公开(公告)号：US11800114B2

公开(公告)日：2023-10-24

申请号：US17843531

申请日：2022-06-17

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Junghak Nam ,  Jaehyun Lim ,  Seunghwan Kim ,  Jungdong Seo ,  Jaeho Lee ,  Hyeongmoon Jang

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

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/503

Abstract: An image decoding method performed by a decoding apparatus includes the operations 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 based on 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 based on the scaled movement vector and location of the current block; and deriving a movement vector of the current block based on the updated movement vector.

公开(公告)号：US11729411B2

公开(公告)日：2023-08-15

申请号：US17831288

申请日：2022-06-02

Applicant: LG ELECTRONICS INC.

Inventor： Jaehyun Lim ,  Naeri Park ,  Jungdong Seo ,  Junghak Nam

IPC: H04N19/51 ,  H04N19/53 ,  H04N19/70 ,  H04N19/513 ,  H04N19/523 ,  H04N19/176

CPC classification number: H04N19/51 ,  H04N19/176 ,  H04N19/513 ,  H04N19/523 ,  H04N19/53 ,  H04N19/70

Abstract: Disclosed are an inter prediction mode-based image processing method and an apparatus therefor. Particularly, a method for processing an image on the basis of inter prediction may comprise the steps of: determining whether a motion vector scale adaptation is applied to a block; up-scaling a down-scaled MVD (Motion Vector Difference) when the motion vector scale adaptation is applied to the block; deriving a MV (Motion Vector) for the block, using the up-scaled MVD and a MVP (Motion Vector Predictor); and generating a predictive block of the block, using the derived MV.

公开(公告)号：US11190763B2

公开(公告)日：2021-11-30

申请号：US16913731

申请日：2020-06-26

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Jaeho Lee ,  Jangwon Choi ,  Jungdong Seo ,  Jin Heo

IPC: H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

Abstract: A method by which a decoding device performs image decoding, according to the present invention, comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring samples including left neighboring samples and upper neighboring samples of the current block; deriving reference samples for prediction of a target sample among the neighboring samples on the basis of the position of the target sample of the current block and the prediction angle of the intra prediction mode; determining an interpolation filter for the target sample; and deriving the prediction sample of the target sample on the basis of the interpolation filter and the reference samples.

公开(公告)号：US10757407B2

公开(公告)日：2020-08-25

申请号：US16591238

申请日：2019-10-02

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Jaeho Lee ,  Jangwon Choi ,  Jungdong Seo ,  Jin Heo

IPC: H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

Abstract: A method by which a decoding device performs image decoding, according to the present invention, comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring samples including left neighboring samples and upper neighboring samples of the current block; deriving reference samples for prediction of a target sample among the neighboring samples on the basis of the position of the target sample of the current block and the prediction angle of the intra prediction mode; determining an interpolation filter for the target sample; and deriving the prediction sample of the target sample on the basis of the interpolation filter and the reference samples.

公开(公告)号：US10750190B2

公开(公告)日：2020-08-18

申请号：US16340463

申请日：2017-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong Seo ,  Jaehyun Lim

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

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：US10742971B2

公开(公告)日：2020-08-11

申请号：US16339635

申请日：2017-07-10

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong Seo ,  Jaehyun Lim

IPC: H04N19/176 ,  H04N7/24 ,  H04N19/105 ,  H04N19/172 ,  H04N19/573 ,  H04N19/139

Abstract: A method for decoding an image by a decoding apparatus according to the present invention comprises the steps of: deriving first motion information of a current block in a first direction and second motion information of the current block in a second direction; deriving a first reference sample on the basis of the first motion information; deriving a second reference sample on the basis of the second motion information; deriving a first weight for the first reference sample and a second weight for the second reference sample; and generating a prediction sample of the current block by performing a weighted summation of the first and second reference samples on the basis of the first and second weights, wherein the first motion information comprises a first reference picture index and a first MV and the second motion information comprises a second reference picture index and a second MV.

公开(公告)号：US10735728B2

公开(公告)日：2020-08-04

申请号：US15767267

申请日：2016-09-22

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong Seo ,  Jaehyun Lim ,  Naeri Park

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/44 ,  H04N19/70 ,  H04N19/136

Abstract: Disclosed are a method for processing an image and an apparatus therefor. Specifically, a method for decoding an image comprises: a step of deriving an initial block size information indicating information in which a first block, which is a basic unit for dividing an image, is divided into one or more initial blocks; a step of deriving a division information indicating information in which the initial block is divided into a plurality of second blocks in the initial block unit divided from the first block based on the initial block size information; and a step of decoding in a second block unit recursively divided from the initial block based on the division information.

公开(公告)号：US20180288443A1

公开(公告)日：2018-10-04

申请号：US15764723

申请日：2016-09-09

Applicant: LG ELECTRONICS INC.

Inventor： Jaehyun Lim ,  Naeri Park ,  Jungdong Seo ,  Junghak Nam

IPC: H04N19/82 ,  H04N19/50 ,  H04N19/176

Abstract: An inter-prediction method performed by a decoding apparatus according to the present invention comprises the steps of: obtaining prediction related information from a bitstream; generating prediction samples by performing inter-prediction on a current block on the basis of the prediction related information; determining whether or not a Wiener filter is available for the current block; if the Wiener filter is available, generating a Wiener filter candidate list on the basis of neighboring blocks of the current block and deriving Wiener filter coefficients for the current block on the basis of a candidate block within the Wiener filter candidate list; and filtering the prediction samples on the basis of the derived Wiener filter coefficients. According to the present invention, an inter-prediction efficiency can be improved and coding efficiency can be improved.