公开(公告)号：US20200322611A1

公开(公告)日：2020-10-08

申请号：US16904985

申请日：2020-06-18

Applicant: LG Electronics Inc.

Inventor： Mehdi Salehifar ,  Seunghwan Kim ,  Moonmo Koo ,  Jaehyun Lim ,  Seethal Paluri

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/18 ,  H04N19/176

Abstract: A method for decoding an image by a decoding device according to the present invention comprises the steps of: deriving, from a bit stream, transform coefficients of a block to be decoded; deriving residual samples of the block to be decoded, on the basis of a selective transform of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples of the block to be decoded and prediction samples of the block to be decoded, wherein the selective transform is performed on the basis of a modified transform matrix, the modified transform matrix comprises a matrix including a modified basis vector, and the modified basis vector contains a certain number of elements selected from N elements.

公开(公告)号：US10791337B2

公开(公告)日：2020-09-29

申请号：US16406810

申请日：2019-05-08

Applicant: LG Electronics Inc.

Inventor： Hendry Hendry ,  Seungwook Park ,  Jaehyun Lim ,  Yongjoon Jeon ,  Chulkeun Kim ,  Jungsun Kim ,  Naeri Park ,  Byeongmoon Jeon ,  Joonyoung Park

IPC: H04N19/46 ,  H04N19/577 ,  H04N19/503 ,  H04N19/70 ,  H04N19/423 ,  H04N19/573 ,  H04N19/44

Abstract: The present invention relates to a method for signaling image information and to a decoding method using same. The method for signaling image information according to the present invention comprises: a step of performing inter-prediction for a current picture; and a step of signaling information including the result of said inter-prediction and reference picture information indicating reference pictures usable in said inter prediction, wherein said reference picture information contains pieces of picture order count (POC) information of said usable reference pictures. The POC information of said usable reference pictures in said reference picture information is configured such that POCs for the pictures existing before said current picture in terms of a POC sequence are located at the front, and POCs for the pictures existing after said current picture in terms of a POC sequence are located following the POCs located at the front.

公开(公告)号：US20200304791A1

公开(公告)日：2020-09-24

申请号：US16898928

申请日：2020-06-11

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Mehdi Salehifar ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/122 ,  H04N19/176 ,  H04N19/159 ,  H04N19/61

Abstract: Embodiments of the disclosure provide a method and apparatus for processing video signals. An image signal decoding method according to an embodiment of the disclosure comprises the steps of: determining, on the basis of the height and width of a current block, an input length and output length of a non-separable transform; determining a non-separable transform matrix corresponding to the input length and output length of the non-separable transform; and applying the non-separable transform matrix to the current block, wherein, when the height and width of the current block are 4 each, the input length and output length of the non-separable transform are determined to be 8 and 16 respectively.

公开(公告)号：US10750190B2

公开(公告)日：2020-08-18

申请号：US16340463

申请日：2017-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong Seo ,  Jaehyun Lim

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/85

Abstract: According to the present invention, a method by which a decoding device performs video decoding comprises the steps of: parsing a merge index of a current block; configuring a merge candidate list on the basis of neighboring blocks; selecting a merge candidate indicated by the merge index among merge candidates included in the merge candidate list; deriving L0 motion information and L1 motion information of the current block on the basis of the selected merge candidate; deriving an L0 weight and an L1 weight of the current block; and generating a prediction sample of the current block by weighted-summing an L0 reference sample and an L1 reference sample on the basis of the L0 weight and the L1 weight.

公开(公告)号：US10743021B2

公开(公告)日：2020-08-11

申请号：US16513198

申请日：2019-07-16

Applicant: LG ELECTRONICS INC.

Inventor： Joonyoung Park ,  Seungwook Park ,  Jaehyun Lim ,  Jungsun Kim ,  Younghee Choi ,  Jaewon Sung ,  Byeongmoon Jeon ,  Yongjoon Jeon

IPC: H04N19/55 ,  H04N19/52 ,  H04N19/61 ,  H04N19/176 ,  H04N19/593 ,  H04N19/625 ,  H04N19/172 ,  H04N19/184 ,  H04N19/513

Abstract: The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value.

