Intra mode decision algorithm of macroblock in video coding

摘要

Ratio in the image codec according to the H.264 / AVC standard - to provide a procedure for determining the intra-macroblock mode for distortion optimization (RDO). Algorithm according to one embodiment of the present invention is the 4 × 4 blocks according to the luminance 4 × 4 prediction mode for each of the conversion each predicted luminance 4 × 4 prediction block into the frequency domain, and then the luminance 4 × 4 prediction mode, respectively, for using the complete predicted conditions, luminance 4 × 4 prediction mode calculates a 4 × 4 frequency error cost (FEC) for respectively, 4 × 4 16 for the luminance in each 16 × 16 prediction mode using the FEC × 16 FEC the calculation and, 4 × 4 blocks, for each, a 4 × 4 FEC is 4 × 4 candidate modes set including a luminance 4 × 4 prediction mode is the 4 × 4 day forecasts mode (PPM) with the minimum (CMS) confirmation and, 16 × 16 FEC luminance is a minimum 16 × 16 prediction mode, the candidate modes confirmed the 16 × 16 CMS containing, 16 × 16 with respect to the prediction mode is included in each of the 16 × 16 candidate modes set confirmed obtain RDCost select the 16 × 16 best mode and, 16 × 16 best mode and confirmed the 8 × 8 CMS containing the same 8 × 8 chrominance prediction mode and the 8 × 8 chrominance DC prediction mode, and, 4 × 4 blocks, respectively 4 × 4 for the CMS, CMS 16 × 16, and selects an intra-macroblock mode for the luminance and color-difference by using only prediction modes included in each of the 8 × 8 CMS. ; Intra-prediction, H.264 / AVC, the intra-macroblock mode, high speed mode selection