公开(公告)号：US20240098261A1

公开(公告)日：2024-03-21

申请号：US18520912

申请日：2023-11-28

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Jangwon CHOI

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/169 ,  H04N19/186 ,  H04N19/46 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/1883 ,  H04N19/46 ,  H04N19/80

Abstract: According to one embodiment of the present document, a cross component adaptive loop filtering (CCALF) process may be performed. The CCALF process can enhance the filtering performance for chroma components and improve the subjective/objective image quality of a picture.

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：US20230396772A1

公开(公告)日：2023-12-07

申请号：US18234710

申请日：2023-08-16

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Hyeong Moon JANG ,  Jangwon CHOI

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

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus include features of generating a prediction block by performing intra prediction on a current block, determining whether to apply position dependent intra prediction combination (PDPC) to the prediction block, and generating a final prediction block of the current block, by applying PDPC to the prediction block based on the determination. The determining whether to apply PDPC to the prediction block may include determining whether a size of the current block satisfies a predetermined condition. Based on the size of the current block satisfying the predetermined condition, it may be determined to apply PDPC to the prediction block. Based on the size of the current block not satisfying the predetermined condition, a determination of a color component of the current block may be skipped and it may be determined not to apply PDPC to the prediction block.

公开(公告)号：US20230370599A1

公开(公告)日：2023-11-16

申请号：US18225984

申请日：2023-07-25

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/70 ,  H04N19/12

CPC classification number: H04N19/124 ,  H04N19/12 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/70 ,  H04N19/159

Abstract: An image decoding method according to the present document comprises the steps of: receiving a bitstream including residual information; deriving a quantized transform coefficient for a current block on the basis of the residual information included in the bitstream; deriving a residual sample for the current block on the basis of the quantized transform coefficient; and generating a reconstructed picture on the basis of the residual sample for the current block, wherein the residual information may be derived via different syntax elements depending on whether a transform has been applied to the current block.

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：US20230164355A1

公开(公告)日：2023-05-25

申请号：US17916466

申请日：2021-03-30

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Sunmi YOO ,  Junghak NAM ,  Jin HEO ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/60 ,  H04N19/124 ,  H04N19/176 ,  H04N19/11

CPC classification number: H04N19/60 ,  H04N19/124 ,  H04N19/176 ,  H04N19/11

Abstract: A method by which a decoding device decodes an image, according to the present document, comprises the steps of: acquiring a dependent quantization available flag about whether dependent quantization is available; acquiring a sign data hiding available flag about whether sign data hiding is available; and acquiring, on the basis of the dependent quantization available flag and the sign data hiding available flag, a transform skip residual coding (TSRC) available flag about whether TSRC is available.

公开(公告)号：US20230086768A1

公开(公告)日：2023-03-23

申请号：US17797924

申请日：2021-02-05

Applicant: LG Electronics Inc.

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

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

Abstract: A method, performed by a decoding device, for decoding an image according to the present document comprises the steps of: acquiring residual information of a current block; deriving residual samples of the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the residual samples.

公开(公告)号：US20230021515A1

公开(公告)日：2023-01-26

申请号：US17849296

申请日：2022-06-24

Applicant: LG ELECTRONICS INC.

Inventor： Jungah CHOI ,  Sunmi YOO ,  Jaehyun LIM ,  Jangwon CHOI ,  Seunghwan KIM

IPC: H04N19/593 ,  H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/159 ,  H04N19/11 ,  H04N19/132 ,  H04N19/136

Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: obtaining a Block-based Delta Pulse Code Modulation (BDPCM) available flag indicating whether or not BDPCM is available for a chroma block and a luma block; obtaining BDPCM-related information for a current luma block and current chroma blocks on the basis of the BDPCM available flag; and generating reconstructed samples for the current luma block and the current chroma blocks on the basis of the BDPCM-related information.

公开(公告)号：US20230007267A1

公开(公告)日：2023-01-05

申请号：US17894762

申请日：2022-08-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/174 ,  H04N19/46

Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: obtaining a sign data hiding availability flag indicating whether or not sign data hiding is available for a current slice; obtaining a TSRC availability flag indicating whether or not TSRC is available for a transform skip block of the current slice; obtaining residual coding information about the transform skip block on the basis of the TSRC availability flag; deriving a residual sample for the transform skip block on the basis of the residual coding information; and generating a reconstruction picture on the basis of the residual sample, wherein the TSRC availability flag is obtained on the basis of the sign data hiding availability flag.