The defense of PhD thesis of Xavier Corbillon will be held on October 30th at 10:15 at IMT Atlantique, Rennes Campus , Petit Amphi. The thesis title is “Enable the next generation of interactive video streaming”.
Abstract
Omnidirectional videos, also denoted as spherical videos or 360° videos, are videos with pixels recorded from a given viewpoint in every direction of space. A user watching such an omnidirectional content with a Head Mounted Display (HMD) can select the portion of the video to display, usually denoted as viewport, by moving her head. To feel high immersion inside the content a user needs to see viewport with 4K resolution and 90 Hz frame rate. With traditional streaming technologies, providing such quality would require a data rate of more than 100 Mbps , which is far too high compared to the median Internet access bandwidth. In this dissertation, I present my contributions to enable the streaming of highly immersive omnidirectional videos on the Internet. We can distinguish six contributions : a viewport-adaptive streaming architecture proposal reusing a part of existing technologies ; an extension of this architecture for videos with six degrees of freedom ; two theoretical studies of videos with non-homogeneous spatial quality ; an open-source software for handling 360° videos ; and a dataset of recorded users’ trajectories while watching 360° videos. The work done during this thesis was published in eight international conferences and in one journal, and resulted in three “Best Paper Award”s.
Keywords
Omnidirectional Video, 360°Video, Viewport-Adaptive Streaming, DASH, HEVC
