公开(公告)号：US11582482B2

公开(公告)日：2023-02-14

申请号：US17299630

申请日：2019-11-27

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/186

Abstract: An image decoding method according to the present document includes: a step for deriving a luma intra prediction mode; and a step for generating a chroma candidate mode list for a chroma block including a preset number of chroma intra candidates by using at least one among a DM, a planar mode, a DC mode, a vertical mode, a horizontal mode, and an up-right diagonal mode, which are derived from the luma intra prediction mode, wherein the DM is a prediction mode corresponding to a center (CR) position of the luma block, and the chroma intra candidates other than the DM can be derived through a duplicate check of the DM and a prediction mode corresponding to any one among the top left (TL), top right (TR), bottom left (BL), and bottom right (BR) of the luma block, the planar mode, the DC mode, the vertical mode, and the horizontal mode.

公开(公告)号：US11523134B2

公开(公告)日：2022-12-06

申请号：US17612186

申请日：2020-05-22

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Junghak Nam ,  Jungah Choi

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/593 ,  H04N19/159

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: acquiring a block-based delta pulse code modulation (BDPCM) flag for a current block; on the basis of the BDPCM flag indicating that BDPCM is applied to the current block, acquiring a BDPCM direction flag for the current block; and storing, as an intra-prediction mode of the current block, an intra-prediction mode of a prediction direction derived on the basis of the BDPCM direction flag.

公开(公告)号：US11490125B2

公开(公告)日：2022-11-01

申请号：US17673201

申请日：2022-02-16

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring syntax elements for a first transform coefficient through an n-th transform coefficient of a current block, wherein the syntax elements are syntax elements according to a first residual data coding structure of TSRC; and acquiring syntax elements for an n+1st transform coefficient through a last transform coefficient of the current block, wherein the syntax elements are syntax elements according to a second residual data coding structure of the TSRC, wherein the number of context-coded syntax elements for the first transform coefficient through the n-th transform coefficient is equal to the maximum number of context-coded bins of the current block, and the syntax elements according to the second residual data coding structure include coefficient level information and a sign flag for a transform coefficient.

公开(公告)号：US11490088B2

公开(公告)日：2022-11-01

申请号：US17365559

申请日：2021-07-01

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/129 ,  H04N19/176 ,  H04N19/46

Abstract: A method for decoding an image by a decoding device according to the present disclosure comprises the steps of: receiving a bit stream including residual information; deriving a quantized conversion factor of a current block on the basis of the residual information included in the bit stream; deriving a residual sample of the current block on the basis of the quantized conversion factor; and generating a reconstructed picture on the basis of the residual sample of the current block.

公开(公告)号：US11470305B2

公开(公告)日：2022-10-11

申请号：US17179639

申请日：2021-02-19

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: 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：US11451785B2

公开(公告)日：2022-09-20

申请号：US17674595

申请日：2022-02-17

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

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：US11245904B2

公开(公告)日：2022-02-08

申请号：US17217739

申请日：2021-03-30

Applicant: LG ELECTRONICS INC.

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

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

Abstract: A method by which a decoding device decodes an image includes the steps of: 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 a transform block.

公开(公告)号：US20210321135A1

公开(公告)日：2021-10-14

申请号：US17357051

申请日：2021-06-24

Applicant: LG Electronics Inc.

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

IPC: H04N19/61 ,  H04N19/186 ,  H04N19/176 ,  H04N19/159

Abstract: An image decoding method according to the present document comprises the steps of: acquiring prediction mode information and residual related information from a bitstream; deriving, on the basis of the prediction mode information, prediction samples of a current block by performing prediction; deriving residual samples of the current block on the basis of the residual related information; and generating restoration samples of the current block on the basis of the prediction samples and the residual samples, and determines whether the residual related information includes a transform skip flag on the basis of whether the current block is a luminance component block or a chrominance component block, wherein the transform skip flag represents whether a transform skip is applied to the current block.

公开(公告)号：US20210168370A1

公开(公告)日：2021-06-03

申请号：US17169899

申请日：2021-02-08

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

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：US20210136418A1

公开(公告)日：2021-05-06

申请号：US17148970

申请日：2021-01-14

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

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.