公开(公告)号：US20190320170A1

公开(公告)日：2019-10-17

申请号：US16341002

申请日：2017-09-29

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM

IPC: H04N19/117 ,  H04N19/182 ,  H04N19/70

Abstract: Disclosed in the present invention are an image processing method and an apparatus therefor. Specifically, the image processing method can comprise the steps of: extracting encoded image data from a bitstream received from an encoder; decoding the encoded image data so as to generate a reconstructed image; determining a category of a current pixel by comparing a pixel value of the current pixel in the reconstructed image with pixel values of neighboring pixels of the current pixel; generating an offset applied to the current pixel on the basis of a difference value between pixel values of pixels, determined according to the category, among the neighboring pixels and the pixel value of the current pixel; and compensating for the current pixel by adding the offset to the pixel value of the current pixel.

公开(公告)号：US20190222839A1

公开(公告)日：2019-07-18

申请号：US16337125

申请日：2017-09-25

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Jin HEO

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/105 ,  H04N19/593

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593

Abstract: A method and a device for processing an intra prediction mode based video are disclosed. More specifically, a method for processing a video based on an intra-prediction mode may include determining a left prediction mode and an upper prediction mode using a prediction mode of a block neighboring a current block, wherein the left prediction mode and the upper prediction mode are determined based on a split structure of the block neighboring the current block; constructing a most probable mode (MPM) candidate list of the current block using the left prediction mode and the upper prediction mode; determining a prediction mode of the current block using a MPM index indicating a specific prediction mode in the MPM candidate list; and generating a prediction block of the current block using the prediction mode of the current block.

公开(公告)号：US20190208209A1

公开(公告)日：2019-07-04

申请号：US16330329

申请日：2017-09-05

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Jaehyun LIM

IPC: H04N19/132 ,  H04N19/593 ,  H04N19/117 ,  H04N19/176 ,  H04N19/96 ,  H04N19/44

CPC classification number: H04N19/132 ,  H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/44 ,  H04N19/593 ,  H04N19/96

Abstract: Disclosed are an image coding/decoding method and an apparatus therefor. Specifically, a method for decoding an image by a decoding apparatus may include: deriving an intra prediction mode of a current block; configuring reference samples with samples neighboring to an upper end and samples neighboring to a left side of the current block; generating a prediction block of the current block by using the reference sample; and filtering a sample adjacent to a top boundary and/or a left boundary of the current block among the prediction samples, in which when the current block is a non-square block, whether to filter the sample adjacent to the top boundary of the current block may be determined by considering only a width of the current block and whether to filter the sample adjacent to the left boundary of the current block may be determined by considering only a height of the current block.

公开(公告)号：US20180270485A1

公开(公告)日：2018-09-20

申请号：US15761356

申请日：2016-03-03

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Jaehyun LIM ,  Seungwook PARK ,  Sehoon YEA

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/51

Abstract: An image encoding method according to the present invention, which is performed by an encoding apparatus, comprises the steps of: generating an adaptive motion vector range (AMVR) enable flag; deriving a motion vector difference (MVD) with respect to a current block; deriving a representative MVD value of an MVD range including a value of the MVD from among a plurality of MVD ranges; generating a coded MVD corresponding to the representative MVD value; and outputting the AMVR enable flag and the coded MVD through a bit stream. According to the present invention, the amount of bits allocated to an MVD can be reduced and the overall coding efficiency can thus be increased.

公开(公告)号：US20180234697A1

公开(公告)日：2018-08-16

申请号：US15751077

申请日：2016-07-15

Applicant: LG Electronics Inc.

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

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/513 ,  H04N19/66

CPC classification number: H04N19/56 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/182 ,  H04N19/503 ,  H04N19/513 ,  H04N19/66 ,  H04N19/70 ,  H04N19/91

Abstract: A video decoding method performed by a decoding apparatus includes the steps of: deriving control points (CP) for a current block; acquiring movement vectors for the CPs; deriving a sample unit movement vector in the current block on the basis of the acquired movement vectors; and deriving a prediction sample for the current block on the basis of the sample unit movement vector. According to the present invention, it is possible to effectively perform, through sample unit motion vectors, inter-prediction not only in a case where an image in the current block is plane-shifted but also in a case where there are various image distortions.

公开(公告)号：US20250150583A1

公开(公告)日：2025-05-08

申请号：US18730094

申请日：2023-02-08

Applicant: LG Electronics Inc.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176

Abstract: An image decoding/encoding method and apparatus, according to the present disclosure, may comprise: deriving an intra-prediction mode of a current block on the basis of a gradient between at least two samples in a peripheral region adjacent to the current block; configuring a reference sample of the current block; and generating a prediction block of the current block on the basis of the intra-prediction mode and the reference sample.

公开(公告)号：US20250150579A1

公开(公告)日：2025-05-08

申请号：US19016839

申请日：2025-01-10

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Junghak NAM

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

Abstract: According to the disclosure of this document, in subblock-based temporal motion vector prediction (sbTMVP), a subblock position for deriving a motion vector in units of a subblock can be efficiently calculated, and through this, video/image coding efficiency can be improved and hardware implementation can be simplified.

公开(公告)号：US20250126267A1

公开(公告)日：2025-04-17

申请号：US18984222

申请日：2024-12-17

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186

Abstract: A method for image decoding, according to the present document, may comprise the steps of: deriving an intra prediction mode of a chroma block as a cross-component linear model (CCLM) mode; updating the intra prediction mode of the chroma block on the basis of an intra prediction mode of a luma block corresponding to the chroma block; and determining an LFNST set including LFNST matrices on the basis of the updated intra prediction mode, wherein the updated intra prediction mode is derived as an intra prediction mode corresponding to a specific position in the luma block, and the specific position is set on the basis of a color format of the chroma block.

公开(公告)号：US20250113023A1

公开(公告)日：2025-04-03

申请号：US18708436

申请日：2022-11-18

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

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.

公开(公告)号：US20250039403A1

公开(公告)日：2025-01-30

申请号：US18690654

申请日：2022-09-27

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG

IPC: H04N19/159 ,  H04N19/119 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A method by which a decoding device decodes an image, according to the disclosure of the present document, comprises the steps of: acquiring, from a bitstream, information related to a geometric partitioning mode (GPM) for the current block; deriving partitions of the current block on the basis of partition index information within the information related to the GPM, wherein the partitions include a first geometric partition and a second geometric partition; deriving first prediction samples for the first geometric partition; deriving second prediction samples for the second geometric partition; generating prediction samples for the current block on the basis of the first prediction samples and the second prediction samples; and generating reconstructed samples on the basis of the prediction samples for the current block.