公开(公告)号：US20240406383A1

公开(公告)日：2024-12-05

申请号：US18804497

申请日：2024-08-14

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jin HEO ,  Seunghwan KIM ,  Jaehyun LIM ,  Ling LI

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

Abstract: A method for decoding an image by a decoding device according to the present document comprises the steps of receiving prediction-related information of a current block; deriving an intra prediction type of the current block on the basis of the prediction-related information; forming an intra prediction mode candidate list of the current block on the basis of intra prediction modes of blocks neighboring the current block; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and deriving reference samples of the current block on the basis of the intra prediction type and the intra prediction mode, and deriving a prediction sample on the basis of the reference samples.

公开(公告)号：US20240275952A1

公开(公告)日：2024-08-15

申请号：US18644760

申请日：2024-04-24

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jin HEO ,  Junghak NAM

IPC: H04N19/105 ,  H04N19/107 ,  H04N19/11 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/107 ,  H04N19/11 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176

Abstract: A method for decoding a video performed by a decoding device according to the present disclosure, comprises: a step for deriving a prediction mode of a neighboring block of a current block; a step for deriving an intra prediction mode candidate for configuring an MPM list on the basis of the derived prediction mode of the neighboring block; a step for configuring the MPM list on the basis of the derived intra prediction mode candidate; a step for determining an intra prediction mode for the current block on the basis of the configured MPM list; a step for deriving prediction samples for the current block on the basis of the determined intra prediction mode for the current block; and a step for generating a reconstructed picture on the basis of the prediction samples.

公开(公告)号：US20240244257A1

公开(公告)日：2024-07-18

申请号：US18391092

申请日：2023-12-20

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Jungah CHOI

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176

Abstract: An image decoding method according to the present document comprises the steps of: acquiring, from a bitstream, reference line index information indicating a reference line to be used for intra prediction of a current block; constructing a most probable mode (MPM) list by deriving candidate intra prediction modes of the current block on the basis of the value of the reference line index information; deriving the intra prediction mode of the current block on the basis of the MPM list; generating prediction samples for the current block on the basis of the intra prediction mode; and generating restoration samples for the current block on the basis of the prediction samples, wherein, on the basis of the case in which the value of the reference line index information is not zero, one of the candidate intra prediction modes is a DC mode and the number of candidate intra prediction modes including the DC mode is 5.

公开(公告)号：US20240015282A1

公开(公告)日：2024-01-11

申请号：US18371319

申请日：2023-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Ling LI

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/105 ,  H04N19/96

CPC classification number: H04N19/186 ,  H04N19/176 ,  H04N19/105 ,  H04N19/96

Abstract: A picture decoding method, performed by a decoding apparatus according to the present disclosure, comprises the steps of: when an intra-prediction mode of a chroma block is a cross-component linear model (CCLM) mode, deriving neighboring chroma reference samples with respect to the chroma block; deriving neighboring luma reference samples of a luma block corresponding to the chroma block and luma samples in the luma block; deriving down-sampled neighboring luma reference samples and downsampled luma samples by down sampling the neighboring luma reference samples and the luma samples, respectively; deriving a linear model parameter on the basis of the down-sampled neighboring luma reference samples and the neighboring chroma reference samples; generating prediction samples with respect to the chroma block on the basis of the linear model parameter and the down-sampled luma samples of the luma block; and reconstructing the chroma block on the basis of the prediction samples with respect to the chroma block.

公开(公告)号：US20230421771A1

公开(公告)日：2023-12-28

申请号：US18244764

申请日：2023-09-11

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jaehyun LIM ,  Jin HEO ,  Junghak NAM

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82 ,  H04N19/96

CPC classification number: H04N19/132 ,  H04N19/117 ,  H04N19/159 ,  H04N19/96 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82 ,  H04N19/176

Abstract: An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: receiving a bitstream including prediction information for a current block; deriving a chroma array type for the current block on the basis of a separate color plane flag indicating whether three color components are separately coded and a chroma format index indicating a chroma format sampling structure for the current block, which are included in the prediction information for the current block; deriving prediction samples for the current block on the basis of the derived chroma array type; and deriving reconstructed samples for the current block on the basis of the prediction samples.

