| 摘要 |
PURPOSE: A method and an apparatus for intra mode coding are provided to determine flexibly a priority of intra mode of a current block according to intra modes of surrounding blocks adjacent to the current block considering spatial correlation in the intra mode coding, and perform Huffman coding of the intra mode of the current block according to the determined priority, thereby improving coding efficiency. CONSTITUTION: An apparatus for intra mode coding determines a priority of intra mode for Huffman encoding while varying the priorities of an upper block and a left block, which are adjacent to a current block to be encoded, according to a selected intra mode (410-455). The apparatus for intra mode coding performs Huffman encoding on the intra mode of the current block according to the determined priority of intra mode (460). [Reference numerals] (410) Select the intra mode of a present block; (420) Determine the right and left block intra modes of a present block with MPM; (430) The intra mode of a present block corresponds to the MPM?; (435) Code MPM information; (441) Right and left block intra modes are DC and Planar mode, another mode?; (442) One of the right and left block intra modes is a Planar mode, what is the other?; (443) One of the right and left block intra modes is a DCmode, what is the other?; (444) Right and left block intra modes include DC and Planar mode ?; (451) Planar , DC, direction mode order; (452) DC, direction mode order; (453) Planar, direction mode order; (454) Preset priority order; (455) First order Planar, next order priority order; (456) First order DC, next order priority order; (460) Perform Hipman coding according to intra mode priority order; (AA) Start; (BB,DD,EE,FF,GG,HH,II) Yes; (CC) No; (JJ) Right and left block intra modes are DC modes?; (KK) Right and left block intra modes are Planar modes?; (LL) End
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