公开(公告)号：US20220103808A1

公开(公告)日：2022-03-31

申请号：US17547151

申请日：2021-12-09

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Naeri Park ,  Junghak Nam

IPC: H04N19/105 ,  H04N19/137 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: According to the disclosure of this document, in subblock-based temporal motion vector prediction (sbTMVP), a subblock position for deriving a motion vector in units of a subblock can be efficiently calculated, and through this, video/image coding efficiency can be improved and hardware implementation can be simplified.

公开(公告)号：US20220007008A1

公开(公告)日：2022-01-06

申请号：US17472101

申请日：2021-09-10

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: According to the disclosure of the present document, when the inter prediction type of a current block indicates biprediction, weight index information for candidates in a merge candidate list or a sub-block merge candidate list can be induced or derived, and coding efficiency can be increased.

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：US20210203940A1

公开(公告)日：2021-07-01

申请号：US17187517

申请日：2021-02-26

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Jaehuyn Lim

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/117 ,  H04N19/11 ,  H04N19/44 ,  H04N19/593 ,  H04N19/96

Abstract: Disclosed are an image coding/decoding method and an apparatus therefor. Specifically, a method for decoding an image by a decoding apparatus may include: deriving an intra prediction mode of a current block; configuring reference samples with samples neighboring to an upper end and samples neighboring to a left side of the current block; generating a prediction block of the current block by using the reference sample; and filtering a sample adjacent to a top boundary and/or a left boundary of the current block among the prediction samples, in which when the current block is a non-square block, whether to filter the sample adjacent to the top boundary of the current block may be determined by considering only a width of the current block and whether to filter the sample adjacent to the left boundary of the current block may be determined by considering only a height of the current block.

公开(公告)号：US20210006798A1

公开(公告)日：2021-01-07

申请号：US16943908

申请日：2020-07-30

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/137 ,  H04N19/105

Abstract: Disclosed herein are a method for decoding a video signal and a device therefor. Specifically, a method for decoding an image based on an inter prediction mode may include: if a merge mode is applied to a current block, generating a merge candidate list by using a spatial neighboring block and a temporal neighboring block of the current block; obtaining a merge index indicating a candidate to be used for an inter prediction of the current block in the merge candidate list; deriving a motion vector of each of subblocks included in the current block based on a motion vector of the candidate used for the inter prediction of the current block; and generating a prediction sample of the current block by using the motion vector of each of subblocks.

公开(公告)号：US20200314445A1

公开(公告)日：2020-10-01

申请号：US16861579

申请日：2020-04-29

Applicant: LG Electronics Inc.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/577

Abstract: A video decoding method according to this disclosure includes: deriving an L0 motion vector and an L1 motion vector for a current block; deriving a refined L0 motion vector and a refined L1 motion vector, by applying DMVR to the current block based on DMVR flag information; deriving L0 prediction samples of the current block based on the refined L0 motion vector and L1 prediction samples of the current block based on the refined L1 motion vector; deriving prediction samples for the current block based on the L0 prediction samples and the L1 prediction samples, by applying BDOF to the current block based on BDOF flag information; and generating reconstruction samples for the current block based on the prediction samples, in which the DMVR flag information is derived based on a predetermined DMVR application condition, and the BDOF flag information is derived based on a predetermined BDOF application condition.

公开(公告)号：US20200236361A1

公开(公告)日：2020-07-23

申请号：US16632211

申请日：2018-07-18

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/117 ,  H04N19/159 ,  H04N19/46 ,  H04N19/176

Abstract: Disclosed herein are an intra prediction mode based image processing method and an apparatus therefor. Specifically, a method for processing an image based on an intra prediction mode may include: generating a first prediction sample and a second prediction sample using a reference sample adjacent to a current block; generating a final prediction sample of the current block by performing a weighted addition of the first and second prediction samples; and reconstructing the current block by adding the final prediction sample to a residual sample of the current block.

公开(公告)号：US20200221077A1

公开(公告)日：2020-07-09

申请号：US16644442

申请日：2018-03-19

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG ,  Jungdong SEO ,  Jaeho LEE

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

Abstract: In the present disclosure, an inter prediction mode based image processing method and an apparatus therefor are disclosed. Specifically, a method of processing an image on the basis of an inter prediction mode may comprise a step of forming a plurality of candidate groups by checking merge candidates according to a predetermined order; a step of extracting a group index indicating a specific candidate group among the plurality of candidate groups; a step of extracting a merge index indicating the specific merge candidate in the candidate group indicated by the group index; and a step of generating a prediction block of a current block using motion information of the merge candidate indicated by the merge index.

公开(公告)号：US20200045307A1

公开(公告)日：2020-02-06

申请号：US16339932

申请日：2017-09-29

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/70 ,  H04N19/119 ,  H04N19/513

Abstract: The present invention discloses an inter prediction mode-based image processing method and a device for the method. More specifically, the inter prediction mode-based image processing method comprises deriving backward motion information of a current block by using motion information of a block within a reference picture of a current picture; adding the backward motion information to a motion information candidate list of the current block; deriving motion information of the current block from motion information selected from motion information candidate added to the motion information candidate list; and generating a prediction block of the current block by using motion information of the current block, wherein a block within the reference picture is specified by the backward motion information.

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.