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：US20200236396A1

公开(公告)日：2020-07-23

申请号：US16773958

申请日：2020-01-27

Applicant: LG Electronics Inc.

Inventor： Hyeongmoon JANG ,  Eunyong SON ,  Moonmo KOO ,  Seungwook PARK ,  Yongjoon JEON

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/124 ,  H04N19/503 ,  H04N19/105 ,  H04N19/70 ,  H04N19/182 ,  H04N19/513 ,  H04N19/66

Abstract: A video decoding method performed by a decoding apparatus includes the steps of: deriving control points (CP) for a current block; acquiring movement vectors for the CPs; deriving a sample unit movement vector in the current block on the basis of the acquired movement vectors; and deriving a prediction sample for the current block on the basis of the sample unit movement vector. According to the present invention, it is possible to effectively perform, through sample unit motion vectors, inter-prediction not only in a case where an image in the current block is plane-shifted but also in a case where there are various image distortions.

公开(公告)号：US20200221084A1

公开(公告)日：2020-07-09

申请号：US16624734

申请日：2018-06-19

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/117 ,  H04N19/593 ,  H04N19/70 ,  H04N19/176 ,  H04N19/159

Abstract: The present invention provides an image processing method on the basis of an intra prediction mode and an apparatus therefor. Specifically, a method for processing an image on the basis of an intra prediction mode may comprise the steps of: identifying whether weighted intra prediction is allowed for a current block and whether the weight intra prediction is applied to the current block; identifying whether reference sample filtering is applied to the current block when the weighted intra prediction is not allowed for the current block or when the weighted intra prediction is not applied to the current block; and performing reference sample filtering of reference samples neighboring the current block when the reference sample filtering is applied.

公开(公告)号：US20200177889A1

公开(公告)日：2020-06-04

申请号：US16496319

申请日：2018-01-31

Applicant: LG Electronics Inc.

Inventor： Seunghwan KIM ,  Hyeongmoon JANG ,  Jaehyun LIM

IPC: H04N19/176 ,  H04N19/122 ,  H04N19/124 ,  H04N19/18 ,  H04N19/593 ,  H04N19/159 ,  H04N19/13

Abstract: A transform method, according to the present invention, comprises the steps of: obtaining transform coefficients for a target block; determining a non-separable secondary transform (NSST) set for the target block; selecting one of a plurality of NSST kernels included in the NSST set on the basis of an NSST index; and generating modified transform coefficients by non-separable secondary-transform of the transform coefficients on the basis of the NSST kernel that has been selected, wherein the NSST set for the target block is determined on the basis of an intra-prediction mode and/or the size of the target block. According to the present invention, the amount of data transmitted, which is required for residual processing, can be reduced and residual coding efficiency can be increased.

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：US20190238840A1

公开(公告)日：2019-08-01

申请号：US16337818

申请日：2017-09-28

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon JANG

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/46 ,  H04N19/176

CPC classification number: H04N19/11 ,  H04N19/122 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593 ,  H04N19/70

Abstract: Disclosed is a method and apparatus for processing an image based on an intra prediction mode in the present invention. Particularly, the method may include decoding a Most Probable Mode (MPM) flag indicating whether a current block is encoded by using Most Probable Mode (MPM); generating a first mode group list by using remaining prediction modes except an MPM candidate, when the current block is not encoded by using the MPM; decoding a mode group flag indicating whether the prediction mode of the current block is included in the first mode group list; and determining the prediction mode of the current block by using an index indicating a specific prediction mode in the first mode group list, when the prediction mode of the current block is included in the first mode group list.