Granted Patent B2

US 12,695,882 · App. 18/885,435 · Granted Jul 28, 2026

Inventor: Hyeongmoon Jang (Seoul, KR)

Assignee: NOKIA TECHNOLOGIES OY

H04N19/159H04N19/105H04N19/137H04N19/176H04N19/52

Abstract

Claims (42)

1 . An apparatus comprising:

a memory configured to store an image; and

a processor coupled with the memory,

wherein the processor is configured to:

generate a merge candidate list including at least one of a spatial neighboring block and a temporal neighboring block of a current block, and including candidates equal to or less than a maximum number of merge candidates, based on that a merge mode is applied to the current block;

obtain a merge index indicating a candidate to be used for an inter prediction of the current block in the merge candidate list;

derive motion vectors of each subblocks included in the current block based on motion vectors of the candidate indicated by the merge index;

generate a prediction block of the current block based on the motion vectors of each subblocks;

perform inverse-transform on transformed coefficients of the current block to generate a residual block of the current block; and

generate a reconstructed block of the current block based on the prediction block and the residual block,

wherein the processor is further configured to:

based on that a width and a height of the current block are respectively greater than or equal to a pre-defined minimum size, add the temporal neighboring block which is located in a collocated picture of the current block and specified by a motion vector of the spatial neighboring block to the merge candidate list,

wherein based on that the width or the height of the current block is smaller than the pre-defined minimum size, the temporal neighboring block is not included in the merge candidate list, and

wherein based on that the merge index indicates the temporal neighboring block as the candidate, the motion vectors of the each subblocks included in the current block are derived based on motion vectors of subblocks included in the temporal neighboring block.

2 . The apparatus of claim 1 , wherein the temporal neighboring block is specified by a motion vector of a first spatial neighboring block of the merge candidate list, the first spatial neighboring block being determined based on a pre-defined order among two or more spatial neighboring blocks of the current block.

3 . The apparatus of claim 1 , wherein the pre-defined minimum size is set to 8.

4 . An apparatus comprising:

a memory configured to store an image; and

a processor coupled with the memory,

wherein the processor is configured to:

generate a merge candidate list including at least one of a spatial neighboring block and a temporal neighboring block of a current block, and including candidates equal to or less than a maximum number of merge candidates, based on that a merge mode is applied to the current block;

derive motion vectors of each subblocks included in the current block based on motion vectors of a candidate included in the merge candidate list;

generate a prediction block of the current block based on the motion vectors of each subblocks;

generate a residual block of the current block based on the prediction block;

generate a merge index indicating the candidate in the merge candidate list; and

perform transform on the residual block,

wherein the processor is further configured to:

based on that a width and a height of the current block being respectively greater than or equal to a pre-defined minimum size, add the temporal neighboring block which is located in a collocated picture of the current block and specified by a motion vector of the spatial neighboring block to the merge candidate list,

wherein based on that the width or the height of the current block is smaller than the pre-defined minimum size, the temporal neighboring block is not included in the merge candidate list, and

wherein based on the motion vector of the temporal neighboring block in the merge candidate list being used for deriving the motion vectors of the each subblocks of the current block, the motion vectors of the each subblocks of the current block are derived based on motion vectors of subblocks divided from the temporal neighboring block.

5 . The apparatus of claim 4 , wherein the temporal neighboring block is specified by a motion vector of a first spatial neighboring block of the merge candidate list, the first spatial neighboring block being determined based on a pre-defined order among two or more spatial neighboring blocks of the current block.

6 . The method of claim 4 , wherein the pre-defined minimum size is set to 8.

7 . An apparatus comprising:

a processor configured to generate a bitstream for an image; and

a transmitter configured to transmit data comprising the bitstream,

wherein the processor is configured to:

generate a bitstream for the image, the bitstream is generated by generating a merge candidate list including at least one of a spatial neighboring block and a temporal neighboring block of a current block, and including candidates equal to or less than a maximum number of merge candidates, based on that a merge mode is applied to the current block; deriving motion vectors of each subblocks included in the current block based on motion vectors of a candidate included in the merge candidate list; generating a prediction block of the current block based on the motion vectors of each subblocks; generating a residual block of the current block based on the prediction block; generating a merge index indicating the candidate in the merge candidate list, and performing transform on the residual block, and

transmit data comprising the bitstream,

wherein the processor is configured to:

based on that a width and a height of the current block being respectively greater than or equal to a pre-defined minimum size, add the temporal neighboring block which is located in a collocated picture of the current block and specified by a motion vector of the spatial neighboring block to the merge candidate list,

wherein based on that the width or the height of the current block is smaller than the pre-defined minimum size, the temporal neighboring block is not included in the merge candidate list, and

wherein based on the motion vector of the temporal neighboring block in the merge candidate list being used for deriving the motion vectors of the each subblocks of the current block, the motion vectors of the each subblocks of the current block are derived based on motion vectors of subblocks divided from the temporal neighboring block.

Assignments (2)

Priority Claims (1)

Continuity (5)

References Cited (92)