MobiCom 2020
GROOT
A real-time streaming system for high-fidelity volumetric videos on mobile AR devices.
GROOT is a mobile 3D volumetric video streaming system for immersive augmented reality. Volumetric video streaming is challenging because point-cloud data is much larger than conventional 2D or 360-degree video, and 3D data is sparse and unorganized compared with fixed-size image grids.
The system introduces a Parallel Decodable Tree data structure to compress and decode volumetric videos on mobile GPUs at real-time frame rates with minimal resource use. It integrates decoding and rendering in a single pipeline and supports fast modification for user-adaptive optimization.