公开(公告)号：US20190230364A1

公开(公告)日：2019-07-25

申请号：US16336397

申请日：2017-09-28

Applicant: LG ELECTRONICS INC.

Inventor： Jaeho LEE ,  Hyeongmoon JANG

IPC: H04N19/159 ,  H04N19/119 ,  H04N19/96 ,  H04N19/176 ,  H04N19/70

Abstract: The present invention provides a method for performing bidirectional prediction on a current block by using a weight index, the method comprising the steps of: determining whether the number of pixels of the current block is less than or equal to a threshold number of pixels; determining a weight index or a weight value of the current block on the basis of a weight index of a neighboring block if the number of pixels of the current block is less than or equal to the threshold number of pixels; obtaining a bidirectional predicted value for the current block on the basis of the weight index or the weight value of the current block; and restoring the current block by using the bidirectional predicted value, wherein the threshold number of pixels indicates a maximum number of pixels within a block necessary to share a weight index between blocks.

公开(公告)号：US20190230352A1

公开(公告)日：2019-07-25

申请号：US16337802

申请日：2017-08-30

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Hyeongmoon JANG ,  Sunmi YOO

IPC: H04N19/11 ,  H04N19/593 ,  H04N19/186 ,  H04N19/176 ,  H04N19/159 ,  H04N19/513

Abstract: The image decoding method performed by a decoding apparatus, according to the present invention, comprises the steps of: receiving intra prediction mode information of a current chroma block; deriving intra prediction candidate modes of the current chroma block on the basis of a neighboring chroma block of the current chroma block; deriving an intra prediction mode of the current chroma block on the basis of the intra prediction mode information and the intra prediction candidate modes; and predict the current chroma block on the basis of the intra prediction mode, wherein the intra prediction candidate modes include an intra prediction mode applied to a neighboring chroma block of the current chroma block.

公开(公告)号：US20190174128A1

公开(公告)日：2019-06-06

申请号：US16324452

申请日：2017-02-07

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Jaehyun LIM ,  Jin HEO

IPC: H04N19/11 ,  H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176

Abstract: Disclosed are an intra-prediction mode-based image processing method and a device therefor. Particularly, a method for processing an image on the basis of an intra-prediction mode may comprise the steps of: configuring a reference sample to be used for prediction of a current block on the basis of width information and height information of the current block when the current block is a non-square block; deriving an intra-prediction mode of the current block; and generating a prediction sample of the current block by using the reference sample on the basis of the intra-prediction mode of the current block.

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.

公开(公告)号：US20250016325A1

公开(公告)日：2025-01-09

申请号：US18711233

申请日：2022-11-18

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Jaehyun LIM ,  Hyeongmoon JANG

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

Abstract: An image encoding/decoding method and device according to the present disclosure can: construct a candidate list of the current block, the candidate list comprising a plurality of candidates and the plurality of candidates including HMVP candidates; deriving motion information about the current block on the basis of the candidate list; and perform inter prediction for the current block on the basis of the motion information.

公开(公告)号：US20240357154A1

公开(公告)日：2024-10-24

申请号：US18633276

申请日：2024-04-11

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573 ,  H04N19/70

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/573 ,  H04N19/70

Abstract: According to embodiments according to the present document, merge mode motion vector differences (MMVD) and symmetric motion vector differences (SMVD) may be performed on the basis of reference picture types and, in particular, short-term reference pictures may be used. Accordingly, prediction performance and coding efficiency in an inter prediction mode may be increased.

公开(公告)号：US20240348789A1

公开(公告)日：2024-10-17

申请号：US18753007

申请日：2024-06-25

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Seunghwan KIM

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

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: A decoding method performed by a decoding device according to the present document comprises the steps of determining a prediction mode of a current block on the basis of information about a prediction mode obtained from a bitstream; constructing a merge candidate list on the basis of the prediction mode; deriving motion information of the current block on the basis of the merge candidate list; and generating prediction samples of the current block on the basis of the motion information, wherein the bitstream includes information about a combined inter-picture merge and intra-picture prediction (CIIP) available flag indicating whether the CIIP is available, and the determination step may include a step of acquiring a regular merge flag from the bitstream on the basis of the CIIP available flag.

公开(公告)号：US20240275947A1

公开(公告)日：2024-08-15

申请号：US18616984

申请日：2024-03-26

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

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

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: According to the disclosure of the present document, when the inter-prediction type of the current block indicates biprediction, weight index information for a candidate in a merge candidate list or sub-block merge candidate list can be derived, and coding efficiency can be raised.