Improved SAP based on adaptive directional prediction for HEVC lossless intra prediction ?
It introduces a new method to estimate the prediction direction of each pixel. It introduces the frame-level pretreatment which greatly improves the speed. It could save the output bitrate by about 9.4158%. The encoding and decoding time are reduced by about 11%. When the PU size gets larger, the increase of output bitrate is the least.
sap hevc frame-level pretreatment intra-coding lossless video coding linear interpolation prediction modes adsap