公开(公告)号：US12267492B2

公开(公告)日：2025-04-01

申请号：US18399315

申请日：2023-12-28

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Sung Chang Lim ,  Jung Won Kang ,  Ha Hyun Lee ,  Dong San Jun ,  Hyun Suk Ko ,  Jin Ho Lee ,  Hui Yong Kim

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/186 ,  H04N19/82

Abstract: The present invention relates to a video encoding/decoding method and apparatus. The video decoding method according to the present invention may comprise decoding filter information on a coding unit; classifying samples in the coding unit into classes on a per block classification unit basis; and filtering the coding unit having the samples classified into the classes on a per block classification unit basis by using the filter information.

公开(公告)号：US12022110B2

公开(公告)日：2024-06-25

申请号：US17723725

申请日：2022-04-19

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Ha Hyun Lee ,  Jung Won Kang ,  Hyun Suk Ko ,  Sung Chang Lim ,  Jin Ho Lee ,  Dong San Jun ,  Seung Hyun Cho ,  Hui Yong Kim ,  Jin Soo Choi

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/537

CPC classification number: H04N19/521 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/537

Abstract: The present invention relates to a method for encoding and decoding an image. The method for decoding an image includes: deriving an initial motion vector from a merge candidate list of a current block; deriving a refined motion vector using the initial motion vector; and generating a prediction block of the current block using the refined motion vector.

公开(公告)号：US11943475B2

公开(公告)日：2024-03-26

申请号：US18079425

申请日：2022-12-12

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Hyun Suk Ko ,  Sung Chang Lim ,  Jung Won Kang ,  Jin Ho Lee ,  Ha Hyun Lee ,  Dong San Jun ,  Hui Yong Kim

IPC: H04N19/00 ,  H04N19/176 ,  H04N19/184 ,  H04N19/593

CPC classification number: H04N19/593 ,  H04N19/176 ,  H04N19/184

Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise configuring an MPM list based on intra-prediction modes of neighbor blocks of a current block and a number of frequencies of the intra-prediction modes of the neighbor blocks, deriving an intra-prediction mode of the current block based on the MPM list, and performing intra-prediction for the current block based on the intra-prediction mode.

公开(公告)号：US10609371B2

公开(公告)日：2020-03-31

申请号：US16019131

申请日：2018-06-26

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Sung Chang Lim ,  Hui Yong Kim ,  Se Yoon Jeong ,  Jong Ho Kim ,  Ha Hyun Lee ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim

IPC: H04N19/124 ,  H04N19/186 ,  H04N19/463 ,  H04N19/157 ,  H04N19/122 ,  H04N19/46 ,  H04N19/105 ,  H04N19/117 ,  H04N19/13 ,  H04N19/15 ,  H04N19/159 ,  H04N19/43 ,  H04N19/61 ,  H04N19/174 ,  H04N19/176

Abstract: Disclosed are a method for determining a color difference component quantization parameter and a device using the method. Method for decoding an image can comprise the steps of: decoding a color difference component quantization parameter offset on the basis of size information of a transform unit; and calculating a color difference component quantization parameter index on the basis of the decoded color difference component quantization parameter offset. Therefore, the present invention enables effective quantization by applying different color difference component quantization parameters according to the size of the transform unit when executing the quantization.

公开(公告)号：US11689728B2

公开(公告)日：2023-06-27

申请号：US17503570

申请日：2021-10-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Jin Ho Lee ,  Hui Yong Kim ,  Sung Chang Lim ,  Jin Soo Choi ,  Jin woong Kim ,  Jae Gon Kim ,  Hae Chul Choi ,  Sang Yong Lee

IPC: H04N19/157 ,  H04N19/11 ,  H04N19/176 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/157 ,  H04N19/11 ,  H04N19/176 ,  H04N19/198 ,  H04N19/593 ,  H04N19/70

Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.

