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.
作者
郭宗明
班怡璇
谢澜
GUO Zongming;BAN Yixuan;XIE Lan(Peking University, Beijing 100871, China)
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)
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
VR video
viewport adaptation streaming
asymmetric projection streaming
tile-based streaming
viewport prediction
QoE optimization
