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：US20200092553A1

公开(公告)日：2020-03-19

申请号：US15750751

申请日：2016-08-08

Applicant: LG Electronics Inc.

Inventor： Onur G. GULERYUZ ,  Hilmi E. EGILMEZ ,  Jana EHMANN

IPC: H04N19/12 ,  H04N19/196 ,  H04N19/60 ,  H04N19/176 ,  G06N7/00

Abstract: A method for encoding a video signal includes: a step of selecting a transform parameter set via an optimization process for a target block, wherein the transform parameter set comprises a vertical transform set, a horizontal transform set and a transform order parameter set; a step of updating, on the basis of the selected transform parameter set, a transform block having a singleton coefficient, wherein the single ton coefficient represents a single coefficient obtained on the basis of the transform order parameter set; a step of obtaining a transform coefficient for the target block on the basis of the updated transform block; a step of quantizing the transform coefficient; and a step of entropy encoding the quantized transform coefficient.

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：US20200288129A1

公开(公告)日：2020-09-10

申请号：US15932206

申请日：2016-08-19

Applicant: LG Electronics Inc.

Inventor： Hilmi E. EGILMEZ ,  Jana Ehmann ,  Onur G. GULERYUZ

IPC: H04N19/12 ,  H04N19/159 ,  H04N19/61 ,  H04N19/18

Abstract: The present invention, with respect to a method of processing video data, provides a method of processing video data, provides a method characterized by comprising the steps of: performing a clustering for the video data; generating at least one data cluster as a result of the clustering; generating at least one Graph laplacian matrix corresponding to the at least one data cluster; performing conversion optimization on the basis of multiple graph-based models, wherein the multiple graph-based models respectively include at least one graph laplacian matrix; and generating an optimized conversion matrix according to the results of performing the conversion optimization.

公开(公告)号：US20210195241A1

公开(公告)日：2021-06-24

申请号：US16074364

申请日：2017-02-01

Applicant: LG Electronics Inc.

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

IPC: H04N19/60 ,  H04N19/124 ,  H04N19/88 ,  H04N19/18 ,  G06F7/78

Abstract: The present invention provides a method for performing a transform, the method comprising the steps of: deriving a row transform set, a column transform set, and a permutation matrix on the basis of a given transform matrix (H) and error tolerance parameter; obtaining a row-column transform (RCT) coefficient on the basis of the row transform set, the column transform set, and the permutation matrix; and performing a quantization and an entropy encoding on the RCT coefficient, wherein the permutation matrix represents a matrix obtained by permutating a row of an identity matrix.

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.