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：US11445189B2

公开(公告)日：2022-09-13

申请号：US17472137

申请日：2021-09-10

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Jin Heo ,  Moonmo Koo ,  Jung Hak Nam

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include determining whether a prediction mode of a current block is an intra prediction mode based on information on the prediction mode of the current block, determining whether intra sub-partitions (ISP) is available for the current block, when the prediction mode of the current block is an intra prediction mode, decoding an ISP application indicator indicating whether to apply ISP to the current block, when ISP is available for the current block, and generating a prediction block for the current block by applying ISP to the current block, upon determining that ISP applies to the current block based on the ISP application indicator.

公开(公告)号：US11431985B2

公开(公告)日：2022-08-30

申请号：US17475104

申请日：2021-09-14

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Jaehyun Lim ,  Jin Heo ,  Junghak Nam

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/82 ,  H04N19/159 ,  H04N19/96 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: receiving a bitstream including prediction information for a current block; deriving a chroma array type for the current block on the basis of a separate color plane flag indicating whether three color components are separately coded and a chroma format index indicating a chroma format sampling structure for the current block, which are included in the prediction information for the current block; deriving prediction samples for the current block on the basis of the derived chroma array type; and deriving reconstructed samples for the current block on the basis of the prediction samples.

公开(公告)号：US20220232214A1

公开(公告)日：2022-07-21

申请号：US17675716

申请日：2022-02-18

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/18 ,  H04N19/176 ,  H04N19/70 ,  H04N19/46

Abstract: An image decoding method carried out by a decoding apparatus according to the present document comprises the steps of: acquiring, via a bitstream, image data comprising residual data, and prediction mode data for the current block; deriving the prediction mode of the current block on the basis of the prediction mode data; deriving prediction samples for the current block on the basis of the prediction mode; deriving residual samples for the current block on the basis of the residual data; and generating reconstructed samples for the current block on the basis of the prediction samples and residual samples.

公开(公告)号：US20220174275A1

公开(公告)日：2022-06-02

申请号：US17667957

申请日：2022-02-09

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Seunghwan Kim ,  Jin Heo

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/593 ,  H04N19/176 ,  H04N19/46 ,  H04N19/132 ,  H04N19/186

Abstract: A method for image decoding performed by a decoding device according to the present document comprises the steps of: deriving a specific value for a current chroma block; when a width and a height of the current chroma block have a value equal to or greater than the specific value, deriving upper peripheral chroma samples of a number equal to the specific value of the current chroma block and left peripheral chroma samples of a number equal to the specific value; deriving CCLM parameters on the basis of the upper peripheral chroma samples, the left peripheral chroma samples, and down-sampled peripheral luma samples; and deriving prediction samples for the current chroma block on the basis of the down-sampled luma samples and the CCLM parameters, wherein the derived specific value is 2.

公开(公告)号：US20220124370A1

公开(公告)日：2022-04-21

申请号：US17562227

申请日：2021-12-27

Applicant: LG Electronics Inc.

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

IPC: H04N19/60 ,  H04N19/132 ,  H04N19/176 ,  H04N19/184 ,  H04N19/70

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：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：US11140415B2

公开(公告)日：2021-10-05

申请号：US16763091

申请日：2018-11-30

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: The present invention relates to a method for decoding a bitstream for a video signal and a device therefor, the method comprising the steps of: acquiring a value indicating the similarity between reference samples for intra prediction of a current block; determining an intra prediction mode of the current block on the basis of the acquired value and a predetermined threshold value; and reconstructing the current block on the basis of the determined intra prediction mode, wherein the step of determining the intra prediction mode of the current block comprises: when the value indicating the similarity is smaller than the predetermined threshold value, acquiring index information from the bitstream; preparing a list of candidate modes on the basis of intra prediction modes of blocks neighboring the current block, without acquiring flag information indicating whether the intra prediction mode of the current block is derived from the blocks neighboring the current block; and determining, as the intra prediction mode of the current block, a candidate mode that is indicated by the index information among the candidate modes in the prepared list.

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.