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.

公开(公告)号：US20180316934A1

公开(公告)日：2018-11-01

申请号：US15769564

申请日：2016-10-19

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Eunyong SON ,  Jin HEO

IPC: H04N19/577 ,  H04N19/176 ,  H04N19/119 ,  H04N19/59 ,  H04N19/593

CPC classification number: H04N19/109 ,  H04N19/11 ,  H04N19/119 ,  H04N19/129 ,  H04N19/139 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/51

Abstract: Disclosed are a method for encoding/decoding an image and a device therefor. Specifically, a method whereby a decoding device decodes an image comprises: a step of parsing decoding order information for indicating the location of a next block to be decoded after a current block; and a step of determining the next block to be decoded after the current block, on the basis of the decoding order information, wherein the decoding order information indicates the relative location of the next block on the basis of the current block, and the next block can be selected as a block among predefined candidate blocks which can be decoded after the current block.

公开(公告)号：US20180309996A1

公开(公告)日：2018-10-25

申请号：US15768294

申请日：2016-10-13

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Sehoon YEA ,  Eunyong SON ,  Kyuwoon KIM ,  Jin HEO ,  Junghak NAM ,  Bumshik LEE

IPC: H04N19/13 ,  H04N19/14 ,  H04N19/157 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/11 ,  H04N19/14 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/70

Abstract: The present invention provides a method for encoding a video signal comprising the steps of: obtaining activity information from the video signal, wherein the activity signal indicates information relating to edge characteristics of an image and includes edge orientation information and/or edge level information; determining conditionally non-linear transform (CNT) configuration information on the basis of the activity information; and performing CNT prediction coding on the basis of the CNT configuration information, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.

公开(公告)号：US20180241995A1

公开(公告)日：2018-08-23

申请号：US15755037

申请日：2016-08-25

Applicant: LG ELECTRONICS INC.

Inventor： Eunyong SON ,  Jin HEO ,  Seungwook PARK ,  Yongjoon JEON ,  Moonmo KOO

IPC: H04N19/11 ,  H04N19/186 ,  H04N19/593 ,  H04N19/176

CPC classification number: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593

Abstract: An intra prediction method according to the present invention comprises the steps of: acquiring information on a luma prediction mode of a current block and information on a chroma prediction mode of the current block from a bit stream; deriving a luma intra prediction mode of the current block on the basis of the information on the luma prediction mode; determining a chroma intra prediction mode of the current block on the basis of information on the luma intra prediction mode and the information on the chroma prediction mode; and generating a chroma prediction sample of the current block on the basis of the chroma intra prediction mode. According to the present invention, it is possible to reflect the difference between the ratio of the width to the height of a luma component and the ratio of the width to the height of a chroma component, and thus to more accurately perform intra prediction in units of samples and improve intra prediction performance.