| CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] | 8 Claims |
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1. A picture coding device that performs coding in units of intra block copy standard blocks, the device comprising:
a block vector candidate derivation unit structured to derive block vector candidates of a target block in a target picture from coding information stored in coding information storage memory;
a replenisher structured to add (0,0) to the block vector candidates;
a selector structured to select a selected block vector from the block vector candidates;
a reference position correction unit structured to perform a correction regarding a reference block to be referred to by the selected block vector so that a reference position of the reference block is to be corrected to refer to an inside of a referenceable region; and
a prediction unit structured to acquire a decoded sample in the target picture from decoded picture memory as a prediction value of the target block based on a reference position of the reference block,
wherein the reference position correction unit sets a fixed number of intra block copy standard blocks subjected to a coding process immediately before an intra block copy standard block including the target block as a referenceable region, and sets an intra block copy standard block before the referenceable region as an invalid reference region regardless of whether the coding process is completed.
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