Granted Patent B2

US 12,732,603 · App. 18/813,221 · Granted Sep 8, 2026

Inventors: Joo Hee Moon (Seoul, KR); Dong Jae Won (Seoul, KR); Jae Min Ha (Incheon, KR)

Assignee: Industry Academy Cooperation Foundation of Sejong University

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

Abstract

Claims (30)

1 . An image decoding method, comprising:

generating a candidate list of a current block; and

performing inter prediction of the current block based on a plurality of candidates belonging to the candidate list,

wherein the plurality of candidates includes a temporal candidate in a unit of a sub-block,

wherein the temporal candidate in the unit of the sub-block is a candidate for deriving motion information for each sub-block of the current block, and has motion information of a target block which is temporally adjacent to the current block,

wherein the sub-block is an N×M block having a fixed size pre-set in an image decoding device,

wherein a sub-block of the target block is determined as a block shifted by a predetermined temporal motion vector from a position of the sub-block of the current block,

wherein the temporal motion vector is set using only a neighboring block at a specific position among spatial neighboring blocks of the current block, and

wherein the neighboring block at the specific position is a block to a left of the current block.

2 . The method of claim 1 , wherein the temporal motion vector is set only when a reference picture of the neighboring block at the specific position and a target picture to which the target block belongs are the same.

3 . An image encoding method, comprising:

generating a candidate list of a current block; and

performing inter prediction of the current block based on a plurality of candidates belonging to the candidate list,

wherein the plurality of candidates includes a temporal candidate in a unit of a sub-block,

wherein the temporal candidate in the unit of the sub-block is a candidate for deriving motion information for each sub-block of the current block, and has motion information of a target block which is temporally adjacent to the current block,

wherein the sub-block is an N×M block having a fixed size pre-set in an image encoding device,

wherein a sub-block of the target block is determined as a block shifted by a predetermined temporal motion vector from a position of the sub-block of the current block,

wherein the temporal motion vector is set using only a neighboring block at a specific position among spatial neighboring blocks of the current block, and

wherein the neighboring block at the specific position is a block to a left of the current block.

4 . The method of claim 3 , wherein the temporal motion vector is set only when a reference picture of the neighboring block at the specific position and a target picture to which the target block belongs are the same.

5 . A method of transmitting a bitstream, the method comprising:

generating a candidate list of a current block;

performing inter prediction of the current block based on a plurality of candidates belonging to the candidate list; and

transmitting the bitstream generated based on the inter prediction,

wherein the plurality of candidates includes a temporal candidate in a unit of a sub-block,

wherein the temporal candidate in the unit of the sub-block is a candidate for deriving motion information for each sub-block of the current block, and has motion information of a target block which is temporally adjacent to the current block,

wherein the sub-block is an N×M block having a fixed size pre-set in an image encoding device,

wherein a sub-block of the target block is determined as a block shifted by a predetermined temporal motion vector from a position of the sub-block of the current block,

wherein the temporal motion vector is set using only a neighboring block at a specific position among spatial neighboring blocks of the current block, and

wherein the neighboring block at the specific position is a block to a left of the current block.

Priority Claims (7)

Continuity (2)

References Cited (54)