Adaptive 360 VR Video Streaming based on MPEG-DASH SRD

摘要

We demonstrate an adaptive bandwidth-efficient 360 VR video streaming systembased on MPEG-DASH SRD. We extend MPEG-DASH SRD to the 3D space of 360 VRvideos, and showcase a dynamic view-aware adaptation technique to tackle thehigh bandwidth demands of streaming 360 VR videos to wireless VR headsets. Wespatially partition the underlying 3D mesh into multiple 3D sub-meshes, andconstruct an efficient 3D geometry mesh called hexaface sphere to optimallyrepresent tiled 360 VR videos in the 3D space. We then spatially divide the 360videos into multiple tiles while encoding and packaging, use MPEG-DASH SRD todescribe the spatial relationship of tiles in the 3D space, and prioritize thetiles in the Field of View (FoV) for view-aware adaptation. Our initialevaluation results show that we can save up to 72% of the required bandwidth on360 VR video streaming with minor negative quality impacts compared to thebaseline scenario when no adaptations is applied.