公开(公告)号：US20200053364A1

公开(公告)日：2020-02-13

申请号：US16340463

申请日：2017-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong SEO ,  Jaehyun LIM

IPC: H04N19/176 ,  H04N19/85 ,  H04N19/70

Abstract: According to the present invention, a method by which a decoding device performs video decoding comprises the steps of: parsing a merge index of a current block; configuring a merge candidate list on the basis of neighboring blocks; selecting a merge candidate indicated by the merge index among merge candidates included in the merge candidate list; deriving L0 motion information and L1 motion information of the current block on the basis of the selected merge candidate; deriving an L0 weight and an L1 weight of the current block; and generating a prediction sample of the current block by weighted-summing an L0 reference sample and an L1 reference sample on the basis of the L0 weight and the L1 weight.

公开(公告)号：US20190356922A1

公开(公告)日：2019-11-21

申请号：US16476003

申请日：2017-04-25

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Jaehyun LIM ,  Seunghwan KIM ,  Jungdong SEO ,  Jaeho LEE ,  Hyeongmoon JANG

IPC: H04N19/139 ,  H04N19/109 ,  H04N19/503 ,  H04N19/176 ,  H04N19/105

Abstract: An image decoding method carried out by a decoding apparatus according to the present invention comprises the steps of: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block on the basis of a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated on the basis of the scaled movement vector and location of the current block; and deriving a movement vector of the current block on the basis of the updated movement vector.

公开(公告)号：US20190342545A1

公开(公告)日：2019-11-07

申请号：US16345604

申请日：2016-10-28

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Naeri PARK ,  Jungdong SEO

IPC: H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/59 ,  H04N19/124 ,  H04N19/18

Abstract: Disclosed is a method for processing an image based on an intra prediction mode and an apparatus for the same. Particularly, the method may include generating a prediction sample of a sub sampled block in a current block based on an intra prediction mode of the current block; deriving a residual sample of the sub sampled block; reconstructing the sub sampled block by adding the prediction sample to the residual sample; and reconstructing the current block by merging the reconstructed the sub sampled blocks.

公开(公告)号：US20190297343A1

公开(公告)日：2019-09-26

申请号：US16465895

申请日：2016-12-05

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong SEO ,  Jaehyun LIM

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/44 ,  H04N19/119

Abstract: An image decoding method performed by a decoding device according to the present invention comprises the steps of: acquiring information on inter prediction of a target block through a bit stream; deriving motion information of the target block on the basis of the information on inter prediction; deriving a prediction sample by performing inter prediction for the target block on the basis of the motion information; generating a reconstruction block on the basis of the prediction sample; deriving modified motion information of the target block on the basis of the reconstruction block; and updating the motion information of the target block on the basis of the modified motion information. According to the present invention, modified motion information of the target block can be calculated, and the motion information of the target block can be updated on the basis of the modified motion information, so that the overall coding efficiency can be improved.

公开(公告)号：US20190281286A1

公开(公告)日：2019-09-12

申请号：US16347422

申请日：2016-11-07

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Jungdong SEO ,  Jaehyun LIM ,  Junghak NAM

IPC: H04N19/105 ,  H04N19/117 ,  H04N19/46 ,  H04N19/159 ,  H04N19/13 ,  H04N19/44 ,  H04N19/176

Abstract: According to the present invention, an image decoding method performed by a decoding device comprises the steps of: generating a first prediction block and a second prediction block of a current block; selecting a prediction block, to which a Wiener filter is to be applied, among the first prediction block and the second prediction block; deriving Wiener filter coefficients of the selected prediction block based on the first prediction block and the second prediction block; filtering the selected prediction block based on the derived Wiener filter coefficients; and generating a reconstructed block of the current block based on the filtered prediction block. According to the present invention, the overall coding efficiency can be improved by minimizing the difference between prediction blocks.

公开(公告)号：US20180352247A1

公开(公告)日：2018-12-06

申请号：US15761665

申请日：2016-08-25

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Jaehyun LIM ,  Jungdong SEO ,  Junghak NAM

IPC: H04N19/513

CPC classification number: H04N19/513 ,  H04N19/52 ,  H04N19/573 ,  H04N19/577

Abstract: An inter prediction method performed by a decoding apparatus according to the present invention comprises the steps of: receiving information associated with an MVD through a bit stream; deriving a candidate motion information list on the basis of a neighboring block of a current block; deriving an MVP of the current block on the basis of the candidate motion information list; deriving a motion vector of the current block on the basis of the MVP and the MVD; and generating a prediction sample with respect to the current block on the basis of the motion vector. According to the present invention, a motion vector may be derived on the basis of a candidate motion information list derived on the basis of a neighboring block. Therefore, the amount of data of prediction mode information can be reduced and inter prediction accuracy and overall coding efficiency can be improved.

公开(公告)号：US20180242004A1

公开(公告)日：2018-08-23

申请号：US15754220

申请日：2015-12-04

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Jungdong SEO

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/107 ,  H04N19/52 ,  H04N19/176 ,  H04N19/182

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/107 ,  H04N19/176 ,  H04N19/182 ,  H04N19/503 ,  H04N19/513 ,  H04N19/52 ,  H04N19/537 ,  H04N19/573

Abstract: Disclosed are an inter prediction mode-based image processing method and apparatus therefor. Particularly, a method for processing an image on the basis of inter prediction may comprise the steps of: adjusting a motion vector of a current block on the basis of a ratio of a difference between a current picture's picture order count (POC) and a first reference picture's POC to a difference between the current picture's POC and a second reference picture's POC; and deriving a predictor for each pixel in the current block by applying pixel unit-based inter prediction to each pixel of the current block on the basis of the adjusted motion vector of the current block.