  Regular omnidirectional video encoding technics use map projection to flatten
a scene from a spherical shape into one or several 2D shapes. Common projection
methods including equirectangular and cubic projection have varying levels of
interpolation that create a large number of non-information-carrying pixels
that lead to wasted bitrate. In this paper, we propose a tile based
omnidirectional video segmentation scheme which can save up to 28% of pixel
area and 20% of BD-rate averagely compared to the traditional equirectangular
projection based approach.
