公开(公告)号：US12143600B2

公开(公告)日：2024-11-12

申请号：US18469838

申请日：2023-09-19

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Yong Jo Ahn ,  Ho Chan Ryu

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

Abstract: The present invention provides an image encoding method and an image decoding method. The image decoding method of the present invention may comprise: obtaining intra-frame prediction information of a current block from a bitstream; inducing an intra-frame prediction mode of the current block on the basis of the intra-frame prediction information; determining a reference region for intra-frame prediction of the current block; and performing intra-frame prediction of the current block on the basis of the intra-frame prediction mode and the reference region.

公开(公告)号：US12108053B2

公开(公告)日：2024-10-01

申请号：US18462673

申请日：2023-09-07

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Yong Jo Ahn ,  Ho Chan Ryu

IPC: H04N19/159 ,  H04N19/119 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/159 ,  H04N19/119 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: The present invention relates to an intra prediction scheme among video coding techniques and, more particularly, relates to a video decoding method and apparatus for diving a block into a plurality of sub-blocks when intra prediction is performed and sequentially performing infra prediction on each of the sub-blocks. The decoding method performed by a video decoding apparatus includes determining whether to perform sub-block-based intra prediction on a current coding unit, dividing the current coding unit into a plurality of sub-blocks, performing intra prediction on each of the sub-blocks when a result of determination of whether to perform sub-block-based intra prediction has a value of “true”, and directly performing block-based intra prediction on the current coding unit without dividing the current coding unit when the result of the determination has a value of “false”.

公开(公告)号：US11973960B2

公开(公告)日：2024-04-30

申请号：US17836236

申请日：2022-06-09

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Yong Jo Ahn ,  Dong Gyu Sim ,  Ho Chan Ryu ,  Seanae Park ,  Byung Tae Oh ,  Byung Cheol Song

IPC: H04N19/105 ,  H04N19/129 ,  H04N19/13 ,  H04N19/157 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/513 ,  H04N19/523 ,  H04N19/593 ,  H04N19/82 ,  H04N19/91

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/129 ,  H04N19/13 ,  H04N19/157 ,  H04N19/176 ,  H04N19/18 ,  H04N19/513 ,  H04N19/523 ,  H04N19/593 ,  H04N19/82 ,  H04N19/91

Abstract: A video encoding/decoding apparatus according to the present invention acquires motion vector refinement information, performs motion compensation on the basis of a motion vector of a current block, refines the motion vector of the current block using at least one or both of the motion vector refinement information and the output of the motion compensation, and performs motion compensation using the refined motion vector.

公开(公告)号：US20230421777A1

公开(公告)日：2023-12-28

申请号：US18462673

申请日：2023-09-07

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Yong Jo AHN ,  Ho Chan Ryu

IPC: H04N19/159 ,  H04N19/119 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/159 ,  H04N19/119 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: The present invention relates to an intra prediction scheme among video coding techniques and, more particularly, relates to a video decoding method and apparatus for diving a block into a plurality of sub-blocks when intra prediction is performed and sequentially performing infra prediction on each of the sub-blocks. The decoding method performed by a video decoding apparatus includes determining whether to perform sub-block-based intra prediction on a current coding unit, dividing the current coding unit into a plurality of sub-blocks, performing intra prediction on each of the sub-blocks when a result of determination of whether to perform sub-block-based intra prediction has a value of “true”, and directly performing block-based intra prediction on the current coding unit without dividing the current coding unit when the result of the determination has a value of “false”.

公开(公告)号：US11812033B2

公开(公告)日：2023-11-07

申请号：US17471467

申请日：2021-09-10

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Yong Jo Ahn ,  Ho Chan Ryu

IPC: H04N19/00 ,  H04N19/159 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176

Abstract: The present invention provides an image encoding method and an image decoding method. The image decoding method of the present invention may comprise: obtaining intra-frame prediction information of a current block from a bitstream; inducing an intra-frame prediction mode of the current block on the basis of the intra-frame prediction information; determining a reference region for intra-frame prediction of the current block; and performing intra-frame prediction of the current block on the basis of the intra-frame prediction mode and the reference region.

公开(公告)号：US11659200B2

公开(公告)日：2023-05-23

申请号：US17345118

申请日：2021-06-11

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Yong Jo Ahn ,  Ho Chan Ryu

IPC: H04N19/577 ,  H04N19/593 ,  H04N19/124 ,  H04N19/61 ,  H04N19/82 ,  H04N19/91 ,  H04N19/96

CPC classification number: H04N19/577 ,  H04N19/593 ,  H04N19/124 ,  H04N19/619 ,  H04N19/82 ,  H04N19/91 ,  H04N19/96

Abstract: The present invention relates to block merging according to block split among video coding techniques, and a method and an apparatus for coding and decoding a video, in which in generating and modifying a block merging list, spatial merging candidate blocks of the block merging list are changed according to a split type and order of a current coding unit.

公开(公告)号：US11356692B2

公开(公告)日：2022-06-07

申请号：US16978025

申请日：2019-03-19

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Yong Jo Ahn ,  Ho Chan Ryu

IPC: H04N19/51 ,  H04N19/105 ,  H04N19/176

Abstract: The present invention provides an image encoding method and an image decoding method. An image decoding method according to the present invention, for decoding an image by decoder-side motion information derivation, comprises the steps of: checking, from among a plurality of motion information derivation types, the motion information derivation type applied to the current block: and deriving motion information of the current block according to the checked motion information derivation type, wherein different motion information compensation techniques are applicable according to the motion information derivation type.

公开(公告)号：US20220021895A1

公开(公告)日：2022-01-20

申请号：US17491955

申请日：2021-10-01

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Yong Jo Ahn ,  Ho Chan Ryu

IPC: H04N19/44 ,  H04N19/136 ,  H04N19/184 ,  H04N19/60

Abstract: The present invention relates to a method and a device for decoding an image, which improve encoding and decoding efficiency by performing various forms of transform and inverse transform during transform and inverse transform processes of a video coding technique.

公开(公告)号：US20220014789A1

公开(公告)日：2022-01-13

申请号：US17484731

申请日：2021-09-24

Applicant: Intellectual Discovery Co., Ltd.

Inventor： Ho Chan Ryu ,  Yong Jo Ahn

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/119 ,  H04N19/88 ,  H04N19/46 ,  H04N19/44 ,  H04N19/134 ,  H04N19/169 ,  H04N19/96

Abstract: A decoding method comprises the steps of: combining two or more encoding units of maximum size into a single encoding unit group; acquiring encoding data corresponding to the combined single encoding unit group; and decoding, according to a decoding order, the two or more encoding units of maximum size contained in the single encoding unit group. Also disclosed is a block partitioning structure used for encoding and decoding video.

公开(公告)号：US10904525B2

公开(公告)日：2021-01-26

申请号：US16378492

申请日：2019-04-08

Applicant: INTELLECTUAL DISCOVERY CO., LTD.

Inventor： Ho Chan Ryu ,  Yong Jo Ahn

IPC: H04N19/119 ,  H04N19/44 ,  H04N19/186 ,  H04N19/513 ,  H04N19/593 ,  H04N19/176 ,  H04N19/70 ,  H04N19/157

Abstract: The present invention relates to a block partitioning structure from among the video coding schemes and to a method and apparatus for encoding and decoding the block partitioning structure, the method comprising the steps of: acquiring block partitioning data; partitioning a block by means of the acquired block partitioning data; and encoding and decoding by means of the partitioned block. The encoding and decoding method and apparatus according to the present invention has the benefit of improving encoding efficiency with respect to the existing video compression schemes.