| CPC H04N 19/105 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/96 (2014.11)] | 15 Claims |
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1. A video decoding method of predicting a picture, which is split into equal-sized coding tree blocks, in units of blocks, the video decoding method comprising:
reconstructing a block vector for a current coding block in a current coding tree block to be decoded, by decoding block vector information from a bitstream, wherein the current coding block is one of blocks split from the current coding tree block in a tree structure; and
setting, as a prediction block of the current coding block, a reference block indicated by the block vector in the picture in which the current coding block is located,
wherein a value of the block vector is limited to prevent the reference block from being located outside a search area that is set in at least one of the current coding tree block and a left coding tree block of the current coding tree block, and
the search area is selected from pre-decoded processing regions among a plurality of processing regions which are split in an equal size from each of the current coding tree block and the left coding tree block, and
wherein a processing region of a plurality of processing regions in the left coding tree block, which is co-located with a current processing region including the current coding block, is not set as the search area for the current coding block and a coding block which is included in the current coding tree block and is to be decoded after the current coding block.
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