率和带宽浪费问题;视点传送仅传输视点范围内图像,可减少码率浪费,但存在头部运动延迟问题。提出的视点自适应传输技术、视点预测方法,可以较好地实现低码率、高质量的VR视频传输。In this paper,a main framework of virtual reality(VR)video transmission is introduced,and two schemes are also proposed:panorama transmission and viewport transmission.The panorama transmission can provide360°symmetric image with high bit-rate and bandwidth wasting;the viewport transmission only transmits a part of images so as to reduce bit-rate wasting,but can cause head movement delay.In this paper,viewport-adaptive streaming and viewport prediction technologies are introduced,which enable high quality service of VR video streaming.

关 键 词：VR视频 视点自适应传输 非均匀映射传输 分块传输 视点预测 用户质量优化 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]