Patent ID: 11936849
Assignee: JVCKENWOOD CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A picture decoding device that performs decoding 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 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 and an intra block copy standard block including the target block as an invalid reference region regardless of whether the coding process is completed.