Patent ID: 11917133
Assignee: JVCKENWOOD CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A moving-picture decoding device for performing an affine transform in units of decoding blocks, the moving-picture decoding device comprising:
a subblock-based temporal merging candidate derivation unit configured to derive a subblock-based temporal merging candidate which comprises a motion vector and a flag indicating whether or not a prediction subblock is valid for each reference list in units of subblocks;
an affine inheritance merging candidate derivation unit configured to derive an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a decoding target block in a space domain;
an affine construction merging candidate derivation unit configured to derive an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the decoding target block in a space or time domain;
an affine fixation merging candidate derivation unit configured to derive an affine fixation merging candidate in which motion information of an affine control point is fixed, and
a subblock-based merging candidate selection unit configured to select a subblock-based merging candidate from the subblock-based temporal merging candidate, the affine inheritance merging candidate, the affine construction merging candidate and the affine fixation merging candidate,
wherein the affine fixation merging candidate derivation unit is further configured to fix a motion vector of each affine control point of the affine fixed merge candidate to (0, 0).