Granted Patent B2

US 12,739,404 · App. 18/991,072 · Granted Sep 15, 2026

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); Seung Hyun Cho (Daejeon, KR); Hui Yong Kim (Daejeon, KR); Jin Soo Choi (Daejeon, KR)

Assignee: LX Semicon Co., Ltd.

H04N19/159H04N19/105H04N19/126H04N19/13H04N19/176H04N19/463H04N19/513H04N19/593H04N19/96

Abstract

Claims (44)

1 . An image decoding method performed by a decoding apparatus, the method comprising:

obtaining image information comprising information related to motion compensation from a bitstream;

deriving merge candidates of a current block;

generating a merge candidate list of the current block based on the derived merge candidates;

determining motion information of the current block based on the merge candidate list; and

generating a predicted block of the current block based on the motion information of the current block,

wherein the information related to the motion compensation includes motion vector resolution information,

wherein the motion vector resolution information indicates a specific motion vector resolution among motion vector resolution candidates including an integer pel resolution, a ¼ pel resolution and a 1/16 pel resolution,

wherein the merge candidates include motion vectors of neighboring blocks of the current block,

wherein the motion vector resolution information is signaled at a coding unit level,

wherein the motion vector resolution information is entropy decoded based on a context model, and

wherein the motion vector resolution information is based on a truncated unary binarization.

2 . The method of claim 1 , wherein the context model is determined based on information on a size of the current block.

3 . The method of claim 1 , wherein the context model is determined based on information related to motion compensation of a neighboring block of the current block.

4 . The method of claim 1 , wherein the context model is determined based on information related to a prediction mode of the current block.

5 . An image encoding method performed by an encoding apparatus, the method comprising:

deriving merge candidates of a current block;

generating a merge candidate list of the current block based on the derived merge candidates;

determining motion information of the current block based on the merge candidate list;

generating a predicted block of the current block based on the motion information of the current block;

generating information related to motion compensation; and

encoding image information including the information related to the motion compensation,

wherein the information related to the motion compensation includes motion vector resolution information,

wherein the motion vector resolution information indicates a specific motion vector resolution among motion vector resolution candidates including an integer pel resolution, a ¼ pel resolution and a 1/16 pel resolution,

wherein the merge candidates include motion vectors of neighboring blocks of the current block,

wherein the motion vector resolution information indicates the specific motion vector resolution related to a motion vector,

wherein the motion vector resolution information is signaled at a coding unit level,

wherein the motion vector resolution information is entropy encoded based on a context model, and

wherein the motion vector resolution information is based on a truncated unary binarization.

6 . The method of claim 5 , wherein the context model is determined based on information on a size of the current block.

7 . The method of claim 5 , wherein the context model is determined based on information related to motion compensation of a neighboring block of the current block.

8 . The method of claim 5 , wherein the context model is determined based on information related to a prediction mode of the current block.

9 . A transmission method for image data, the method comprising:

obtaining a bitstream of encoded image information, wherein the encoded image information is generated based on deriving merge candidates of a current block, generating a merge candidate list of the current block based on the derived merge candidates, determining motion information of the current block based on the merge candidate list, generating a predicted block of the current block based on the motion information of the current block, generating information related to motion compensation, and encoding image information including the information related to the motion compensation; and

transmitting the image data comprising the bitstream,

wherein the information related to the motion compensation includes motion vector resolution information,

wherein the motion vector resolution information indicates a specific motion vector resolution among motion vector resolution candidates including an integer pel resolution, a ¼ pel resolution and a 1/16 pel resolution,

wherein the merge candidates include motion vectors of neighboring blocks of the current block,

wherein the motion vector resolution information is signaled at a coding unit level,

wherein the motion vector resolution information is entropy encoded based on a context model, and

wherein the motion vector resolution information is based on a truncated unary binarization.

10 . The method of claim 9 , wherein the context model is determined based on information on a size of the current block.

11 . The method of claim 9 , wherein the context model is determined based on information related to motion compensation of a neighboring block of the current block.

12 . The method of claim 9 , wherein the context model is determined based on information related to a prediction mode of the current block.

Priority Claims (2)

Continuity (4)

References Cited (110)