公开(公告)号：US20210037266A1

公开(公告)日：2021-02-04

申请号：US17073047

申请日：2020-10-16

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Seunghwan KIM ,  Jaehyun LIM ,  Hyeongmoon JANG

IPC: H04N19/96 ,  H04N19/70 ,  H04N19/176 ,  H04N19/119

Abstract: Disclosed are a method for decoding a video signal and an apparatus therefor. Specifically, a method for decoding an image may include: partitioning a current coding tree block into a plurality of coding blocks so that coding blocks partitioned from the current coding tree block are included in a current picture when the current coding tree block is out of a boundary of the current picture; parsing a first syntax element indicating whether a current coding block is partitioned into a plurality of subblocks when the current coding block satisfies a predetermined condition; and determining a split mode of the current coding block based on the syntax element.

公开(公告)号：US20210021848A1

公开(公告)日：2021-01-21

申请号：US17060598

申请日：2020-10-01

Applicant: LG ELECTRONICS INC.

Inventor： Junghak NAM ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/44 ,  H04N19/70 ,  H04N19/96 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176

Abstract: A video decoding method includes: when a current block satisfies a preconfigured condition, parsing a first syntax element indicating whether the current block is split into a plurality of sub-blocks; when the first syntax element indicates that the current block is split, parsing a second syntax element indicating whether the current block is split using a quad-tree structure; when the second syntax element indicates that the current block is not split using the quad-tree structure, parsing at least one of a third syntax element indicating whether the current block is split using a binary-tree structure or a ternary-tree structure and a fourth syntax element indicating a split direction of the current block; and determining a split mode of the current block based on at least one of the first syntax element, the second syntax element, the third syntax element and the fourth syntax element.

公开(公告)号：US20200296414A1

公开(公告)日：2020-09-17

申请号：US16767925

申请日：2018-11-28

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/56 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

Abstract: An image decoding method that is performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining information regarding inter-prediction of a current block via a bitstream; forming an MVP candidate list based on neighbouring blocks of the current block; deriving costs with respect to MVP candidates that are included in the MVP candidate list; deriving a revised MVP candidate list based on the costs with respect to the MVP candidates; deriving MVP of the current block based on the revised MVP candidate list; deriving a motion vector of the current block based on the MVP and MVD of the current block; and performing prediction on the current block based on a reference picture index and the motion vector of the current block, wherein the information regarding inter-prediction includes the reference picture index and the MVD.

公开(公告)号：US20200162743A1

公开(公告)日：2020-05-21

申请号：US16628420

申请日：2018-03-14

Applicant: LG Electronics Inc.

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

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/513 ,  H04N19/105 ,  H04N19/139

Abstract: Disclosed herein are an inter prediction mode-based image processing method and an apparatus therefor. Specifically, a method for processing an image based on an inter prediction mode may include: generating a temporary candidate list by using a spatial neighbor block or temporal neighbor block of a current block; calculating a cost for each candidate in the temporary candidate list by using a template of the current block; generating a final candidate list by rearranging candidates of the temporary candidate list based on the calculated cost; decoding a merge index indicating a specific candidate in the final candidate list; and generating a prediction block of the current block by using motion information of a candidate indicated by the merge index.

公开(公告)号：US20200045305A1

公开(公告)日：2020-02-06

申请号：US16337867

申请日：2017-09-29

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Jaehyun LIM

IPC: H04N19/103 ,  H04N19/119 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70 ,  H04N19/61

Abstract: Disclosed is a method for processing an image and an apparatus therefor in the present invention. Particularly, a method for decoding an image may include generating a prediction block of a current processing block by using a prediction mode of the current processing block, wherein the current processing block indicates a block in which a leaf node block partitioned into a quadtree structure from a basic unit partitioning a picture is partitioned into a binary tree structure; determining whether a skip mode is applied to the current processing block; and generating a residual block of the current processing block, when the skip mode is not applied for the current processing block, wherein the step of generating the residual block includes decoding a syntax element indicating whether a residual signal is existed in a chroma component of the current processing block.

