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：US20180146195A1

公开(公告)日：2018-05-24

申请号：US15577029

申请日：2016-05-26

Applicant: LG Electronics Inc. ,  University of Southern California

Inventor： Moonmo KOO ,  Sehoon YEA ,  Bumshik LEE ,  Amir SAID ,  Hilmi Enes EGILMEZ ,  Antonio ORTEGA

IPC: H04N19/122 ,  H04N19/625 ,  H04N19/61 ,  H04N19/176

Abstract: The present invention provides a method for decoding a video signal using an adaptive separable graph-based transform, comprising the steps of: receiving a transform index for a target block from the video signal, wherein the transform index indicates a graph-based transform to be applied to the target block; deriving a graph-based transform kernel corresponding to the transform index; and decoding the target block based on the graph-based transform kernel.

公开(公告)号：US20180288438A1

公开(公告)日：2018-10-04

申请号：US15764599

申请日：2016-09-29

Applicant: LG Electronics Inc. ,  University of Southern California

Inventor： Yung-Hsuan CHAO ,  Sehoon YEA ,  Antonio Ortega

IPC: H04N19/61 ,  H04N19/91 ,  H04N19/124 ,  H04N19/147 ,  H04N19/50 ,  H04N19/625

CPC classification number: H04N19/61 ,  H04N19/107 ,  H04N19/11 ,  H04N19/117 ,  H04N19/12 ,  H04N19/124 ,  H04N19/13 ,  H04N19/14 ,  H04N19/147 ,  H04N19/176 ,  H04N19/196 ,  H04N19/50 ,  H04N19/625 ,  H04N19/90 ,  H04N19/91 ,  H04N19/96

Abstract: The present invention provides a method for encoding a video signal on the basis of a graph-based lifting transform (GBLT), comprising the steps of: detecting an edge from an intra residual signal; generating a graph on the basis of the detected edge, wherein the graph includes a node and a weight link; acquiring a GBLT coefficient by performing the GBLT for the graph; quantizing the GBLT coefficient; and entropy-encoding the quantized GBLT coefficient, wherein the GBLT includes a partitioning step, a prediction step, and an update step.

公开(公告)号：US20180288411A1

公开(公告)日：2018-10-04

申请号：US15764230

申请日：2016-09-29

Applicant: LG Electronics Inc. ,  UNIVERSITY OF SOUTHERN CALIFORNIA

Inventor： Hilmi E. EGILMEZ ,  Sehoon YEA ,  Antonio ORTEGA ,  Onur G. GULERYUZ ,  Jana EHMANN

IPC: H04N19/11 ,  H04N19/13 ,  H04N19/134

Abstract: The present invention provides a method for encoding a video signal by using a single optimized graph, comprising the steps of: obtaining a residual block; generating graphs from the residual block; generating an optimized graph and an optimized transform by combining the graphs, wherein the graphs are combined on the basis of an optimization step; and performing a transform for the residual block on the basis of the optimized graph and the optimized transform.

公开(公告)号：US20210227261A1

公开(公告)日：2021-07-22

申请号：US16074265

申请日：2017-02-01

Applicant: LG ELECTRONICS INC. ,  UNIVERSITY OF SOUTHERN CALIFORNIA

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

IPC: H04N19/61 ,  H04N19/14 ,  H04N19/13 ,  H04N19/182 ,  H04N19/124 ,  H04N19/107

Abstract: The present invention provides a method for encoding a video signal based on an Edge Adaptive Graph-Based Transform (EA-GBT) including detecting a step edge or a ramp edge from a residual signal; generating a graph signal based on at least one of the step edge or the ramp edge; obtaining an EA-GBT coefficient by performing the EA-GBT for the graph signal; quantizing the EA-GBT coefficient; and entropy-encoding the quantized EA-GBT coefficient.

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：US20190037232A1

公开(公告)日：2019-01-31

申请号：US16074710

申请日：2017-02-02

Applicant: LG ELECTRONICS INC.

Inventor： Jana EHMANN ,  Onur G. GULERYUZ ,  Sehoon YEA

IPC: H04N19/52 ,  H04N19/192 ,  H04N19/126 ,  H04N19/117 ,  H04N19/13 ,  H04N19/147 ,  H04N19/176

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/117 ,  H04N19/124 ,  H04N19/126 ,  H04N19/13 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/192 ,  H04N19/46 ,  H04N19/51 ,  H04N19/567

Abstract: The present invention provides a method for encoding a video signal by using an enhanced prediction signal, the method comprising the steps of: generating a prediction signal for a current block, wherein the prediction signal is generated by applying a prediction weight to a reconstructed pixel of the current block and a pixel of a motion-compensated previously decoded block; obtaining an optimal quantized transform coefficient for the current block through rate-distortion optimization, on the basis of the prediction signal; and performing entropy encoding of the optimal quantized transform coefficient.

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：US20180270485A1

公开(公告)日：2018-09-20

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

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.

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.