Patent ID: 8818114
Filing Date: 2014-08-26
Classification: H04N

Abstract:
1. A video decoding method using intra prediction, the method comprising: obtaining mode information of a current block from a bitstream; selecting an intra prediction mode of the current block from a plurality of intra prediction modes based on the obtained mode information; identifying a plurality of sub-blocks of the current block when the current block is divided into the plurality of sub-blocks; and reconstructing the plurality of sub-blocks based on respectively predicting the plurality of sub-blocks by using neighboring pixels adjacent to each of the plurality of sub-blocks, wherein each of the plurality of sub-blocks is predicted by using the same intra prediction mode of the current block selected based on the obtained mode information, wherein the reconstructing of the plurality of sub-blocks comprises: predicting one of the plurality of sub-blocks; reconstructing a residual sub-block corresponding to the predicted sub-block by decoding the bitstream; and adding the predicted sub-block to the reconstructed residual sub-block to thereby reconstruct the sub-block, wherein one or more pixels in the reconstructed sub-block are used as part of the neighboring pixels for predicting at least one non-reconstructed sub-block adjacent to the reconstructed sub-block.