Patent ID: 8437562

Claim:
A method for intra-prediction mode optimization, determining an intra-prediction mode of a target block of an image to obtain an intra-prediction pattern of the target block, comprising: selecting a control block from reference blocks of the target block; regarding an intra-prediction mode adopted in the control block as a control mode; and assessing intra-prediction efficiency, under the control mode, of the control block and the target block, wherein: when the intra-prediction efficiency, under the control mode, of the target block is better than that of the control block, the control mode is determined to be the intra-prediction mode of the target block, to obtain the intra-prediction pattern of the target block, accordingly; when the intra-prediction efficiency of the control block is better than the intra-prediction efficiency, under the control mode, of the target block, another one of the reference blocks is selected to be the control block and the control mode is refreshed, accordingly, and the step of assessing the intra-prediction efficiency is repeated.