公开(公告)号：US10742971B2

公开(公告)日：2020-08-11

申请号：US16339635

申请日：2017-07-10

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong Seo ,  Jaehyun Lim

IPC: H04N19/176 ,  H04N7/24 ,  H04N19/105 ,  H04N19/172 ,  H04N19/573 ,  H04N19/139

Abstract: A method for decoding an image by a decoding apparatus according to the present invention comprises the steps of: deriving first motion information of a current block in a first direction and second motion information of the current block in a second direction; deriving a first reference sample on the basis of the first motion information; deriving a second reference sample on the basis of the second motion information; deriving a first weight for the first reference sample and a second weight for the second reference sample; and generating a prediction sample of the current block by performing a weighted summation of the first and second reference samples on the basis of the first and second weights, wherein the first motion information comprises a first reference picture index and a first MV and the second motion information comprises a second reference picture index and a second MV.

公开(公告)号：US10735728B2

公开(公告)日：2020-08-04

申请号：US15767267

申请日：2016-09-22

Applicant: LG ELECTRONICS INC.

Inventor： Jungdong Seo ,  Jaehyun Lim ,  Naeri Park

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/44 ,  H04N19/70 ,  H04N19/136

Abstract: Disclosed are a method for processing an image and an apparatus therefor. Specifically, a method for decoding an image comprises: a step of deriving an initial block size information indicating information in which a first block, which is a basic unit for dividing an image, is divided into one or more initial blocks; a step of deriving a division information indicating information in which the initial block is divided into a plurality of second blocks in the initial block unit divided from the first block based on the initial block size information; and a step of decoding in a second block unit recursively divided from the initial block based on the division information.

公开(公告)号：US10694187B2

公开(公告)日：2020-06-23

申请号：US16086162

申请日：2016-03-18

Applicant: LG Electronics Inc.

Inventor： Jaehyun Lim ,  Naeri Park

IPC: H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/184 ,  H04N19/103 ,  H04N19/503 ,  H04N19/463

Abstract: A video decoding method performed by a decoding device, according to the present invention, comprises the steps of: deriving at least one reference block for an object block; deriving a partitioned structure of the object block on the basis of a partitioned structure of the at least one reference block; partitioning the object block into a plurality of sub blocks on the basis of the derived partitioned structure; and generating recovered samples by decoding the plurality of sub blocks. According to the present invention, a partitioned structure of a current picture can be derived on the basis of a reference block of a neighboring picture, and thus the amount of data used in the additional information signaled for partitioning of the current picture can be reduced and overall coding efficiency can be improved.

公开(公告)号：US10681364B2

公开(公告)日：2020-06-09

申请号：US16113703

申请日：2018-08-27

Applicant: LG ELECTRONICS INC.

Inventor： Hendry Hendry ,  Joonyoung Park ,  Yongjoon Jeon ,  Byeongmoon Jeon ,  Jungsun Kim ,  Jaehyun Lim ,  Chulkeun Kim ,  Naeri Park ,  Seungwook Park

IPC: H04N19/436 ,  H04N19/174 ,  H04N19/119 ,  H04N19/70

Abstract: The present invention relates to a video encoding method, a video decoding method, and a device using the same, and the video encoding method according to the present invention comprises the steps of: specifying a tile and a slice by partitioning an inputted picture; performing encoding on the basis of the tile and the slice; and transmitting the encoded video information, wherein the picture is partitioned into one or more tiles and one or more slices, and the restrictions for parallel processing can be applied to the tiles and the slices.

公开(公告)号：US10547847B2

公开(公告)日：2020-01-28

申请号：US15761356

申请日：2016-03-03

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Jaehyun Lim ,  Seungwook Park ,  Sehoon Yea

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/51 ,  H04N19/517 ,  H04N19/52

Abstract: An image encoding method according to the present invention, which is performed by an encoding apparatus, comprises the steps of: generating an adaptive motion vector range (AMVR) enable flag; deriving a motion vector difference (MVD) with respect to a current block; deriving a representative MVD value of an MVD range including a value of the MVD from among a plurality of MVD ranges; generating a coded MVD corresponding to the representative MVD value; and outputting the AMVR enable flag and the coded MVD through a bit stream. According to the present invention, the amount of bits allocated to an MVD can be reduced and the overall coding efficiency can thus be increased.