公开(公告)号：US20200329232A1

公开(公告)日：2020-10-15

申请号：US16304862

申请日：2016-05-27

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Bumshik LEE ,  Sehoon YEA

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/61 ,  H04N19/124 ,  H04N19/91

Abstract: The present invention provides a method for decoding a video signal including extracting a prediction mode for a current block from the video signal; generating a prediction block in a spatial domain according to the prediction mode; obtaining a transformed prediction block by performing a transform on the prediction block; updating the transformed prediction block using a correlation coefficient or a scaling coefficient; and generating a reconstruction block based on the updated transformed prediction block and a residual block.

公开(公告)号：US20190191156A1

公开(公告)日：2019-06-20

申请号：US16301088

申请日：2016-05-12

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Bumshik LEE

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/46 ,  H04N19/124

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/192 ,  H04N19/46 ,  H04N19/593

Abstract: According to the present invention, a picture encoding method comprises the steps of: selecting a Vth basis function for a current block according to a specific order from among basis functions; deriving a Vth expansion coefficient on the basis of the selected Vth basis function; calculating a Vth weighted error criterion on the basis of the selected Vth basis function and the derived Vth expansion coefficient; and encoding and outputting information indicating the Vth number as a basis number when the value of the Vth weighted error criterion is less than a specific critical value. According to the present invention, more accurate intra prediction in a sample unit can be performed, and intra prediction performance can be significantly improved. In addition, according to the present invention, calculation complexity can be reduced, thereby enabling a data amount for a residual signal for a current block to be removed or reduced and the overall coding efficiency to be improved.

公开(公告)号：US20180324418A1

公开(公告)日：2018-11-08

申请号：US15768326

申请日：2016-10-13

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Sehoon YEA ,  Kyuwoon KIM ,  Bumshik LEE

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593

CPC classification number: H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/593

Abstract: The present invention provides a method for processing a video signal, comprising generating a prediction block for a neighbor block using a reconstructed reference pixel of the neighbor block when the neighbor block adjacent to a current block is intra-coded; determining a refined intra prediction mode of the neighbor block based on the prediction block, where the refined intra prediction mode represents a mode which minimizes an error between the prediction block and a reconstructed neighbor block; generating a prediction mode candidate list for the current block based on the refined intra prediction mode; selecting an intra prediction mode for the current block from the prediction mode candidate list; and performing a prediction for the current block based on the intra prediction mode.

公开(公告)号：US20180302620A1

公开(公告)日：2018-10-18

申请号：US15767962

申请日：2016-10-17

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Bumshik LEE ,  Sehoon YEA ,  Kyuwoon KIM

IPC: H04N19/119 ,  H04N19/61 ,  H04N19/159 ,  H04N19/147 ,  H04N19/96 ,  H04N19/176

Abstract: The present invention provides a method for encoding a video signal comprising the steps of: performing block division with respect to a target unit of the video signal, wherein the block division is performed on the basis of square division and/or non-square division; determining the optimal block partition on the basis of a rate distortion cost, when the target unit is divided into a plurality of non-square blocks; and performing CNT prediction coding on the non-square blocks resulting from the optimal block partition, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.

公开(公告)号：US20210289230A1

公开(公告)日：2021-09-16

申请号：US16318075

申请日：2016-07-15

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Sehoon YEA ,  Bumshik LEE

IPC: H04N19/61 ,  H04N19/159 ,  H04N19/176 ,  H04N19/167 ,  H04N19/523 ,  H04N19/182 ,  H04N19/124 ,  H04N19/109

Abstract: The present invention provides a method for decoding a video signal including extracting an inter prediction mode of a current block from the video signal; generating two non-square prediction blocks using two motion vectors according to the inter prediction mode; performing a non-square transform on the two non-square prediction blocks to obtain two non-square prediction blocks on a frequency domain; updating the two non-square prediction blocks on the frequency domain using a correlation coefficient or a scaling coefficient; and generating a reconstruction block based on the updated non-square prediction blocks on the frequency domain and a residual block.

公开(公告)号：US20210243441A1

公开(公告)日：2021-08-05

申请号：US16074372

申请日：2017-02-01

Applicant: LG ELECTRONICS INC. ,  UNIVERSITY OF SOUTHERN CALIFORNIA

Inventor： Hilmi E. EGILMEZ ,  Yung-Hsuan CHAO ,  Antonio ORTEGA ,  Bumshik LEE ,  Sehoon YEA

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/159 ,  H04N19/61

Abstract: The present invention provides a method for encoding a video signal on the basis of a graph-based separable transform (GBST), the method comprising the steps of: generating an incidence matrix representing a line graph; training a sample covariance matrix for rows and columns from the rows and columns of a residual signal; calculating a graph Laplacian matrix for rows and columns on the basis of the incidence matrix and the sample covariance matrix for rows and columns; and obtaining a GBST by performing eigen decomposition of the graph Laplacian matrix for rows and columns.

公开(公告)号：US20190141317A1

公开(公告)日：2019-05-09

申请号：US16096194

申请日：2017-02-08

Applicant: LG ELECTRONICS INC.

Inventor： Jin HEO ,  Bumshik LEE

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/91

Abstract: An image decoding method performed by a decoding device according to the present invention comprises the steps of: deriving an intra prediction mode for a current PU on the basis of a received bit stream; and performing reconstruction of a plurality of TUs located in an area of the current PU on the basis of the intra prediction mode, wherein the step of performing reconstruction comprises, with respect to a current block that is one of the plurality of TUs, a step of deriving a prediction sample of the current block on the basis of a first reference sample located in a prediction direction of the intra prediction mode and a second reference sample located in an opposite direction of the prediction direction, and a step of reconstructing a block to be reconstructed on the basis of the prediction sample.

公开(公告)号：US20180309996A1

公开(公告)日：2018-10-25

申请号：US15768294

申请日：2016-10-13

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Sehoon YEA ,  Eunyong SON ,  Kyuwoon KIM ,  Jin HEO ,  Junghak NAM ,  Bumshik LEE

IPC: H04N19/13 ,  H04N19/14 ,  H04N19/157 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/11 ,  H04N19/14 ,  H04N19/157 ,  H04N19/172 ,  H04N19/176 ,  H04N19/70

Abstract: The present invention provides a method for encoding a video signal comprising the steps of: obtaining activity information from the video signal, wherein the activity signal indicates information relating to edge characteristics of an image and includes edge orientation information and/or edge level information; determining conditionally non-linear transform (CNT) configuration information on the basis of the activity information; and performing CNT prediction coding on the basis of the CNT configuration information, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.

公开(公告)号：US20180220158A1

公开(公告)日：2018-08-02

申请号：US15746158

申请日：2016-07-21

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Sehoon YEA ,  Kyuwoon KIM ,  Bumshik LEE

IPC: H04N19/61 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44

CPC classification number: H04N19/61 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44

Abstract: A method for decoding a video signal using a graph-based transform, the method being characterized by including the steps of: parsing a transform index from the video signal; obtaining context information for a target unit, where the context information includes a prediction mode for a current block or peripheral blocks; obtaining an inverse-transform kernel on the basis of at least one of the transform index and the context information; and performing an inverse transform for the current block using the inverse transform kernel.