公开(公告)号：US12132908B2

公开(公告)日：2024-10-29

申请号：US18232125

申请日：2023-08-09

申请人： LG Electronics Inc.

发明人： Hyeong Moon Jang ,  Jin Heo ,  Jung Hak Nam ,  Jangwon Choi

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

CPC分类号： H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

摘要： 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：US20240357077A1

公开(公告)日：2024-10-24

申请号：US18632155

申请日：2024-04-10

申请人： LG ELECTRONICS INC.

发明人： Ling LI ,  Jaehyun Lim ,  Jin Heo ,  Janwon Choi ,  Seunghwan KIM

IPC分类号： H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

CPC分类号： H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

摘要： An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining intra prediction information including at least one of MPM flag information, MRL index information, and planner flag information from a bitstream; checking the MPM flag information; checking the MRL index information on the basis of a case where the MPM flag information indicates that the MRL index information is checked; checking the planner flag information on the basis of a case where a value of the MRL index information is 0; deriving an intra prediction mode for a current block on the basis of the check for the planner flag information; deriving prediction samples for the current block on the basis of the intra prediction mode for the current block; and generating a reconstructed picture on the basis of the prediction samples.

公开(公告)号：US12113979B2

公开(公告)日：2024-10-08

申请号：US17563776

申请日：2021-12-28

申请人： LG ELECTRONICS INC.

发明人： Jungah Choi ,  Sunmi Yoo ,  Seunghwan Kim ,  Jangwon Choi ,  Jin Heo

IPC分类号： H04N19/124 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/60 ,  H04N19/70

CPC分类号： H04N19/124 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/60 ,  H04N19/70

摘要： A method by which a decoding device decodes an image includes: receiving a bitstream including residual information; deriving a residual sample for the current block on the basis of a quantized transform coefficient; and generating a reconstructed picture on the basis of the residual sample for the current block, where the residual information includes a context-based coded context syntax element, where the deriving the quantized transform coefficient decodes the context syntax element based on a context and based on a predetermined maximum value for the context syntax element, and where the maximum value is determined by a unit of the transform block and the maximum value is determined based on the size of the transform block.

公开(公告)号：US12088800B2

公开(公告)日：2024-09-10

申请号：US17438347

申请日：2020-03-12

申请人： LG Electronics Inc.

发明人： Ling Li ,  Jin Heo

IPC分类号： H04N19/11 ,  H04N19/117 ,  H04N19/176

CPC分类号： H04N19/11 ,  H04N19/117 ,  H04N19/176

摘要： An image decoding method is disclosed. The image decoding method includes obtaining intra prediction mode information of a current block from a bitstream, determining an intra prediction mode of the current block based on the intra prediction mode information and an intra prediction mode of a neighboring block located around the current block, deriving a value of a first filter flag for use of filtering of an intra prediction reference sample of the current block based on coding parameters for the current block, selecting an interpolation filter to be used for intra prediction of the current block based on the first filter flag, and generating an intra prediction block of the current block using the selected interpolation filter.

公开(公告)号：US12041247B2

公开(公告)日：2024-07-16

申请号：US17637290

申请日：2020-08-20

申请人： LG ELECTRONICS INC.

发明人： Jungah Choi ,  Jin Heo ,  Sunmi Yoo ,  Jangwon Choi ,  Jaehyun Lim ,  Seunghwan Kim

IPC分类号： H04N19/18 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70

CPC分类号： H04N19/18 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70

摘要： A video decoding method performed by a decoding apparatus comprises the steps of: acquiring, from a bitstream, residual information for a current transform block, wherein the residual information includes at least one of information indicating a level value of a target transform coefficient within the current transform block or information indicating a residual level value; based on a neighboring transform coefficient of the target transform coefficient, deriving a rice parameter for at least one of the information indicating the level value of the target transform coefficient or the information indicating the residual level value; based on the rice parameter, deriving a bin string for at least one of the information indicating the level value of the target transform coefficient or the information indicating the residual level value; and based on the bin string, deriving the level value of the target transform coefficient.

公开(公告)号：US20240155123A1

公开(公告)日：2024-05-09

申请号：US18411897

申请日：2024-01-12

申请人： LG ELECTRONICS INC.

发明人： Jangwon Choi ,  Jin Heo ,  Summi Yoo ,  Jungah Choi ,  Seung Hwan Kim

IPC分类号： H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

CPC分类号： H04N19/119 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

摘要： An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining a splitting type of a current block, splitting the current block into a plurality of lower-layer blocks based on the splitting type, and decoding the lower-layer blocks. In this case, the current block may be a chroma block, and the determining the splitting type of the current block may be performed by disallowing a predetermined type, in which a width or height of the lower-layer blocks is a predetermined value, among a plurality of splitting types.

公开(公告)号：US11968359B2

公开(公告)日：2024-04-23

申请号：US18199191

申请日：2023-05-18

申请人： LG ELECTRONICS INC.

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

IPC分类号： H04N19/105 ,  H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/70

CPC分类号： H04N19/105 ,  H04N19/11 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/70

摘要： A video decoding method according to this document includes constructing a most probable mode (MPM) list by deriving MPM candidates for a current block based on a neighboring block adjacent to the current block, 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：US11956451B2

公开(公告)日：2024-04-09

申请号：US18202023

申请日：2023-05-25

申请人： LG ELECTRONICS INC.

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

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

CPC分类号： H04N19/186 ,  H04N19/105 ,  H04N19/136 ,  H04N19/176

摘要： A video decoding method performed by a decoding apparatus 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 derived as 2. The method includes 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.

公开(公告)号：US11902582B2

公开(公告)日：2024-02-13

申请号：US18131113

申请日：2023-04-05

申请人： LG ELECTRONICS INC.

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

IPC分类号： H04N19/64 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91 ,  H04N19/513 ,  H04N19/61

CPC分类号： H04N19/647 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91 ,  H04N19/513 ,  H04N19/619 ,  H04N19/64

摘要： 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 residual samples for the current block based on the quantized transform coefficients; and generating a reconstructed picture based on the residual samples for the current block.

公开(公告)号：US11902572B2

公开(公告)日：2024-02-13

申请号：US17431348

申请日：2020-02-26

申请人： LG ELECTRONICS INC.

发明人： Jin Heo ,  Sunmi Yoo ,  Ling Li ,  Jangwon Choi ,  Jungah Choi

IPC分类号： H04N7/12 ,  H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176

CPC分类号： H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/132 ,  H04N19/176

摘要： 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.