公开(公告)号：US20210218959A1

公开(公告)日：2021-07-15

申请号：US17152123

申请日：2021-01-19

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Jaehyun LIM ,  Jin HEO

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/119 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159

Abstract: Disclosed are an intra-prediction mode-based image processing method and a device therefor. Particularly, a method for processing an image on the basis of an intra-prediction mode may comprise the steps of: configuring a reference sample to be used for prediction of a current block on the basis of width information and height information of the current block when the current block is a non-square block; deriving an intra-prediction mode of the current block; and generating a prediction sample of the current block by using the reference sample on the basis of the intra-prediction mode of the current block.

公开(公告)号：US20210176480A1

公开(公告)日：2021-06-10

申请号：US17180474

申请日：2021-02-19

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Seunghwan KIM ,  Sunmi YOO ,  Ling LI ,  Jungah CHOI

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/105 ,  H04N19/136

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：US20210176461A1

公开(公告)日：2021-06-10

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 ,  H04N19/70 ,  H04N19/132 ,  H04N19/159 ,  H04N19/46 ,  H04N19/176

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：US20210076028A1

公开(公告)日：2021-03-11

申请号：US16982411

申请日：2019-03-27

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method according to the present invention comprises: obtaining, from a bitstream, information relating to the intra prediction type of a current block, information relating to the intra prediction mode of the current block, and residual information of the current block; performing intra prediction based on of the information relating to the intra prediction type and the information relating to the intra prediction mode; performing residual processing based on of the residual information; and reconstructing the current block based on of a result of the intra prediction and a result of the residual processing, wherein when the intra prediction type indicates a particular intra prediction type, the information relating to the intra prediction mode includes an MPM index, and when the intra prediction type indicates the particular intra prediction type, the MPM index is parsed without parsing of an MPM flag from the bitstream.

公开(公告)号：US20200304780A1

公开(公告)日：2020-09-24

申请号：US16868768

申请日：2020-05-07

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jaehyun LIM ,  Jin HEO ,  Jangwon CHOI ,  Seunghwan KIM

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

Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure includes receiving intra prediction information including at least one of most probable mode (MPM) flag information representing whether to derive an intra prediction mode for a current block based on MPM candidates for the current block or planar flag information representing whether to determine the intra prediction mode for the current block as a planar mode, deriving the intra prediction mode for the current block based on the MPM flag information and the planar flag information, deriving a predicted block for the current block based on the intra prediction mode for the current block, and generating a reconstructed picture based on the predicted block.

公开(公告)号：US20200244954A1

公开(公告)日：2020-07-30

申请号：US16837857

申请日：2020-04-01

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Seunghwan KIM ,  Llng Li

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/132 ,  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：US20200068195A1

公开(公告)日：2020-02-27

申请号：US16610829

申请日：2018-02-05

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Seunghwan KIM ,  Jin HEO ,  Seethal PALURI

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/129 ,  H04N19/593

Abstract: A prediction method according to the present invention comprises the steps of: deriving a prediction block on the basis of an intra prediction mode; deriving transform coefficients of the prediction block by applying transformation to the prediction block; applying frequency domain filtering to the transform coefficients of the prediction block; and generating a modified prediction block by applying inverse transformation on modified transform coefficients derived through the frequency domain filtering, wherein prediction performance can be improved thereby and the amount of data required for residual coding can be reduced.

公开(公告)号：US20200021800A1

公开(公告)日：2020-01-16

申请号：US16508658

申请日：2019-07-11

Applicant: LG ELECTRONICS INC.

Inventor： Seunghwan KIM ,  Sunmi YOO ,  Ling LI ,  Jaehyun LIM ,  Jangwon CHOI ,  Jungah CHOI ,  Jin HEO

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/46 ,  H04N19/159

Abstract: According to the present disclosure, a video decoding method performed by a video decoding device includes parsing remaining intra prediction mode information for a current block, deriving neighboring samples of the current block, deriving MPM list including MPM candidates of the current block, deriving an intra prediction mode of the current block based on the remaining intra prediction mode information, wherein the intra prediction mode is one of remaining intra prediction modes excluding the MPM candidates, deriving a prediction sample of the current block based on the intra prediction mode and the neighboring samples, and deriving a reconstructed picture based on the prediction sample, wherein the remaining intra prediction mode information is coded through a truncated binary (TB) binarization process, and wherein a binarization parameter for the TB binarization process is 60.

公开(公告)号：US20190222839A1

公开(公告)日：2019-07-18

申请号：US16337125

申请日：2017-09-25

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Jin HEO

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

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593

Abstract: A method and a device for processing an intra prediction mode based video are disclosed. More specifically, a method for processing a video based on an intra-prediction mode may include determining a left prediction mode and an upper prediction mode using a prediction mode of a block neighboring a current block, wherein the left prediction mode and the upper prediction mode are determined based on a split structure of the block neighboring the current block; constructing a most probable mode (MPM) candidate list of the current block using the left prediction mode and the upper prediction mode; determining a prediction mode of the current block using a MPM index indicating a specific prediction mode in the MPM candidate list; and generating a prediction block of the current block using the prediction mode of the current block.

公开(公告)号：US20190141317A1

公开(公告)日：2019-05-09

申请号：US16096194

申请日：2017-02-08

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Bumshik LEE

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/91

Abstract: An image decoding method performed by a decoding device according to the present invention comprises the steps of: deriving an intra prediction mode for a current PU on the basis of a received bit stream; and performing reconstruction of a plurality of TUs located in an area of the current PU on the basis of the intra prediction mode, wherein the step of performing reconstruction comprises, with respect to a current block that is one of the plurality of TUs, a step of deriving a prediction sample of the current block on the basis of a first reference sample located in a prediction direction of the intra prediction mode and a second reference sample located in an opposite direction of the prediction direction, and a step of reconstructing a block to be reconstructed on the basis of the prediction sample.