公开(公告)号：US20230308665A1

公开(公告)日：2023-09-28

申请号：US18202023

申请日：2023-05-25

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

CPC classification number: 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.

公开(公告)号：US11750801B2

公开(公告)日：2023-09-05

申请号：US17979642

申请日：2022-11-02

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Seunghwan Kim

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

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

Abstract: A picture decoding method which is performed by a decoding apparatus according to an example of the present disclosure includes constructing a Most Probable Modes (MPM) list including intra prediction mode candidates for a current block based on neighboring blocks of the current block, decoding remaining mode information indicating one of remaining intra prediction modes other than the intra prediction mode candidates included in the MPM list from a bitstream, determining an intra prediction mode of the current block based on the decoded remaining mode information, generating prediction samples for the current block based on the determined intra prediction mode, and generating reconstructed samples for the current block based on the prediction samples for the current block, wherein the remaining mode information is decoded based on a truncated binary code.

公开(公告)号：US20230276050A1

公开(公告)日：2023-08-31

申请号：US18142199

申请日：2023-05-02

Applicant: LG Electronics Inc.

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/124 ,  H04N19/60 ,  H04N19/136

CPC classification number: H04N19/13 ,  H04N19/176 ,  H04N19/124 ,  H04N19/60 ,  H04N19/136

Abstract: An image decoding method includes receiving residual information including first size related information for a first residual coefficient and second size related information for a second residual coefficient, setting a Rice parameter of the first size related information and the second size related information as a specific value, deriving available binary values based on the Rice parameter, deriving binary values of the first size related information and the second size related information by decoding the first size related information and the second size related information, deriving values of the first size related information and the second size related information by comparing the binary values and the available binary values, deriving the first residual coefficient and the second residual coefficient based on the values, and reconstructing a current picture based on the first residual coefficient and the second residual coefficient.

公开(公告)号：US11695959B2

公开(公告)日：2023-07-04

申请号：US17562389

申请日：2021-12-27

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Jung Hak Nam

IPC: H04N19/61 ,  H04N19/11 ,  H04N19/119 ,  H04N19/122 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/61 ,  H04N19/11 ,  H04N19/119 ,  H04N19/122 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining a prediction mode of a current block, generating a prediction block of the current block based on intra block copy (IBC) prediction mode information, based on the prediction mode of the current block being an IBC prediction mode, determining a size of a transform block of the current block based on a color component of the current block, generating a residual block of the current block based on the size of the transform block; and reconstructing the current block based on the prediction block and the residual block of the current block.

公开(公告)号：US11695924B2

公开(公告)日：2023-07-04

申请号：US17868888

申请日：2022-07-20

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Jin Heo ,  Seunghwan Kim

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

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

Abstract: A video decoding method according to this document includes deriving a first candidate intra prediction mode based on a first neighboring block located on a left side of a current block, deriving a second candidate intra prediction mode based on a second neighboring block located on an upper side of the current block, constructing a most probable mode (MPM) list for 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, generating predicted samples by performing prediction for the current block based on the intra prediction mode, and generating a reconstructed picture for the current block based on the predicted samples.

公开(公告)号：US11677952B2

公开(公告)日：2023-06-13

申请号：US17865959

申请日：2022-07-15

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/60 ,  H04N19/136 ,  H04N19/124

CPC classification number: H04N19/13 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/60

Abstract: An image decoding method includes receiving residual information including first size related information for a first residual coefficient and second size related information for a second residual coefficient, setting a Rice parameter of the first size related information and the second size related information as a specific value, deriving available binary values based on the Rice parameter, deriving binary values of the first size related information and the second size related information by decoding the first size related information and the second size related information, deriving values of the first size related information and the second size related information by comparing the binary values and the available binary values, deriving the first residual coefficient and the second residual coefficient based on the values, and reconstructing a current picture based on the first residual coefficient and the second residual coefficient.

公开(公告)号：US11632557B2

公开(公告)日：2023-04-18

申请号：US17418378

申请日：2019-12-31

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/159 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

Abstract: A method for decoding a video performed by a decoding device according to the present document comprises: a step for receiving residual information for a current block; a step for parsing one sign flag for a current sub-block of the current block, wherein the one sign flag indicates whether all signs of non-zero residual coefficients of the current sub-block are the same; a step for deriving the non-zero residual coefficients on the basis of sign information for the non-zero residual coefficients when the value of the one sign flag is 1; a step for deriving residual samples on the basis of the non-zero residual coefficients; and a step for restoring a current picture on the basis of the residual samples.

公开(公告)号：US11616947B2

公开(公告)日：2023-03-28

申请号：US17389810

申请日：2021-07-30

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Seunghwan Kim ,  Ling Li

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

公开(公告)号：US11563942B2

公开(公告)日：2023-01-24

申请号：US17562315

申请日：2021-12-27

Applicant: LG Electronics Inc.

Inventor： Ling Li ,  Jung Hak Nam

IPC: H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include obtaining a current block by splitting an image, determining a prediction mode of the current block, generating an intra prediction block of the current block, based on the prediction mode of the current block being an intra prediction mode, generating a residual block of the current block, and reconstructing the current block based on the prediction block and the residual block of the current block.

公开(公告)号：US11330255B2

公开(公告)日：2022-05-10

申请号：US16953519

申请日：2020-11-20

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/11 ,  H04N19/176 ,  H04N19/46

Abstract: According to the present disclosure, a video decoding method performed by a video decoding device includes parsing remaining intra prediction mode information for a current block, deriving neighboring samples of the current block, deriving MPM list including MPM candidates of the current block, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates, deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples, and deriving a reconstructed picture based on the prediction sample, wherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and wherein a binarization parameter for the TB binarization process is 60.