METHOD AND APPARATUS FOR IMAGE ENCODING/DECODING

摘要

A video decoding apparatus using an intra prediction, includes: a decoder to obtain mode information of a current block and residual sub-blocks corresponding to a plurality of sub-blocks included in the current block, from a bitstream; an intra predictor to select an intra prediction mode of the current block from among a plurality of intra prediction modes, based on the obtained mode information, identify the plurality of sub-blocks of the current block, and sequentially predict the plurality of sub-blocks by using neighboring pixels adjacent to each of the plurality of sub-blocks; an inverse quantization and transform unit configured to inversely quantize and then inversely transform each of the residual subblocks; and an adder configured to sequentially reconstruct the plurality of sub-blocks by adding each of the predicted sub-blocks to an inversely quantized and inversely transformed residual sub-block corresponding thereto.

主权项

1. A video decoding apparatus using an intra prediction, the apparatus comprising:
a decoder configured to obtain mode information of a current block and residual sub-blocks corresponding to a plurality of sub-blocks included in the current block, from a bitstream; an intra predictor configured to
select an intra prediction mode of the current block from among a plurality of intra prediction modes, based on the obtained mode information,identify the plurality of sub-blocks of the current block, andsequentially predict 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; an inverse quantization and transform unit configured to inversely quantize and then inversely transform each of the residual subblocks; and an adder configured to sequentially reconstruct the plurality of sub-blocks by adding each of the predicted sub-blocks to an inversely quantized and inversely transformed residual sub-block corresponding thereto, wherein one or more pixels of a pre-reconstructed sub-block within the current block are used as part of the neighboring pixels for predicting at least one non-reconstructed sub-blocks adjacent to the pre-reconstructed sub-block.