虚拟现实视频传输架构和关键技术

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 provide 360°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.