Simplification mode decision for intra prediction

摘要

A method of encoding video data, wherein the method comprises: obtaining a plurality of intra prediction modes available for coding a current block of video data; calculating an approximate cost for each prediction mode Intra identified in a current set of modes of intra prediction of the plurality of modes of intra prediction which includes a predefined set of modes of intra prediction having at least one mode of intra prediction, wherein the current set of intra prediction modes include prediction modes intra least the plurality of intra prediction modes available for coding the current block of video data; calculating an approximate cost for one or more modes most likely intra prediction for the current block based on certain modes of intra prediction used to code one or more contiguous data blocks adjacent to the current block video; comparing each of the calculated approximate costs for one or more modes of intra prediction more likely with a threshold; replacement of one or more intra prediction modes identified in the current set of intra prediction modes by the one or more intra prediction modes most likely if the comparison meets the threshold; an analysis rate-distortion with respect to each mode of intra prediction identified in the current set of modes of intra prediction to determine a rate-distortion cost for each mode of intra prediction identified in the current set of modes of intra prediction after said replacement of one or more intra prediction modes identified in the current set of intra prediction modes for one or more modes most likely intra prediction based on the comparisons; and performing intra prediction coding with respect to the current block according to one of the intra prediction modes identified in the current set of intra prediction modes based on rate-distortion costs determined for coding the current block.