Abstract
Volumetric media (or hologram video), the medium for representing
natural content in VR/AR/MR, is presumably the next generation of video
technology and a typical use case for 5G and beyond wireless
communications. To realize volumetric media applications, efficient
volumetric media streaming methods are in critical demand. To this end,
this article studies the challenges for and solutions to wireless
transmission systems of point cloud video, which is the most popular and
favored way to represent volumetric media and significantly differs from
the other types of videos. In particular, we first discuss point cloud
video technology and its applications and then the challenges of and
solutions to point cloud video streaming in 5G systems and beyond,
including encoding, tiling, viewing angle prediction, decoding, quality
assessment and transmission optimization. A prototype of DASH-based
point cloud video streaming system is introduced as a preliminary study,
along with more simulation results to verify the performance of the
proposed scheme. Moreover, future research directions are identified for
providing high-quality point cloud video streaming.