公开(公告)号：US11503292B2

公开(公告)日：2022-11-15

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 ,  H04N19/159 ,  H04N19/176 ,  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：US10979736B2

公开(公告)日：2021-04-13

申请号：US16620438

申请日：2018-06-08

Applicant: LG ELECTRONICS INC. ,  INDUSTRY-ACADEMIC COOPERATION FOUNDATION, CHOSUN UNIVERSITY

Inventor： Moonmo Koo ,  Jaehyun Lim ,  Bumshik Lee

IPC: H04N19/61 ,  H04N19/176 ,  H04N19/625

Abstract: The present disclosure provides a method for processing a video signal by using a linear relationship between transform types, the method comprising the steps of: determining a transform group on the basis of a prediction mode of a current block; parsing a transform combination index from the video signal, wherein the transform combination index indicates one of a plurality of transform combinations in the transform group; deriving a transform combination corresponding to the transform combination index, wherein the transform combination includes a horizontal transform and a vertical transform and includes DST-1 or DCT-5; performing inverse transform of the current block on the basis of the transform combination; and reconstructing the video signal by using the inverse-transformed current block.

公开(公告)号：US10819987B2

公开(公告)日：2020-10-27

申请号：US15775307

申请日：2016-11-11

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Bumshik Lee ,  Sehoon Yea

IPC: H04N19/18 ,  H04N19/159 ,  H04N19/176 ,  H04N19/124 ,  H04N19/44 ,  H04N19/119 ,  H04N19/11 ,  H04N19/105 ,  H04N19/61 ,  H04N19/50

Abstract: An intra prediction method according to the present invention comprises the steps of: determining an intra prediction mode for a current block; determining whether to apply a coefficient induced intra prediction (CIIP) to the current block; deriving neighboring reference samples for the current block on the basis of whether the CIIP is applied; and generating prediction samples for the current block on the basis of the intra prediction mode and the neighboring samples. The present invention can generate modified or improved neighboring reference samples and thereby can improve the performance of intra prediction.

公开(公告)号：US10523945B2

公开(公告)日：2019-12-31

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: H04B1/66 ,  H04N19/13 ,  H04N19/70 ,  H04N19/172 ,  H04N19/157 ,  H04N19/105 ,  H04N19/14 ,  H04N19/176 ,  H04N19/11

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：US10469838B2

公开(公告)日：2019-11-05

申请号：US15758920

申请日：2016-09-12

Applicant: LG ELECTRONICS INC.

Inventor： Bumshik Lee ,  Sehoon Yea ,  Moonmo Koo

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/61 ,  H04N19/11 ,  H04N19/182 ,  H04N19/90 ,  H04N19/107 ,  H04N19/122 ,  H04N19/18 ,  H04N19/159 ,  H04N19/134 ,  H04N19/12 ,  H04N19/463 ,  H04N19/91

Abstract: A method of encoding a video signal using a graph-based transformation includes: generating a residual block using a prediction block generated according to an intra prediction mode; obtaining at least one of a self-loop weight indicating a weight of boundary pixels in the residual block or a correlation coefficient indicating an inter-pixel correlation, on the basis of a prediction angle corresponding to the intra prediction mode; generating a graph on the basis of at least one of the self-loop weight or the correlation coefficient; determining a graph-based transformation kernel on the basis of the graph; and performing a transform for the residual block using the graph-based transformation kernel.