公开(公告)号：US20190306511A1

公开(公告)日：2019-10-03

申请号：US16306837

申请日：2016-06-03

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Bumshik LEE

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/105 ,  H04N19/46 ,  H04N19/124 ,  H04N19/33 ,  H04N19/176

Abstract: An intra-prediction method according to the present invention comprises the steps of: obtaining information on an intra-prediction mode from a bitstream; determining an intra-prediction mode for a current block on the basis of the information on the intra-prediction mode; determining whether to apply coefficient induced intra-prediction (CIIP) to the current block; deriving neighboring samples of the current block on the basis of the determination of whether to apply the CIIP; and generating predicted samples of the current block on the basis of the intra-prediction mode and the neighboring samples. According to the present invention, corrected or improved neighboring samples can be generated, whereby intra-prediction performance can be improved.

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：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.

公开(公告)号：US20240414367A1

公开(公告)日：2024-12-12

申请号：US18813792

申请日：2024-08-23

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri PARK ,  Seunghwan KIM

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/109 ,  H04N19/119 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/70

Abstract: The present disclosure relates to an image decoding and encoding method which can efficiently perform inter-prediction by applying a regular merge mode to the current block on the basis of the case in which an MMVD mode, a merge sub-block mode, a CIIP mode, and a partitioning mode, in which prediction is performed by dividing the current block into two partitions, are not available for the current block.

公开(公告)号：US20240414328A1

公开(公告)日：2024-12-12

申请号：US18702283

申请日：2022-10-21

Applicant: LG ELECTRONICS INC.

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

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

Abstract: According to the present disclosure, an image decoding method performed by a decoding apparatus comprises the steps of: receiving a bitstream including prediction-related information; configuring a list of MPMs including intra prediction mode candidates for a current block; decoding remaining mode information related to remaining intra prediction modes other than the intra prediction mode candidates included in the list of MPMs; deriving an intra prediction mode of the current block on the basis of the remaining mode information; generating prediction samples for the current block on the basis of the intra prediction mode of the current block; and generating reconstructed samples for the current block on the basis of the prediction samples for the current block, wherein on the basis that DIMD mode or TIMD for the current block can be derived, a plurality of intra prediction modes are derived on the basis of the remaining mode information.