HDR and WCG coding architecture with SDR backwards compatibility in a single bitstream for video coding

摘要

Techniques are described for processing video data to conform to a high dynamic range (HDR)/wide color gamut (WCG) color container. Operations may be applied to video data in certain color spaces to enable compression of High Dynamic Range (HDR) and Wide Color Gamut (WCG) video in such a way that an existing receiver without HDR and WCG capabilities would be able to display a viewable Standard Dynamic Range (SDR) video from the received bitstream without any additional processing. Certain embodiments enable delivery of a single bitstream from which an existing decoder obtains the viewable SDR video directly and an HDR capable receiver reconstruct the HDR and WCG video by applying the specified processing. Such embodiments may improve the compression efficiency of hybrid based video coding systems utilized for coding HDR and WCG video data.