Display Pixel Caching

We present a new video mode for television sets that we refer to as display pixel caching (DPC). It can be used to view lower resolution video content on higher resolution screens. In contrast to conventional stretch and zoom modes, DPC fills empty screen borders with spatially and temporally consistent information while preserving the original format ratio and resolution. The filled content is derived from a motion analysis of the input video. We explain how the locally varying flow field that results from arbitrary camera and object motion can be segmented and warped, and how content that is cached in the border regions can be initialized and cleared appropriately. With our current GPU implementation of DPC, we achieve real-time rates of 50-15 fps for input resolutions ranging from PAL up to full HD (1080p), and with cache resolutions of 720p up to 4x1080p.