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.

公开(公告)号：US10999591B2

公开(公告)日：2021-05-04

申请号：US16618632

申请日：2018-01-03

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/147 ,  H04N19/172

Abstract: The present disclosure provides a method for processing a video signal through target modification, the method comprising the steps of: acquiring a target modification flag from a sequence parameter set of the video signal, wherein the target modification flag indicates whether a modification is performed on a target region; if the modification is performed on the target region according to the target modification flag, acquiring a target modification index, wherein the target modification index indicates a target modification scheme which corresponds to a non-modification, a left-right symmetric modification, an up-down symmetric modification, a rotation modification, or a combination thereof; identifying a target modification scheme which corresponds to the target modification index; and performing an inverse-modification on a reconstructed target region, according to the identified target modification scheme.

公开(公告)号：US10951898B2

公开(公告)日：2021-03-16

申请号：US16709471

申请日：2019-12-10

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/176 ,  H04N19/13 ,  H04N19/60 ,  H04N19/124 ,  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：US12231633B2

公开(公告)日：2025-02-18

申请号：US18520912

申请日：2023-11-28

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Jangwon Choi

IPC: H04N19/00 ,  H04N19/117 ,  H04N19/132 ,  H04N19/169 ,  H04N19/186 ,  H04N19/46 ,  H04N19/80

Abstract: According to one embodiment of the present document, a cross component adaptive loop filtering (CCALF) process may be performed. The CCALF process can enhance the filtering performance for chroma components and improve the subjective/objective image quality of a picture.

公开(公告)号：US12219157B2

公开(公告)日：2025-02-04

申请号：US18596372

申请日：2024-03-05

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：US12219132B2

公开(公告)日：2025-02-04

申请号：US18525025

申请日：2023-11-30

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon Choi ,  Jin Heo ,  Sunmi Yoo ,  Jungah Choi ,  Seung Hwan Kim

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/136 ,  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 identifying a prediction mode of a current block, determining a candidate intra prediction mode for the current block, based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block being an intra prediction mode, generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode, and determine an intra prediction mode of the current block based on the candidate intra prediction mode list. In this case, the candidate intra prediction mode may be determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode.

公开(公告)号：US20250039382A1

公开(公告)日：2025-01-30

申请号：US18917598

申请日：2024-10-16

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/122 ,  H04N19/136 ,  H04N19/176 ,  H04N19/196

Abstract: A method for decoding a picture performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information, deriving a quantized transform coefficient for a current block based on the residual information included in the bitstream, deriving a transform coefficient from the quantized transform coefficient based on a dequantization process, deriving a residual sample for the current block by applying an inverse transform to the derived transform coefficient, and generating a reconstructed picture based on the residual sample for the current block.