公开(公告)号：US10771815B2

公开(公告)日：2020-09-08

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 ,  H04N19/117 ,  H04N19/96 ,  H04N19/147 ,  H04N19/12 ,  H04N19/90 ,  H04N19/176 ,  H04N19/14 ,  H04N19/625 ,  H04N19/124 ,  H04N19/91 ,  H04N19/11 ,  H04N19/13 ,  H04N19/196 ,  H04N19/107 ,  H04N19/50

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：US11695958B2

公开(公告)日：2023-07-04

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: H04N11/02 ,  H04N19/61 ,  H04N19/107 ,  H04N19/124 ,  H04N19/13 ,  H04N19/14 ,  H04N19/182

CPC classification number: H04N19/61 ,  H04N19/107 ,  H04N19/124 ,  H04N19/13 ,  H04N19/14 ,  H04N19/182

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：US10567763B2

公开(公告)日：2020-02-18

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 ,  H04N19/105 ,  H04N19/176 ,  H04N19/61 ,  H04N19/625 ,  H04N19/82

Abstract: A method and a device for decoding a video signal using an adaptive separable graph-based transform. The method includes: receiving a transform index for a target block from the video signal in which 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. The device includes: a parsing unit configured to receive a transform index for a target block from the video signal; and an inverse-transform unit configured to derive a graph-based transform kernel corresponding to the transform index and decode the target block based on the graph-based transform kernel.

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：US10715802B2

公开(公告)日：2020-07-14

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: H04N19/176 ,  H04N19/134 ,  H04N19/11 ,  H04N19/13 ,  H04N19/85 ,  H04N19/90 ,  H04N19/96 ,  H04N19/91

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：US11647228B2

公开(公告)日：2023-05-09

申请号：US16318075

申请日：2016-07-15

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Sehoon Yea ,  Bumshik Lee

IPC: H04N11/02 ,  H04N19/61 ,  H04N19/109 ,  H04N19/124 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/182 ,  H04N19/523

CPC classification number: H04N19/61 ,  H04N19/109 ,  H04N19/124 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/182 ,  H04N19/523

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：US10721492B2

公开(公告)日：2020-07-21

申请号：US15762946

申请日：2016-09-08

Applicant: LG Electronics Inc.

Inventor： Eunyong Son ,  Jin Heo ,  Seungwook Park ,  Sehoon Yea

IPC: H04N19/61 ,  H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/44 ,  H04N19/96 ,  H04N19/196 ,  H04N19/182

Abstract: An intra prediction method includes: receiving intra prediction mode information through a bitstream; deriving an intra prediction mode of a current block as a first intra directional mode on the basis of the intra prediction mode information; deriving first neighboring samples of the current block; deriving a reference sample adjacent to a target sample in the current block on the basis of a prediction direction of the first intra directional mode; deriving second neighboring samples of a neighboring block to which the reference sample belongs; determining a modified prediction direction on the basis of a comparison between the reference sample and at least one of the second neighboring samples; and deriving a prediction value for the target sample on the basis of the modified prediction direction and the first neighboring samples.

公开(公告)号：US10587894B2

公开(公告)日：2020-03-10

申请号：US15510500

申请日：2015-09-07

Applicant: LG ELECTRONICS INC.

Inventor： Sunmi Yoo ,  Jungdong Seo ,  Junghak Nam ,  Sehoon Yea

IPC: H04N19/597 ,  H04N19/176 ,  H04N19/70 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/52 ,  H04N19/513

Abstract: The present invention relates to a device and a method for coding a multi-view video, a residual prediction method, according to the present invention, comprising the steps of: deriving a disparity vector of a current block; performing residual prediction on the current block on the basis of the disparity vector; and generating a residual prediction sample, wherein the disparity vector is not derived on the basis of a neighboring block of the current block, but is derived from a preset default vector. According to the present invention, the effect of prediction may be increased by performing residual prediction on the current block according to a certain condition, not only when the disparity vector is induced but also when the disparity vector is not induced from the neighboring block of the current block.

公开(公告)号：US10587873B2

公开(公告)日：2020-03-10

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 ,  H04N19/147 ,  H04N19/593 ,  H04N19/176

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：US10129560B2

公开(公告)日：2018-11-13

申请号：US14904638

申请日：2014-07-18

Applicant: LG ELECTRONICS INC.

Inventor： Taesup Kim ,  Sunmi Yoo ,  Sehoon Yea

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/44 ,  H04N19/136 ,  H04N19/597

Abstract: The present invention relates to a method and an apparatus for processing a video signal. The present invention can acquire an inter-view motion vector of a current block, acquire a first corresponding block by using the inter-view motion vector, identify a prediction method of the first corresponding block, acquire a second corresponding block when the first corresponding block is not coded by a time inter prediction, acquire a time motion vector of the second corresponding block, acquire a time motion vector of the current block by using the time motion vector of the second corresponding block, and decode the current block by using the time motion vector of the current block.