2D Plus Delta (AKA 2D+Delta) is a method of encoding
3D image listed as a part of
MPEG2 and
MPEG4 standards, specifically on the
H.264 implementation of
Multiview Video Coding extension. This technology originally started as a proprietary method for
Stereoscopic Video Coding and content deployment that utilizes the Left or Right channel as the 2D version and the optimized difference or disparity (Delta) between that image channel view and a second eye image view is injected into the videostream as user_data, secondary stream, independent stream, enhancement layer or NALu for deployment. The Delta data can be either a spatial stereo disparity, temporal predictive, bidirectional or optimized
motion compensation.