公开(公告)号：US20230232010A1

公开(公告)日：2023-07-20

申请号：US18126143

申请日：2023-03-24

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jaehyun LIM ,  Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70 ,  H04N19/88

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70 ,  H04N19/88

Abstract: An image decoding method performed by a decoding device, according to the present document, comprises the steps of: receiving a bitstream including residual information of a current block; deriving a specific number of context-encoding bins for context syntax elements for a current sub-block of the current block; decoding the context syntax elements for the current sub-block included in the residual information on the basis of the specific number; deriving transform coefficients for the current sub-block on the basis of the decoded context syntax elements; deriving residual samples for the current block on the basis of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20230199176A1

公开(公告)日：2023-06-22

申请号：US18112259

申请日：2023-02-21

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI

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

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

Abstract: An image decoding method according to the present disclosure comprises the steps of: obtaining intra prediction type related information for a current block from a bit stream; deriving the intra prediction type of the current block based on the intra prediction type-related information; obtaining intra prediction mode-related information for the current block from the bitstream; configuring a most probable mode (MPM) list including candidate intra prediction modes for the current block based on neighboring blocks of the current block; deriving the intra prediction mode of the current block based on the MPM list and the intra prediction mode-related information; and generating a predicted block of the current block based on the intra prediction type and the intra prediction mode, wherein when the intra prediction type indicates the particular intra prediction type, the MPM index is parsed from the bit stream without parsing of an MPM flag.

公开(公告)号：US20230145282A1

公开(公告)日：2023-05-11

申请号：US18092826

申请日：2023-01-03

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jung Hak NAM ,  Jaehyun LIM ,  Jin HEO ,  Seung Hwan KIM

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/423 ,  H04N19/70 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/186 ,  H04N19/423 ,  H04N19/70 ,  H04N19/82

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining a chroma array type of a current image, determining an adaptive loop filter (ALF) indicator of a chroma component based on the chroma array type, and performing ALF filtering with respect to a reconstructed image based on a value of the ALF indicator. The value of the ALF indicator may be determined to be a predetermined value without being obtained from a bitstream, based on the chroma array type being a predetermined type, and the value of the ALF indicator may be obtained from the bitstream, based on the chroma array type being not the predetermined type.

公开(公告)号：US20220417517A1

公开(公告)日：2022-12-29

申请号：US17373522

申请日：2021-07-12

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jungah CHOI ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/117 ,  H04N19/82 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method according to the present disclosure comprises the steps of: deriving downsampled luma samples and downsampled peripheral luma samples on the basis of a current luma block and peripheral samples of the current luma block; and deriving a cross-component linear model (CCLM) parameter on the basis of the downsampled peripheral luma samples and peripheral chroma samples of a current chroma block, wherein the peripheral chroma samples include left peripheral chroma samples of the current chroma block and upper peripheral chroma samples of the current chroma block, and the downsampled peripheral luma samples include two downsampled left peripheral luma samples related to the left peripheral chroma samples and two downsampled upper peripheral luma samples related to the upper peripheral chroma samples.

公开(公告)号：US20220417512A1

公开(公告)日：2022-12-29

申请号：US17867133

申请日：2022-07-18

Applicant: LG ELECTRONICS INC.

Inventor： Ling LI ,  Jin HEO ,  Moonmo KOO ,  Jung Hak NAM

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include determining whether a prediction mode of a current block is an intra prediction mode based on information on the prediction mode of the current block, determining whether intra sub-partitions (ISP) is available for the current block, when the prediction mode of the current block is an intra prediction mode, decoding an ISP application indicator indicating whether to apply ISP to the current block, when ISP is available for the current block, and generating a prediction block for the current block by applying ISP to the current block, upon determining that ISP applies to the current block based on the ISP application indicator.