公开(公告)号：US20240163475A1

公开(公告)日：2024-05-16

申请号：US18422857

申请日：2024-01-25

Applicant: LG Electronics Inc.

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

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30 ,  H04N19/70

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30 ,  H04N19/70

Abstract: An image decoding method according to this disclosure includes receiving image information including intra matrix-based intra prediction (MIP) flag information related to whether an MIP is applied to a current block through a bitstream, deriving an intra prediction type for the current block as the MIP based on the intra MIP flag information, generating intra prediction samples for the current block based on the MIP, and generating reconstructed samples for the current block based on the intra prediction samples.

公开(公告)号：US20240056579A1

公开(公告)日：2024-02-15

申请号：US18383327

申请日：2023-10-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/129 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

CPC classification number: H04N19/132 ,  H04N19/129 ,  H04N19/176 ,  H04N19/46 ,  H04N19/60

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information; deriving quantized transform coefficients for a current block based on the residual information included in the bitstream; deriving transform coefficients for the current block from the quantized transform coefficients based on an inverse quantization process; deriving residual samples for the current block by applying inverse transform to the derived transform coefficients; and generating a reconstructed picture based on the residual samples for the current block.

公开(公告)号：US20230388512A1

公开(公告)日：2023-11-30

申请号：US18232125

申请日：2023-08-09

Applicant: LG Electronics Inc.

Inventor： Hyeong Moon JANG ,  Jin HEO ,  Jung Hak NAM ,  Jangwon CHOI

IPC: H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

CPC classification number: H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure comprises determining whether to apply intra prediction to a current chroma block based on information on prediction of the current chroma block, deriving an intra prediction mode of the current chroma block based on an intra prediction mode of a corresponding luma block corresponding to the current chroma block and intra chroma prediction mode information of the current chroma block, when intra prediction applies to the current chroma block, and generating a prediction block of the current chroma block, by performing intra prediction based on the intra prediction mode of the current chroma block. When the intra prediction mode of the corresponding luma block is not present, the intra prediction mode of the current chroma block is derived based on a default intra prediction mode.

公开(公告)号：US20230308636A1

公开(公告)日：2023-09-28

申请号：US18131767

申请日：2023-04-06

Applicant: LG Electronics Inc.

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

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

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

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving intra prediction information including at least one of most probable mode (MPM) flag information representing whether to derive an intra prediction mode for a current block based on MPM candidates for the current block or planar flag information representing whether to determine the intra prediction mode for the current block as a planar mode, deriving the intra prediction mode for the current block based on the MPM flag information and the planar flag information, deriving a predicted block for the current block based on the intra prediction mode for the current block, and generating a reconstructed picture based on the predicted block.

公开(公告)号：US20230042089A1

公开(公告)日：2023-02-09

申请号：US17957986

申请日：2022-09-30

Applicant: LG Electronics Inc.

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

IPC: H04N19/18 ,  H04N19/70 ,  H04N19/184

Abstract: An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring a sign data hiding enable flag; acquiring a transform skip residual coding (TSRC) enable flag on the basis of the sign data hiding enable flag; acquiring residual information for a current block, on the basis of the TSRC enable flag; deriving a residual sample of the current block, on the basis of the residual information; and generating a reconstructed picture on the basis of the residual sample, wherein the sign data hiding enable flag is a flag indicating whether sign data hiding is enabled, the TSRC enable flag is a flag indicating whether TSRC is enabled, and the TSRC enable flag is acquired on the basis of the sign data hiding enable flag having a value of zero.

公开(公告)号：US20220337814A1

公开(公告)日：2022-10-20

申请号：US17760676

申请日：2020-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Jangwon CHOI ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Moonmo KOO

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method may comprise determining an intra prediction mode of a current block, determining a reference sample based on the intra prediction mode and a neighboring sample of the current block, generating the prediction block based on the reference sample, and decoding the current block based on the prediction block. The reference sample may be determined by applying at least one of first filtering or second filtering to the neighboring sample value based on the intra prediction mode.

公开(公告)号：US20220329796A1

公开(公告)日：2022-10-13

申请号：US17740037

申请日：2022-05-09

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Seunghwan KIM ,  Jin HEO

IPC: H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186

Abstract: The method for decoding an image by a decoding device according to the present document may comprise the steps of: acquiring image information comprising partitioning information for a current block; determining, on the basis of the size of the current block, whether to partition the current block; partitioning the current block into subblocks on the basis of the partitioning information, if it is determined that the current block is to be partitioned, and decoding the subblocks; and not partitioning the current block, if it is determined that the current block is not to be partitioned, and decoding the current block, wherein, if the current block is a chroma block, and the size of the current block is at most the minimum size of a chroma block, then it is determined that the current block is not to be partitioned.

公开(公告)号：US20220272351A1

公开(公告)日：2022-08-25

申请号：US17739468

申请日：2022-05-09

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196

Abstract: A method for decoding a picture based on a cross-component linear model (CCLM) mode includes deriving neighboring luma reference samples of a luma block, deriving down-sampled neighboring luma reference samples, deriving a linear model parameter based on the down-sampled neighboring luma reference samples and the neighboring chroma reference samples, where the neighboring luma reference samples includes top neighboring luma reference samples, and left neighboring luma reference samples, and where when the top boundary of the luma block overlaps with a boundary of a coding tree unit (CTU), the number of the top neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples among the neighboring luma reference samples is less than that of the left neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples.

公开(公告)号：US20220264104A1

公开(公告)日：2022-08-18

申请号：US17732087

申请日：2022-04-28

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

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：US20220248036A1

公开(公告)日：2022-08-04

申请号：US17719090

申请日：2022-04-12

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin Heo ,  Seunghwan Kim ,  Sunmi Yoo ,  Ling Li ,  Jungah Choi

IPC: H04N19/186 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176

Abstract: A video decoding method performed by a decoding apparatus according to the present disclosure includes deriving one of a plurality of cross-component linear model (CCLM) prediction mode as a CCLM prediction mode of the current chroma block, deriving a sample number of neighboring chroma samples of the current chroma block based on the CCLM prediction mode of the current chroma block, a size of the current chroma block, and a specific value; deriving the neighboring chroma samples of the sample number, calculating CCLM parameters based on the neighboring chroma samples and the down sampled neighboring luma samples, deriving prediction samples for the current chroma block based on the CCLM parameters and the down sampled luma samples and generating reconstructed samples for the current chroma block based on the prediction samples, wherein the specific value is derived as 2.