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.

公开(公告)号：US12003713B2

公开(公告)日：2024-06-04

申请号：US17714009

申请日：2022-04-05

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Jin Ho Lee ,  Jung Won Kang ,  Ha Hyun Lee ,  Sung Chang Lim ,  Hui Yong Kim

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/82

Abstract: There is provided an image encoding/decoding method and apparatus. The image encoding method of the present invention includes: determining whether or not to apply filtering to a filtering target sample; determining a filter type on the basis of the determination; and applying filtering to the filtering target sample by using the determined filter type.

公开(公告)号：US11909961B2

公开(公告)日：2024-02-20

申请号：US16766611

申请日：2018-11-22

Applicant: Intellectual Discovery Co., Ltd.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/50 ,  H04N19/593 ,  H04N19/70 ,  H04N19/80

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/50 ,  H04N19/593 ,  H04N19/70 ,  H04N19/80

Abstract: In performing image encoding/decoding, decoding of an image is performed by deriving an intra prediction mode for a current block, decoding at least one original sample that is present in a rightmost column and a bottommost row (a bottom row) of the current block, constructing a reference sample by using the at least one decoded original sample and performing intra prediction on the current block by using the constructed reference sample.

公开(公告)号：US11051019B2

公开(公告)日：2021-06-29

申请号：US16794054

申请日：2020-02-18

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：US12155843B2

公开(公告)日：2024-11-26

申请号：US18358844

申请日：2023-07-25

Applicant: Intellectual Discovery Co., Ltd.

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

IPC: H04N19/00 ,  H04N19/11 ,  H04N19/159 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus for performing template matching-based intra prediction are provided. An image decoding method may comprise deriving a first intra-prediction mode for a current block, generating a first intra-prediction block corresponding to the first intra-prediction mode, deriving a second intra-prediction mode for the current block, generating a second intra-prediction block corresponding to the second intra-prediction mode, and generating a final intra-prediction block by using a weighted sum of the first intra-prediction block and the second intra-prediction block.