公开(公告)号：US20190273926A1

公开(公告)日：2019-09-05

申请号：US16336830

申请日：2017-08-31

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Hyeongmoon JANG

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176 ,  H04N19/91

Abstract: The intra prediction method according to the present invention comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring reference samples of the current block; and generating a prediction sample of the current block on the basis of linear interpolation of a first neighboring reference sample positioned in the prediction direction of the intra prediction mode, and a second neighboring reference sample positioned in the opposite direction of the prediction direction, among the neighboring reference samples of the current block, wherein the neighboring reference samples include left neighboring reference samples, left upper neighboring reference samples, upper neighboring reference samples, right neighboring reference samples, right lower neighboring reference samples, and lower neighboring reference samples of the current block. The present invention can improve intra prediction performance, and thereby reduce the amount of data required for residual information and increase the overall coding efficiency.

公开(公告)号：US20190238863A1

公开(公告)日：2019-08-01

申请号：US16338583

申请日：2017-08-14

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Hyeongmoon JANG ,  Jin HEO

IPC: H04N19/176 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: The present invention provides a method for decoding a chroma block of a video signal, comprising the steps of: inducing division information of a luma block, wherein the division information of the luma block includes split depth information of the luma block; parsing depth inheritance information of the chroma block from a video signal, wherein the depth inheritance information indicates the degree of use of the split depth information of the luma block; inducing division information of the chroma block on the basis of the split depth information of the luma block and/or the depth inheritance information, wherein the division information of the chroma block includes split depth information of the chroma block; and decoding the chroma block on the basis of the division information of the chroma block.

公开(公告)号：US20190200016A1

公开(公告)日：2019-06-27

申请号：US16327192

申请日：2017-08-21

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Junghak NAM

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/86 ,  H04N19/14

CPC classification number: H04N19/117 ,  H04N19/119 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/86

Abstract: The present invention discloses an image coding/decoding method and an apparatus for the method. More specifically, a method for filtering an image by a decoding apparatus comprises deriving boundaries of a block divided into quad-tree plus binary-tree structure; determining an edge among boundaries of the block to which de-blocking filtering is applied; determining a type of de-blocking filtering to be applied to the edge; and performing de-blocking filtering to a picture sample restored according to the de-blocking filtering type, wherein the edge or the type of de-blocking filtering is determined by considering width or height of the block.

公开(公告)号：US20180343455A1

公开(公告)日：2018-11-29

申请号：US15775307

申请日：2016-11-11

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Bumshik LEE ,  Sehoon YEA

IPC: H04N19/18 ,  H04N19/159 ,  H04N19/176 ,  H04N19/124 ,  H04N19/44

Abstract: An intra prediction method according to the present invention comprises the steps of: determining an intra prediction mode for a current block; determining whether to apply a coefficient induced intra prediction (CIIP) to the current block; deriving neighboring reference samples for the current block on the basis of whether the CIIP is applied; and generating prediction samples for the current block on the basis of the intra prediction mode and the neighboring samples. The present invention can generate modified or improved neighboring reference samples and thereby can improve the performance of intra prediction.

公开(公告)号：US20180278940A1

公开(公告)日：2018-09-27

申请号：US15762323

申请日：2016-09-23

Applicant: LG Electronics Inc.

Inventor： Seungwook PARK ,  Hyeongmoon JANG ,  Yongjoon JEON

IPC: H04N19/159 ,  H04N19/136 ,  H04N19/109 ,  H04N19/172 ,  H04N19/176

CPC classification number: H04N19/159 ,  H04N19/109 ,  H04N19/136 ,  H04N19/172 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/52 ,  H04N19/523 ,  H04N19/59

Abstract: The present invention provides an image encoding/decoding method and a device for same. In particular, the image decoding method may comprise the steps of: determining if the properties of a current picture and a reference picture differ; converting the reference picture to have the same properties as the current picture when the properties of the current picture and reference picture differ; and performing inter-prediction on the current picture by predetermined block unit by means of the converted reference picture.

公开(公告)号：US20180220149A1

公开(公告)日：2018-08-02

申请号：US15750093

申请日：2016-07-15

Applicant: LG Electronics Inc.

Inventor： Eunyong SON ,  Moonmo KOO ,  Hyeongmoon JANG ,  Seungwook PARK ,  Yongjoon JEON

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/159 ,  H04N19/44

Abstract: A video decoding method performed by a decoding device includes: deriving control points (CPs) for a current block; acquiring motion vectors for the CPs; deriving a sample-unit motion vector in the current block based on the acquired motion vectors; deriving a prediction sample for the current block based on the sample-unit motion vector; and generating a restoration sample based on the prediction sample, wherein coordinates of a bottom-right sample position of the current block are (0, 0), and coordinates of CP0 among the CPs are (0, 0). Inter prediction is effectively performed through sample-unit motion vectors even when an image in a current block is planarly moved and variously changed, and since motion vectors for CPs are derived based on already-decoded neighboring blocks, an amount of information for the motion vectors for the CPs and for a residual signal for the current block is reduced, improving overall coding efficiency.

公开(公告)号：US20250088638A1

公开(公告)日：2025-03-13

申请号：US18956744

申请日：2024-11-22

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

Abstract: A video decoding method comprises: deriving L0 and L1 motion vectors of a current block; deriving decoder-side motion vector refinement (DMVR) flag information indicating whether to apply a DMVR to the current block; when the DMVR flag information indicates that the DMVR is to be applied to the current block, deriving refined L0 and L1 motion vectors based on the L0 and L1 motion vectors by applying the DMVR to the current block; deriving prediction samples of the current block based on the refined L0 and L1 motion vectors; and generating reconstructed samples of the current block based on the predicted samples, wherein deriving DMVR flag information comprises deriving the DMVR flag information by applying the DMVR to the current block when the height of the current block is 8 or more, and when the values of L0 and L1 luma weighted prediction flag information are both 0.

公开(公告)号：US20250071282A1

公开(公告)日：2025-02-27

申请号：US18725528

申请日：2022-12-29

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

Abstract: An image decoding/encoding method and device according to the present disclosure enable: an intra prediction mode of the current block to be determined on the basis of whether the intra prediction mode of the current block is derived on the basis of a cost of a template area adjacent to the current block; a reference sample of the current block to be determined; and a prediction sample of the current block to be generated on the basis of the intra prediction mode and the reference sample.

公开(公告)号：US20250063180A1

公开(公告)日：2025-02-20

申请号：US18724653

申请日：2022-12-30

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Hyeongmoon JANG ,  Junghak NAM ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

Abstract: According to the present disclosure, an image decoding method performed by a decoding device includes the steps of acquiring image information including prediction-related information from a bitstream; deriving an intra prediction mode with respect to a current block on the basis of the prediction-related information; generating prediction samples with respect to the current block on the basis of the intra prediction mode with respect to the current block; and generating reconstruction samples with respect to the current block on the basis of the prediction samples with respect to the current block, wherein the intra prediction mode is derived on the basis of whether an upper neighboring block of the current block exists in the same coding tree unit (CTU) as the current block.

公开(公告)号：US20250039432A1

公开(公告)日：2025-01-30

申请号：US18716867

申请日：2022-12-05

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

IPC: H04N19/52 ,  H04N19/117 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/184

Abstract: An image decoding/encoding method and device according to the present disclosure may: acquire a first flag indicating whether an intra derivation mode is applied to a current block; acquire a second flag indicating whether BDPCM is applied to a chroma component of the current block, on the basis of the first flag; derive an intra prediction mode of the chroma component on the basis of the second flag; and generate a prediction sample of the chroma component on the basis of the intra prediction mode.