公开(公告)号：US20240323365A1

公开(公告)日：2024-09-26

申请号：US18619945

申请日：2024-03-28

Applicant: LG ELECTRONICS INC.

Inventor： Hyeong Moon JANG ,  Jin HEO

IPC: H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

CPC classification number: H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise identifying a current chroma block by splitting an image, identifying whether a matrix based intra prediction mode applies to a first luma sample position corresponding to the current chroma block, identifying whether a predetermined prediction mode applies to a second luma sample position corresponding to the current chroma block, based on the matrix based intra prediction mode doing not apply, and determining an intra prediction mode candidate of the current chroma block based on an intra prediction mode applying to a third luma sample position corresponding to the current chroma block, based on the predetermined prediction mode doing not apply.

公开(公告)号：US20240305823A1

公开(公告)日：2024-09-12

申请号：US18623644

申请日：2024-04-01

Applicant: LG Electronics Inc.

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

IPC: H04N19/60 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18

CPC classification number: H04N19/60 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18

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 restoration picture on the basis of the residual sample for the current block, wherein the residual information includes position information for indicating the position of a transform coefficient, which is not the last 0 in a transform block, and the position information can be derived if a transform skip is not applied to the transform block.

公开(公告)号：US20240297984A1

公开(公告)日：2024-09-05

申请号：US18662464

申请日：2024-05-13

Applicant: LG Electronics Inc.

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

IPC: H04N19/105 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/18 ,  H04N19/1883 ,  H04N19/70

Abstract: A video decoding method performed by a decoding apparatus according to the present document may comprise the steps of: obtaining, from a bitstream, information indicating a level value of a transform coefficient in a current block; selecting one Rice parameter look-up table for the information indicating the level value of the transform coefficient, from among a plurality of Rice parameter look-up tables; deriving a Rice parameter for the information indicating the level value of the transform coefficient on the basis of the selected Rice parameter look-up table; deriving a bin string for the information indicating the level value of the transform coefficient on the basis of the Rice parameter; and deriving the level value of the transform coefficient on the basis of the bin string.

公开(公告)号：US20240146920A1

公开(公告)日：2024-05-02

申请号：US18383216

申请日：2023-10-24

Applicant: LG ELECTRONICS INC.

Inventor： JANGWON CHOI ,  Seunghwan KIM ,  Jin HEO

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

CPC classification number: H04N19/119 ,  H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

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：US20240107062A1

公开(公告)日：2024-03-28

申请号：US18524327

申请日：2023-11-30

Applicant: LG Electronics Inc.

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

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of deriving an intra prediction type for a current block from among intra prediction types; constituting an intra prediction mode candidate list of the current block on the basis of intra prediction modes of neighboring blocks of the current block; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and generating prediction samples of the current block on the basis of the intra prediction type and the intra prediction mode.

公开(公告)号：US20240107034A1

公开(公告)日：2024-03-28

申请号：US18511346

申请日：2023-11-16

Applicant: LG Electronics Inc.

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

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

CPC classification number: H04N19/18 ,  H04N19/184 ,  H04N19/70

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：US20240031604A1

公开(公告)日：2024-01-25

申请号：US17801939

申请日：2021-02-25

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

CPC classification number: H04N19/60 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus according to the present document is characterized by comprising the steps of: acquiring image information; and generating a reconstructed picture on the basis of the image information.

公开(公告)号：US20230276052A1

公开(公告)日：2023-08-31

申请号：US18142804

申请日：2023-05-03

Applicant: LG ELECTRONICS INC.

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

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

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

Abstract: A method for performing video decoding by a decoding device 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：US20230276045A1

公开(公告)日：2023-08-31

申请号：US18144458

申请日：2023-05-08

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Seunghwan KIM ,  Jin HEO

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

Abstract: An image decoding method performed by a decoding device according to the present document comprises: a step for deriving the number of samples of upper peripheral chroma samples and left peripheral chroma samples of a current chroma block on the basis of a specific value and the width and height of the current chroma block; a step for deriving said number of upper peripheral chroma samples and said number of left peripheral chroma samples; and a step for deriving CCLM parameters on the basis of the upper peripheral chroma samples, the left peripheral chroma samples, and down-sampled peripheral luma samples, wherein, when the specific value is derived as 2 and the width and the height of the current chroma block are larger than the specific value, the number of samples is derived as the specific value.

公开(公告)号：US20230199173A1

公开(公告)日：2023-06-22

申请号：US18109656

申请日：2023-02-14

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Seunghwan KIM ,  Ling LI

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

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

Abstract: An image decoding method according to the present disclosure comprises deriving a first candidate intra prediction mode based on a first neighboring block of a current block; deriving a second candidate intra prediction mode based on a second neighboring block of the current block; constructing MPM (Most Probable Mode) list of the current block based on the first candidate intra prediction mode and the second candidate intra prediction mode; deriving an intra prediction mode for the current block based on the MPM list; and generating a prediction sample for the current block based on the intra prediction mode, wherein the first neighboring block is a left neighboring block located at the lowermost side among neighboring blocks adjacent to a left boundary of the current block, and wherein the second neighboring block is an upper neighboring block located at the rightmost side among neighboring blocks adjacent to an upper boundary of the current block.