公开(公告)号：US10924730B2

公开(公告)日：2021-02-16

申请号：US16347422

申请日：2016-11-07

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/172 ,  H04N19/91 ,  H04N19/132 ,  H04N19/86 ,  H04N19/109

Abstract: According to the present invention, an image decoding method performed by a decoding device comprises the steps of: generating a first prediction block and a second prediction block of a current block; selecting a prediction block, to which a Wiener filter is to be applied, among the first prediction block and the second prediction block; deriving Wiener filter coefficients of the selected prediction block based on the first prediction block and the second prediction block; filtering the selected prediction block based on the derived Wiener filter coefficients; and generating a reconstructed block of the current block based on the filtered prediction block. According to the present invention, the overall coding efficiency can be improved by minimizing the difference between prediction blocks.

公开(公告)号：US10778985B2

公开(公告)日：2020-09-15

申请号：US15762958

申请日：2016-09-23

Applicant: LG Electronics Inc.

Inventor： Jin Heo ,  Eunyong Son ,  Junghak Nam ,  Seungwook Park ,  Sehoon Yea

IPC: G06K9/36 ,  G06K9/46 ,  H04N19/159 ,  H04N19/176 ,  H04N19/11 ,  H04N19/46 ,  H04N19/61 ,  H04N19/593 ,  H04N19/146

Abstract: An image decoding method, which is performed by a decoding apparatus, includes the steps of: deriving a frequency domain-neighboring block for a neighboring block of a current block in a spatial domain; deriving a frequency domain-prediction block for the current block by applying a prediction pattern to the frequency domain-neighboring block; generating a frequency domain-reconstructed block for the current block on the basis of the frequency domain-prediction block; and generating a reconstructed block for the current block in the spatial domain on the basis of the frequency inverse transform of the frequency domain-reconstructed block. The present invention can generate a prediction block for a current block in a frequency domain, and accordingly can more efficiently reconstruct a complex image.

公开(公告)号：US10701383B2

公开(公告)日：2020-06-30

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 ,  H04N19/117 ,  H04N19/80 ,  H04N19/124 ,  H04N19/159

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：US10659801B2

公开(公告)日：2020-05-19

申请号：US16087963

申请日：2016-03-24

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Jaehyun Lim ,  Junghak Nam

IPC: H04N21/235 ,  H04N19/119 ,  H04N19/513 ,  H04N19/103 ,  H04N19/44 ,  H04N19/537 ,  H04N19/176

Abstract: A video decoding method performed by a decoding apparatus comprises: deriving control points (CPs) for the current block; obtaining motion vectors for the CPs; deriving a motion vector of a sub-block or a sample unit in the current block on the basis of the obtained motion vectors; deriving a prediction sample for the current block on the basis of the derived motion vector; and generating a reconstruction sample on the basis of the prediction sample. The method enables effective performance of inter prediction through the motion vectors (transformation prediction), not only when an image in the current block is moved in a plane, but also when the image in the current block is rotated, zoomed in, zoomed out, or transformed into a parallelogram. Accordingly, the amount of data for the residual signal for the current block can be eliminated or reduced, and the overall coding efficiency can be improved.

公开(公告)号：US10448015B2

公开(公告)日：2019-10-15

申请号：US15736238

申请日：2016-06-16

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Chulkeun Kim

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/124 ,  H04N19/182 ,  H04N19/513 ,  H04N19/82 ,  H04N19/96

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：US10419779B2

公开(公告)日：2019-09-17

申请号：US15111735

申请日：2015-09-24

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Junghak Nam ,  Sehoon Yea

IPC: H04N19/597 ,  H04N13/00 ,  H04N19/70 ,  H04N19/172 ,  H04N19/176 ,  H04N13/128 ,  H04N19/174 ,  H04N13/194

Abstract: The present invention relates to a device and a method for coding a 3D video, a decoding method, according to the present invention, comprising the steps of: receiving, through a first syntax, a camera parameter for switching a depth value into a disparity value; determining whether the camera parameter which applies to a previous slice or picture applies to a current slice or picture; and if the camera parameter applies to a current slice or picture, deriving a disparity value of a current block on the basis of the camera parameter. According to the present invention, slices or pictures of a certain interval may share the same camera parameter, the transmission of overlapping information may be prevented, and coding efficiency may be improved.

公开(公告)号：US20180295361A1

公开(公告)日：2018-10-11

申请号：US15764816

申请日：2016-09-23

Applicant: LG Electronics Inc.

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

IPC: H04N19/117 ,  H04N19/80 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/117 ,  H04N19/147 ,  H04N19/176 ,  H04N19/196 ,  H04N19/42 ,  H04N19/44 ,  H04N19/513 ,  H04N19/80 ,  H04N19/82

Abstract: A filtering method performed by a decoding device according to the present invention comprises the steps of: deriving a specific neighboring block of a current block so as to derive filter information on the current block; deriving the specific neighboring block and a reference block within a reference picture corresponding to the specific neighboring block; deriving the filter information on the current block on the basis of the specific neighboring block and the reference block; and filtering the current block on the basis of the filter information. According to the present invention, the overall coding efficiency can be improved by deriving the filter information on the basis of the neighboring block of the already decoded current block and reducing or removing the amount of data for the transmission of the information necessary for filter generation.

公开(公告)号：US10045048B2

公开(公告)日：2018-08-07

申请号：US15028905

申请日：2014-10-20

Applicant: LG ELECTRONICS INC.

Inventor： Junghak Nam ,  Jin Heo ,  Taesup Kim ,  Jungdong Seo ,  Sehoon Yea

IPC: H04N7/12 ,  H04N19/597 ,  H04N19/44 ,  H04N19/52 ,  H04N19/70

Abstract: The present invention relates to a video decoding apparatus and a method for decoding a multi-view video, and the video decoding apparatus according to the present invention comprises: an entropy-decoding unit for entropy-decoding a bitstream and outputting video information required for decoding a current block in a depth picture; a memory for saving pictures referenced when decoding the current block; and a prediction unit for inducing a prediction sample of the current block, by using motion information of a texture picture within the same view as motion information of the current block.

公开(公告)号：US12289444B2

公开(公告)日：2025-04-29

申请号：US18386130

申请日：2023-11-01

Applicant: LG Electronics Inc.

Inventor： Naeri Park ,  Junghak Nam ,  Hyeongmoon Jang

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

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

公开(公告)号：US12284355B2

公开(公告)日：2025-04-22

申请号：US18440778

申请日：2024-02-13

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Jangwon Choi

IPC: H04N19/00 ,  H04N19/117 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/80

Abstract: According to an embodiment of the present document, a method for increasing the accuracy of in-loop filtering is proposed. In an example, the filtering accuracy of chroma blocks can be improved on the basis of luma blocks by performing a cross component adaptive loop filtering process.