公开(公告)号：US12047556B2

公开(公告)日：2024-07-23

申请号：US17431025

申请日：2020-02-20

Applicant: LG ELECTRONICS INC.

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

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

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

Abstract: A video decoding method according to the present document is characterized by comprising: obtaining Most Probable Mode (MPM) index information and reference line index information from a bitstream; compiling an MPM list including candidate intra prediction modes for the intra prediction of a current block; deriving an intra prediction mode for the current block from among the candidate intra prediction modes included in the MPM list on the basis of the MPM index information; generating prediction samples for the current block on the basis of the intra prediction mode; and generating reconstructed samples for the current block on the basis of the prediction samples, wherein the step for compiling the MPM list involves deriving a DC mode as one of the candidate intra prediction modes, and including the DC mode in the MPM list, the DC mode being derived on the basis of the value of reference line index information indicating a reference line used for the intra prediction of the current block not being zero.

公开(公告)号：US12022061B2

公开(公告)日：2024-06-25

申请号：US17639273

申请日：2020-08-31

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：US20240129534A1

公开(公告)日：2024-04-18

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

CPC classification number: H04N19/647 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91 ,  H04N19/513

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.

公开(公告)号：US11962767B2

公开(公告)日：2024-04-16

申请号：US17639264

申请日：2020-08-31

Applicant: LG Electronics Inc.

Inventor： Jangwon Choi ,  Junghak Nam

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/169 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/50 ,  H04N19/70 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/1883 ,  H04N19/50 ,  H04N19/70 ,  H04N19/80

Abstract: According to one embodiment of the present document, an in-loop filtering procedure in an image/video coding procedure may comprise a cross-component adaptive loop filtering procedure. CCALF, according to the present embodiment, can increase the accuracy of in-loop filtering.

公开(公告)号：US11924466B2

公开(公告)日：2024-03-05

申请号：US17677598

申请日：2022-02-22

Applicant: LG ELECTRONICS INC.

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

IPC: H04N11/02 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/30 ,  H04N19/593 ,  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：US11812019B2

公开(公告)日：2023-11-07

申请号：US17797849

申请日：2021-02-05

Applicant: LG ELECTRONICS INC.

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

IPC: H04N11/02 ,  H04N19/12 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/12 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/70

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: obtaining a dependent quantization available flag; obtaining a TSRC available flag, on the basis of the dependent quantization available flag; determining a residual coding syntax for a current block, on the basis of the TSRC available flag; obtaining residual information of the determined residual coding syntax for the current block; 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 dependent quantization available flag is a flag regarding whether dependent quantization is available, the TSRC available flag is a flag regarding whether TSRC is available, and the TSRC available flag is obtained on the basis of the dependent quantization available flag having a value of 0.

公开(公告)号：US11683495B2

公开(公告)日：2023-06-20

申请号：US17879686

申请日：2022-08-02

Applicant: LG ELECTRONICS INC.

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

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

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：US11683480B2

公开(公告)日：2023-06-20

申请号：US17740712

申请日：2022-05-10

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：US11677955B2

公开(公告)日：2023-06-13

申请号：US17419650

申请日：2020-01-13

Applicant: LG Electronics Inc.

Inventor： Jungah Choi ,  Jaehyun Lim ,  Jin Heo ,  Sunmi Yoo ,  Ling Li ,  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 by which a decoding device decodes an image, according to the present document, comprises the steps of: receiving a bitstream including residual information about a current block; decoding syntax elements for the current block included in the residual information; deriving conversion coefficients for the current block on the basis of the decoded syntax elements; deriving residual samples for the current block on the basis of the conversion coefficients; and generating a restoration picture on the basis of the residual samples.

公开(公告)号：US11659205B2

公开(公告)日：2023-05-23

申请号：US17537813

申请日：2021-11-30

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

CPC classification number: H04N19/647 ,  H04N19/124 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91 ,  H04N19/513 ,  H04N19/619 ,  H04N19/64

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.