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：US10951908B2

公开(公告)日：2021-03-16

申请号：US16615329

申请日：2017-11-27

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Jaehyun Lim ,  Jin Heo

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/11 ,  H04N19/182

Abstract: According to the present disclosure, an image decoding method performed by a decoding device comprises the steps of: deriving a first intra prediction mode of a current block; deriving neighboring samples including left neighboring samples and upper neighboring samples of the current block; deriving a second intra prediction mode of a target sample on the basis of a location of the target sample and the first intra prediction mode of the current block; and performing prediction for the target sample on the basis of the second intra prediction mode of the target sample.

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：US10931943B2

公开(公告)日：2021-02-23

申请号：US16805231

申请日：2020-02-28

Applicant: LG ELECTRONICS INC.

Inventor： Ling Li ,  Jin Heo ,  Seunghwan Kim

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

Abstract: A video decoding method according to this document includes deriving a first candidate intra prediction mode based on a first neighboring block located on a left side of a current block, deriving a second candidate intra prediction mode based on a second neighboring block located on an upper side of the current block, constructing a most probable mode (MPM) list for 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, 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：US10856001B2

公开(公告)日：2020-12-01

申请号：US15553078

申请日：2016-02-15

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Sehoon Yea ,  Eunyong Son ,  Jin Heo

IPC: H04N19/513 ,  H04N19/96 ,  H04N19/17 ,  H04N19/14 ,  H04N19/119 ,  H04N19/70 ,  H04N19/52 ,  H04N19/537 ,  H04N19/132 ,  H04N19/176 ,  H04N19/103 ,  H04N19/117 ,  H04N19/124

Abstract: A polygon unit-based image processing method, and a device for the same are disclosed. Specifically, a method for decoding an image on the basis of a polygon unit can comprise the steps of: deriving a motion vector predictor for a polygon apex forming the polygon unit; deriving a motion vector for the polygon apex on the basis of a motion vector difference for the polygon apex and the motion vector predictor; and deriving a prediction sample for the polygon unit from a division unit, which is specified by the motion vector, in a reference picture.

公开(公告)号：US10812795B2

公开(公告)日：2020-10-20

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 ,  H04N19/463

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：US10674146B2

公开(公告)日：2020-06-02

申请号：US15764685

申请日：2016-09-30

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Eunyong Son ,  Jaeho Lee ,  Seungwook Park ,  Sehoon Yea ,  Junghak Nam

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/124 ,  H04N19/44 ,  H04N19/90 ,  H04N19/119 ,  H04N19/129 ,  H04N19/70 ,  H04N19/14 ,  H04N19/18 ,  H04N19/61

Abstract: An image decoding method according to the present invention comprises the steps of: deriving quantized transform coefficients by unit of sub-blocks in a transform unit on the basis of residual information included in a bitstream; deriving transform coefficients on the basis of the quantized transform coefficients; generating a residual sample on the basis of the transform coefficients; generating a prediction sample on the basis of an inter prediction or an intra prediction; and restoring an image on the basis of the residual sample and the prediction sample. According to the present invention, a quantity of data required for a residual signal can be reduced, and an overall coding efficiency can be improved.

公开(公告)号：US10609374B2

公开(公告)日：2020-03-31

申请号：US15777847

申请日：2016-11-22

Applicant: LG ELECTRONICS INC.

Inventor： Junghak Nam ,  Jin Heo ,  Seungwook Park

IPC: H04N19/13 ,  H04N19/91 ,  H04N19/176 ,  H04N19/70 ,  H04N19/174 ,  H04N19/149

Abstract: The present invention provides a method of performing an entropy decoding for a video signal including obtaining a context model initial value for a current slice; calculating a probability value based on syntax statistics of a previous slice; deriving weighted values corresponding to the context model initial value for the current slice and the syntax statistics of the previous slice; and updating the context model initial value for the current slice using the weighted values.

公开(公告)号：US10574984B2

公开(公告)日：2020-02-25

申请号：US15758967

申请日：2016-08-25

Applicant: LG ELECTRONICS INC.

Inventor： Eunyong Son ,  Seungwook Park ,  Yongjoon Jeon ,  Jin Heo ,  Moonmo Koo ,  Sunmi Yoo

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/82

Abstract: An intra prediction method includes the steps of: acquiring intra prediction mode information from a bitstream; deriving neighboring samples of a current block; determining an intra prediction mode for the current block on the basis of the intra prediction mode information; deriving a prediction sample of the current block on the basis of the intra prediction mode and the neighboring samples; determining filtering reference samples for the prediction sample on the basis of the intra prediction mode; and deriving a filtered prediction sample by applying filtering to the prediction sample on the basis of the filtering reference samples. According to the present invention, a prediction sample can be adaptively filtered according to the intra prediction mode, and intra prediction performance can be improved.

公开(公告)号：US20180288409A1

公开(公告)日：2018-10-04

申请号：US15764685

申请日：2016-09-30

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Eunyong Son ,  Jaeho Lee ,  Seungwook PARK ,  Sehoon Yea ,  Junghak Nam

IPC: H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/44 ,  H04N19/61 ,  H04N19/18

CPC classification number: H04N19/105 ,  H04N19/119 ,  H04N19/124 ,  H04N19/129 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/44 ,  H04N19/61 ,  H04N19/70 ,  H04N19/90

Abstract: An image decoding method according to the present invention comprises the steps of: deriving quantized transform coefficients by unit of sub-blocks in a transform unit on the basis of residual information included in a bitstream; deriving transform coefficients on the basis of the quantized transform coefficients; generating a residual sample on the basis of the transform coefficients; generating a prediction sample on the basis of an inter prediction or an intra prediction; and restoring an image on the basis of the residual sample and the prediction sample. According to the present invention, a quantity of data required for a residual signal can be reduced, and an overall coding efficiency can be improved.