公开(公告)号：US20190356915A1

公开(公告)日：2019-11-21

申请号：US16475825

申请日：2017-12-27

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Seunghwan KIM ,  Junghak NAM ,  Jaehyun LIM

IPC: H04N19/12 ,  H04N19/91 ,  H04N19/176 ,  H04N19/14 ,  H04N19/124

Abstract: Disclosed are a method and an apparatus for encoding/decoding a video signal. Specifically, a method for decoding a video signal may include: generating a quantized transform block by performing entropy decoding for the video signal; generating a dequantized transform block by performing dequantization for the quantized transform block; determining whether to apply secondary inverse transform based on information related to a non-zero coefficient in the dequantized transform block; and performing the secondary inverse transform for the dequantized transform block by using a secondary inverse transform kernel applied to the dequantized transform block.

公开(公告)号：US20180249171A1

公开(公告)日：2018-08-30

申请号：US15754720

申请日：2016-02-29

Applicant: LG Electronics, Inc.

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

IPC: H04N19/51 ,  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：US20180192068A1

公开(公告)日：2018-07-05

申请号：US15737140

申请日：2016-06-16

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Chulkeun KIM ,  Seungwook PARK ,  Sehoon YEA

IPC: H04N19/44 ,  H04N19/80 ,  H04N19/117

Abstract: Disclosed in the present invention are a method for encoding/decoding an image and a device for same. Particularly, a method for decoding an image may comprise the steps of: parsing a filter index from a bit stream outputted from an encoder; determining a filter set using the filter index, from among a plurality of filter sets belonging to a predetermined filter bank; deriving a filter coefficient based on a coefficient for filtering, defined by the filter set, which has been determined by the filter index; and applying filtering to a reconstructed image obtained using a prediction signal and a differential signal, by using the derived filter coefficient.

公开(公告)号：US20180176592A1

公开(公告)日：2018-06-21

申请号：US15737037

申请日：2015-12-09

Applicant: LG Electronics Inc.

Inventor： Jaehyun LIM ,  Seungwook PARK ,  Junghak NAM

IPC: H04N19/513 ,  H04N19/46 ,  H04N19/176

Abstract: A block prediction method for decoding a picture, according to the present invention, comprises the steps of: deriving a reference block from a reference picture to predict a current block in a current picture; determining a reference illumination compensation (IC) parameter; generating an illumination-compensated reference block by applying reference IC to the reference block on the basis of the reference IC parameter; and generating a predicted sample of the current block on the basis of the illumination-compensated reference block. According to the present invention, an illumination difference between the current block of the current picture and the reference block of the reference picture can be compensated for, block prediction efficiency can be increased, and a data amount of a residual signal to be transmitted from an encoder to a decoder is reduced. Therefore, compression and coding efficiency can be increased.

公开(公告)号：US20180124398A1

公开(公告)日：2018-05-03

申请号：US15570160

申请日：2016-04-27

Applicant: LG Electronics Inc.

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

IPC: H04N19/109 ,  H04N19/105 ,  H04N19/107 ,  H04N19/91 ,  H04N19/124

CPC classification number: H04N19/109 ,  H04N19/105 ,  H04N19/107 ,  H04N19/119 ,  H04N19/124 ,  H04N19/463 ,  H04N19/70 ,  H04N19/91 ,  H04N19/96

Abstract: The present invention relates to method and device for decoding a bitstream for a video signal in a decoding device, the method comprising the steps of: obtaining skip flag information about a current coding block from a bitstream; and, if the skip flag information indicates that a skip mode is applied with respect to the current coding block, performing inter-prediction for the current coding block by means of inter-prediction parameter information of a neighboring block of the current coding block. Moreover, the neighboring block of the current coding block comprises a plurality of temporal neighboring blocks and spatial neighboring blocks adjacent to the current coding block. Also, the step of performing inter-prediction for the current coding block comprises: dividing of the current coding block into a plurality of sub-blocks; with respect to each of the plurality of sub-blocks, obtaining of inter-prediction parameter information for the corresponding sub-blocks from neighboring blocks that are adjacent to the corresponding sub-blocks among the neighboring blocks of the current coding blocks; and obtaining of a predicted value for the corresponding sub-blocks on the basis of the obtained inter-prediction parameter information.