公开(公告)号：US20210274205A1

公开(公告)日：2021-09-02

申请号：US17258659

申请日：2019-07-15

Applicant: LG ELECTRONICS INC.

Inventor： Naeri PARK ,  Junghak NAM

IPC: H04N19/44 ,  H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/46 ,  H04N19/176

Abstract: The picture decoding method by a decoding device, according to one embodiment of the present invention, comprises the steps of: deriving a motion vector for a neighboring merge candidate block from among neighboring merge candidate blocks of a current block, if a merge mode is applied to the current block, deriving a reference block in a reference picture indicated by the motion vector for the neighboring merge candidate block, deriving a refinement block having the minimal SAD with the current block, from among refinement candidate blocks within the search range of the reference block, if DMVR is applied to the current block, deriving prediction samples for the current block on the basis of a refinement motion vector for the derived refinement block, and generating restoration samples for the current block on the basis of the prediction samples.

公开(公告)号：US20210120265A1

公开(公告)日：2021-04-22

申请号：US17124041

申请日：2020-12-16

Applicant: LG ELECTRONICS INC.

Inventor： Jaeho LEE ,  Junghak NAM

IPC: H04N19/52 ,  H04N19/139 ,  H04N19/176 ,  H04N19/157

Abstract: A method for processing a video signal using an affine motion prediction is disclosed. The method includes checking that a current block is encoded by the affine motion prediction, obtaining motion vectors for a plurality of control points of the current block, determining a motion vector for each of a plurality of subblocks included in the current block based on the motion vectors for the plurality of control points, and performing a prediction for the current block from the motion vector for each of the plurality of subblocks, wherein each of the plurality of subblocks is configured to have a pre-defined width and a pre-defined height.

公开(公告)号：US20200267414A1

公开(公告)日：2020-08-20

申请号：US16651979

申请日：2018-07-02

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Jaehyun LIM

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/192

Abstract: A filtering method by a decoding device according to the present invention comprises the steps of: receiving information relating to ALF control depth; deciding an ALF control unit on the basis of information relating to the division depth and the ALF control depth of a current block in a restoration picture with respect to a current picture; determining whether or not ALF is applied to the current block in an ALF control unit level; and, if the ALF is determined to be applied to the current block, performing the ALF for the current block. In the filtering method, the current picture is recursively divided on the basis of a QTBT structure, and the current block is one of blocks divided on the basis of the QTBT structure.

公开(公告)号：US20200260072A1

公开(公告)日：2020-08-13

申请号：US16818677

申请日：2020-03-13

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/423 ,  H04N19/533 ,  H04N19/70

Abstract: According to an embodiment disclosed in the present specification, a history-based motion vector prediction (HMVP) candidate set with respect to a current block may be derived based on a history, the HMVP candidate set may be updated or initialized according to a condition, and motion information of the current block may be derived based on the HMVP candidate set, through which inter prediction efficiency can be improved.

公开(公告)号：US20200084455A1

公开(公告)日：2020-03-12

申请号：US16677100

申请日：2019-11-07

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Yongjoon JEON ,  Sunmi YOO ,  Eunyong SON ,  Junghak NAM

IPC: H04N19/159 ,  H04N19/593 ,  H04N19/119 ,  H04N19/107 ,  H04N19/176

Abstract: In the present invention, a method for processing an image on the basis of an intra prediction mode and an apparatus therefor are disclosed. Particularly, the method for processing an image on the basis of an intra prediction mode may comprise the steps of: partitioning a block to be processed, on the basis of an intra prediction mode of the block to be processed; and performing intra prediction for the split block to be processed, wherein the direction in which the block to be processed is split is perpendicular to the prediction direction of the intra prediction mode of the block to be processed.

公开(公告)号：US20190174128A1

公开(公告)日：2019-06-06

申请号：US16324452

申请日：2017-02-07

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Jaehyun LIM ,  Jin HEO

IPC: H04N19/11 ,  H04N19/132 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176

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：US20180199069A1

公开(公告)日：2018-07-12

申请号：US15736234

申请日：2016-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Junghak NAM ,  Chulkeun KIM

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/44 ,  H04N19/117 ,  H04N19/91

CPC classification number: H04N19/70 ,  H04N19/117 ,  H04N19/119 ,  H04N19/136 ,  H04N19/174 ,  H04N19/176 ,  H04N19/1883 ,  H04N19/44 ,  H04N19/82 ,  H04N19/91 ,  H04N19/96

Abstract: Disclosed are a method for encoding/decoding an image, and a device therefor. Specifically, the present invention comprises: a step of parsing, from a bit stream outputted from an encoder, a sample adaptive offset (SAO) in first block units in which the SAO is transmitted; a step of obtaining a reconstructed picture from the bit stream; and a step of summing combining the SAO, parsed to each pixel in the first block units from the reconstructed picture, wherein the first block units may be variably determined by the encoder.

公开(公告)号：US20180199034A1

公开(公告)日：2018-07-12

申请号：US15736238

申请日：2016-06-16

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Chulkeun KIM

IPC: H04N19/117 ,  H04N19/182 ,  H04N19/176 ,  H04N19/513

Abstract: The present invention relates to a method for performing adaptive filtering according to a block boundary, comprising the steps of: determining whether a current pixel is within a block boundary; determining the shape of a filter depending on the location of the current pixel, when the current pixel is within the block boundary; calculating a filter coefficient based on the shape of the filter; and performing an adaptive loop filtering using the filter coefficient.

公开(公告)号：US20180197276A1

公开(公告)日：2018-07-12

申请号：US15737552

申请日：2016-02-02

Applicant: LG Electronics Inc.

Inventor： Chulkeun KIM ,  Junghak NAM

IPC: G06T5/00 ,  G06T5/10 ,  G06T5/20

CPC classification number: G06T5/001 ,  G06T5/10 ,  G06T5/20 ,  H04N19/117 ,  H04N19/70 ,  H04N19/82 ,  H04N19/85

Abstract: A restoring picture filtering method performed by a decoding device, according to the present invention, comprises the steps of: calculating the activity of an image of a target region of a restoring picture; determining the directivity of the image of the target region; selecting a particular filter within a filter set on the basis of the activity and the directivity; and performing filtering on the restoring picture on the basis of the selected filter. According to the present invention, adaptive filtering may be applied on the basis of image properties of a target block of a restoring picture, and the objective/subjective image quality of the restoring picture may be enhanced therethrough.

公开(公告)号：US20180184131A1

公开(公告)日：2018-06-28

申请号：US15735450

申请日：2016-06-13

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi YOO ,  Jin HEO ,  Junghak NAM

IPC: H04N19/91 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44

CPC classification number: H04N19/91 ,  H04N19/124 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44 ,  H04N19/48

Abstract: The present invention provides a method for encoding/decoding an image and a device therefor. Particularly, a method for encoding an image by an encoding device may comprise the steps of: dividing a quantized coefficient block into coefficient groups having a predetermined size; searching a first coefficient group which is a last coefficient group including a non-zero coefficient within the quantized coefficient block according to a predetermined inverse-scanning order; searching the first coefficient group for the last non-zero coefficient according to the inverse-scanning order; relocating the non-zero coefficient of the first coefficient group to a second coefficient group which is a preceding coefficient group of the last coefficient group according to the inverse-scanning order; and entropy-encoding by an encoder according to a predetermined scanning order.