Granted Patent B2

US 12,200,227 · App. 18/080,193 · Granted Jan 14, 2025

Inventors: Dong San Jun (Daejeon, KR); Ha Hyun Lee (Seoul, KR); Jung Won Kang (Daejeon, KR); Hyun Suk Ko (Daejeon, KR); Sung Chang Lim (Daejeon, KR); Jin Ho Lee (Daejeon, KR); Hui Yong Kim (Daejeon, KR)

Assignee: Intellectual Discovery Co., Ltd.

H04N19/176H04N19/119H04N19/159H04N19/44

Abstract

Claims (24)

1. A method of decoding an image, the method comprising:

determining a merge list of a current block for a merge mode;

determining a first initial motion vector and a second initial motion vector of the current block based on the merge list of the current block;

obtaining, based on a minimum SAD (Sum of Absolute Difference) between a first block in a L0 reference picture and a second block in a L1 reference picture, a first refined motion vector and a second refined motion vector of the current block by refining the first initial motion vector and the second initial motion vector; and

predicting the current block based on the first refined motion vector and the second refined motion vector,

wherein the first block and the second block is determined based on the first initial motion vector and the second initial motion vector.

2. The method of claim 1 , wherein the first initial motion vector and the second initial motion vector are respectively determined for the L0 reference picture and the L1 reference picture.

3. The method of claim 2 , wherein a prediction direction of the L0 reference picture is opposite to a prediction direction of the L1 reference picture.

4. The method of claim 1 , wherein the current block is predicted in unit of a sub-block.

5. A method of encoding an image, the method comprising:

determining a merge list of a current block for a merge mode;

determining a first initial motion vector and a second initial motion vector of the current block based on the merge list of the current block;

obtaining, based on a minimum SAD (Sum of Absolute Difference) between a first block in a L0 reference picture and a second block in a L1 reference picture, a first refined motion vector and a second refined motion vector of the current block by refining the first initial motion vector and the second initial motion vector; and

predicting the current block based on the first refined motion vector and the second refined motion vector,

wherein the first block and the second block is determined based on the first initial motion vector and the second initial motion vector.

6. The method of claim 5 , wherein the first initial motion vector and the second initial motion vector are respectively determined for the L0 reference picture and the L1 reference picture.

7. The method of claim 6 , wherein a prediction direction of the L0 reference picture is opposite to a prediction direction of the L1 reference picture.

8. The method of claim 5 , wherein the current block is predicted in unit of a sub-block.

9. A non-transitory computer readable recording medium storing a bitstream generated by an encoding method, the method comprising:

determining a merge list of a current block for a merge mode;

determining a first initial motion vector and a second initial motion vector of the current block based on the merge list of the current block;

obtaining, based on a minimum SAD (Sum of Absolute Difference) between a first block in a L0 reference picture and a second block in a L1 reference picture, a first refined motion vector and a second refined motion vector of the current block by refining the first initial motion vector and the second initial motion vector; and

predicting the current block based on the first refined motion vector and the second refined motion vector,

wherein the first block and the second block is determined based on the first initial motion vector and the second initial motion vector.

Assignments (2)

Priority Claims (1)

Continuity (2)

References Cited (46)