公开(公告)号：US11240533B2

公开(公告)日：2022-02-01

申请号：US17368005

申请日：2021-07-06

Applicant: LG Electronics Inc.

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

IPC: H04N11/02 ,  H04N19/60 ,  H04N19/184 ,  H04N19/70 ,  H04N19/132 ,  H04N19/176 ,  H04N19/137

Abstract: A video decoding method performed by a decoding apparatus according to the present document comprises the steps of: receiving a bit stream including residual information of a current block; deriving a specific number of the 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：US20210400263A1

公开(公告)日：2021-12-23

申请号：US17406528

申请日：2021-08-19

Applicant: LG Electronics Inc.

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

IPC: H04N19/11 ,  H04N19/593 ,  H04N19/176 ,  H04N19/119 ,  H04N19/105 ,  H04N19/46

Abstract: Embodiments of the present specification provide a method and a device for processing a video signal for intra prediction. A method for decoding a video signal according an embodiment of the present disclosure includes: obtaining intra prediction information of a current block to which the intra prediction is applied, in which the intra prediction information includes a first flag indicating a predetermined first mode; determining an intra prediction mode of the current block based on the intra prediction information, wherein when the first flag corresponds to a first value, the first mode is determined as the intra prediction mode and when the first flag corresponds to a second value, one of a plurality of candidate modes is determined as the intra prediction mode; and generating a prediction sample of the current block based on the intra prediction mode and a reference sample in a current picture. A separate flag indicating whether to use a primarily used specific mode is used to reduce a data amount for transmission of the intra prediction mode and a processing time of information of the intra prediction.

公开(公告)号：US11012699B2

公开(公告)日：2021-05-18

申请号：US16892095

申请日：2020-06-03

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.

公开(公告)号：US20200296391A1

公开(公告)日：2020-09-17

申请号：US16892095

申请日：2020-06-03

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.

公开(公告)号：US20200021807A1

公开(公告)日：2020-01-16

申请号：US16509745

申请日：2019-07-12

Applicant: LG ELECTRONICS INC.

Inventor： Seunghwan Kim ,  Ling Li ,  Jaehyun Lim

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

Abstract: Provided is a decoding method performed by a decoding apparatus, which includes: obtaining intra prediction information of the current block through a bitstream; deriving an intra prediction mode of the current block based on remaining intra prediction mode information; deriving a prediction sample of the current block based on the intra prediction mode; and deriving a reconstructed picture based on the prediction sample, in which the intra prediction information includes the remaining intra prediction mode information, and the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process.

公开(公告)号：US20250159210A1

公开(公告)日：2025-05-15

申请号：US19022299

申请日：2025-01-15

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.

公开(公告)号：US12301824B2

公开(公告)日：2025-05-13

申请号：US18664077

申请日：2024-05-14

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Jung Hak Nam

IPC: H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  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 inter prediction mode information, based on the prediction mode of the current block being an inter prediction mode, generating a residual block of the current block based on a transform block of the current block, and reconstructing the current block based on the prediction block and the residual block of the current bloc.

公开(公告)号：US20250113024A1

公开(公告)日：2025-04-03

申请号：US18980322

申请日：2024-12-13

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Sunmi Yoo ,  Ling Li ,  Jangwon Choi ,  Jungah Choi

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/593

Abstract: An image decoding method according to the present document derives a left mode, which is a candidate intra prediction mode for a left peripheral block of a current block, derives an upper mode, which is a candidate intra prediction mode for an upper peripheral block of the current block, constructs an MPM list on the basis of the left mode and the upper mode, derives an intra prediction mode of the current block on the basis of the MPM list, generates prediction samples of the current block on the basis of the intra prediction mode, generates a restoration picture of the current block on the basis of the prediction samples, and derives the left mode or the upper mode as one from among candidate intra prediction modes of the MPM list, on the basis of when the left mode and the upper mode are not the same and the left mode and the upper mode are respectively a planar mode and a DC mode.

公开(公告)号：US12177423B2

公开(公告)日：2024-12-24

申请号：US18538463

申请日：2023-12-13

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：US12170792B2

公开(公告)日：2024-12-17

申请号：US18396644

申请日：2023-12-26

Applicant: LG ELECTRONICS INC.

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

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

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 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.