公开(公告)号：US12284330B2

公开(公告)日：2025-04-22

申请号：US17860547

申请日：2022-07-08

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/46

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises constructing a merge candidate list for a current block based on a prediction mode of the current block, deriving motion information of the current block based on the merge candidate list, and generating a prediction block of the current block based on the motion information. Information on a maximum number of merge candidates included in the merge candidate list may be obtained through a sequence parameter set, and, based on the prediction mode being a subblock-based merge mode, the maximum number of merge candidates may be determined based on whether an affine mode is available for the current block.

公开(公告)号：US12231644B2

公开(公告)日：2025-02-18

申请号：US17639837

申请日：2020-09-09

Applicant: LG Electronics Inc.

Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang ,  Seung Hwan Kim

IPC: H04N19/82 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise deriving a prediction sample of a current block based on motion information of the current block, determining whether bi-directional optical flow (BDOF) applies to the current block, based on that the BDOF applies to the current block, deriving a gradient for a current subblock in the current block, deriving motion refinement (vx, vy) for the current subblock based on the gradient, deriving a BDOF offset based on the gradient and the motion refinement, and deriving a refined prediction sample for the current block based on the prediction sample of the current block and the BDOF offset.

公开(公告)号：US12120289B2

公开(公告)日：2024-10-15

申请号：US17636911

申请日：2020-08-20

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/14 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/137 ,  H04N19/14 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a prediction mode of a current block, constructing a merge candidate list for the current block, based on the prediction mode of the current block being a triangle partition mode (TPM), deriving motion information of two partitions of the current block based on the merge candidate list and two merge indices of the current block signaled through a bitstream, generating a prediction block of the current block based on the motion information, storing motion information of the current block, and updating a history-based motion vector predictor (HMVP) buffer based on the motion information of the current block.

公开(公告)号：US11949874B2

公开(公告)日：2024-04-02

申请号：US18097905

申请日：2023-01-17

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri Park ,  Seung Hwan Kim ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise deriving a prediction sample of a current block based on motion information of the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block, deriving, based on that the PROF applies to the current block, a difference motion vector for each sample position in the current block, deriving a gradient for each sample position in the current block, deriving a PROF offset based on the difference motion vector and the gradient, and deriving a refined prediction sample for the current block based on the PROF offset.

公开(公告)号：US20180278966A1

公开(公告)日：2018-09-27

申请号：US15997464

申请日：2018-06-04

Applicant: LG Electronics Inc.

Inventor： Jae Hyun LIM ,  Seung Wook Park ,  Young Joon Jeon ,  Chul Keun Kim ,  Young Hee Choi ,  Jung Sun Kim ,  Nae Ri Park ,  Hendry Hendry ,  Byeong Moon Jeon ,  Joon Young Park

IPC: H04N19/91 ,  H04N19/174 ,  H04N19/70 ,  H04N19/52 ,  H04N19/184 ,  H04N19/463 ,  H04N19/13 ,  H04N19/159 ,  H04N19/154 ,  H04N19/146 ,  H04N19/593

CPC classification number: H04N19/91 ,  H04N19/13 ,  H04N19/146 ,  H04N19/154 ,  H04N19/159 ,  H04N19/174 ,  H04N19/184 ,  H04N19/463 ,  H04N19/52 ,  H04N19/593 ,  H04N19/70

Abstract: The present invention relates to an entropy decoding method and to a decoding apparatus using same. The entropy decoding method according to the present invention comprises: a step of decoding a bin of a syntax element; and a step of acquiring information on the syntax element based on the decoded bin. In the step of decoding the bin, context-based decoding or bypass decoding is performed for each bin of the syntax element.

公开(公告)号：US12184883B2

公开(公告)日：2024-12-31

申请号：US17920126

申请日：2021-05-21

Applicant: LG Electronics Inc.

Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang ,  Jaehyun Lim ,  Seung Hwan Kim

IPC: H04N19/513 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise determining a motion vector and decoding a current block based on the motion vector. The motion vector may be determined based on at least one of a first reference picture type of a first reference picture corresponding to the current block or a second reference picture type of a second reference picture corresponding to an inter-layer corresponding block.

公开(公告)号：US12075043B2

公开(公告)日：2024-08-27

申请号：US17437349

申请日：2020-03-13

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon Jang ,  Nae Ri Park ,  Jung Hak Nam

IPC: H04N7/12 ,  H04N19/119 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/96

CPC classification number: H04N19/119 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining whether predetermined splitting is allowed for a current block based on a size of the current block, obtaining information on splitting of the current block based on whether the predetermined splitting is allowed, splitting the current block based on the information on splitting of the current block, and decoding the current block. Whether the predetermined splitting is allowed may be determined based on whether a width or height of the current block is a predetermined sample length.

公开(公告)号：US11917157B2

公开(公告)日：2024-02-27

申请号：US17970124

申请日：2022-10-20

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/513

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a prediction sample of a current block based on motion information of the current block, deriving a reference picture resampling (RPR) condition for the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block based on the RPR condition, and deriving a refined prediction sample for the current block by applying PROF to the current block.

公开(公告)号：US20230209098A1

公开(公告)日：2023-06-29

申请号：US18111156

申请日：2023-02-17

Applicant: LG ELECTRONICS INC.

Inventor： Jae Hyun Lim ,  Seung Wook Park ,  Yong Joon Jeon ,  Chul Keun Kim ,  Young Hee Choi ,  Jung Sun Kim ,  Nae Ri Park ,  Hendry Hendry ,  Byeong Moon Jeon ,  Joon Young Park

IPC: H04N19/91 ,  H04N19/146 ,  H04N19/52 ,  H04N19/174 ,  H04N19/154 ,  H04N19/159 ,  H04N19/184 ,  H04N19/13 ,  H04N19/70 ,  H04N19/593 ,  H04N19/463

CPC classification number: H04N19/91 ,  H04N19/146 ,  H04N19/52 ,  H04N19/174 ,  H04N19/154 ,  H04N19/159 ,  H04N19/184 ,  H04N19/13 ,  H04N19/70 ,  H04N19/593 ,  H04N19/463

Abstract: The present invention relates to an entropy encoding method, an entropy decoding method and to an apparatus using same. The entropy decoding method includes: a step of decoding a bin of a syntax element; and a step of acquiring information on the syntax element based on the decoded bin. In the step of decoding the bin, context-based decoding or bypass decoding is performed for each bin of the syntax element.

公开(公告)号：US11516475B2

公开(公告)日：2022-11-29

申请号：US17696619

申请日：2022-03-16

Applicant: LG ELECTRONICS INC.

Inventor： Nae Ri Park ,  Jung Hak Nam ,  Hyeong Moon Jang

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/513 ,  H04N19/105 ,  H04N19/137

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a prediction sample of a current block based on motion information of the current block, deriving a reference picture resampling (RPR) condition for the current block, determining whether prediction refinement with optical flow (PROF) applies to the current block based on the RPR condition, and deriving a refined prediction sample for the current block by applying PROF to the current block.