公开(公告)号：US12200227B2

公开(公告)日：2025-01-14

申请号：US18080193

申请日：2022-12-13

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Dong San Jun ,  Ha Hyun Lee ,  Jung Won Kang ,  Hyun Suk Ko ,  Sung Chang Lim ,  Jin Ho Lee ,  Hui Yong Kim

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44

Abstract: The present invention relates to a video encoding/decoding method and apparatus. The video decoding method according to the present invention may comprise dividing a coding unit into a plurality of sub-units according to a block division structure and performing decoding based on the sub-unit, wherein the block division structure is a block division structure in which division is performed so as to include at least one sub-unit having a predetermined block form other than square and rectangle forms.

公开(公告)号：US12184867B2

公开(公告)日：2024-12-31

申请号：US18317685

申请日：2023-05-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Sung Chang Lim ,  Hui Yong Kim ,  Jin Ho Lee ,  Jin Soo Choi ,  Jin Woong Kim ,  Jae Gon Kim ,  Hae Chul Choi ,  Sang Yong Lee

IPC: H04N19/157 ,  H04N19/11 ,  H04N19/176 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70

Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.

公开(公告)号：US12155859B2

公开(公告)日：2024-11-26

申请号：US18346732

申请日：2023-07-03

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Ha Hyun Lee ,  Jung Won Kang ,  Hyun Suk Ko ,  Sung Chang Lim ,  Jin Ho Lee ,  Dong San Jun ,  Seung Hyun Cho ,  Hui Yong Kim ,  Jin Soo Choi

IPC: H04N19/176 ,  H04N19/105 ,  H04N19/139 ,  H04N19/513 ,  H04N19/537

Abstract: The present invention relates to a method for encoding and decoding an image. The method for decoding an image includes: deriving an initial motion vector from a merge candidate list of a current block; deriving a refined motion vector using the initial motion vector; and generating a prediction block of the current block using the refined motion vector.

公开(公告)号：US12075087B2

公开(公告)日：2024-08-27

申请号：US18103570

申请日：2023-01-31

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Sung Chang Lim ,  Jung Won Kang ,  Hyun Suk Ko ,  Dong San Jun ,  Jin Ho Lee ,  Ha Hyun Lee ,  Hui Yong Kim

IPC: H04N19/523 ,  H04N19/13 ,  H04N19/176 ,  H04N19/124

CPC classification number: H04N19/523 ,  H04N19/176 ,  H04N19/124 ,  H04N19/13

Abstract: Disclosed is an image encoding method. The method includes deriving a motion refinement candidate from among motion information of spatial neighboring blocks, motion information of a temporal neighboring blocks, predefined motion information, and motion information that most frequently occurs in a reference picture, performing a motion information refinement on the derived motion refinement candidate, and generating a prediction block of a current block by using the motion refinement candidate having undergone the motion information refinement.

公开(公告)号：US12047563B2

公开(公告)日：2024-07-23

申请号：US17941182

申请日：2022-09-09

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Dong San Jun ,  Ha Hyun Lee ,  Jung Won Kang ,  Hyun Suk Ko ,  Sung Chang Lim ,  Jin Ho Lee ,  Seung Hyun Cho ,  Hui Yong Kim ,  Jin Soo Choi

IPC: H04N19/176 ,  H04N19/109 ,  H04N19/117 ,  H04N19/119 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/182 ,  H04N19/513 ,  H04N19/86 ,  H04N19/91

CPC classification number: H04N19/109 ,  H04N19/117 ,  H04N19/119 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/182 ,  H04N19/513 ,  H04N19/86 ,  H04N19/91

Abstract: An image encoding method and an image decoding method are provided. The image decoding method includes deriving a temporal merge candidate from a co-located block of a current block, generating a merge candidate list of the current block based on the derived temporal merge candidate, and generating a prediction block of the current block based on the generated merge candidate list. The deriving a temporal merge candidate includes scaling a motion vector derived from the co-located block based on a POC difference value between the current block and a reference picture of the current block and a POC difference value between the co-located block and a reference picture of the co-located block, and modifying the scaled motion vector based on motion vector scaling information between a neighboring block of the current block and a co-located block of the neighboring block.