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：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：US11606557B2

公开(公告)日：2023-03-14

申请号：US17343274

申请日：2021-06-09

Applicant: LG ELECTRONICS INC.

Inventor： Bumshik Lee ,  Moonmo Koo ,  Jaehyun Lim

IPC: H04N19/176 ,  H04N19/61 ,  H04N19/625 ,  H04N19/12

Abstract: The present disclosure relates to a method for processing a video signal by using a linear relationship between transform types, 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 a video signal, wherein the transform combination index indicates anyone of a plurality of transform combinations in the transform group; deriving a transform combination corresponding to the transform combination index, wherein the transform combination consists of a horizontal transform and a vertical transform, and includes DST-7 or DCT-8; performing inverse transform on the current block on the basis of the transform combination; and restoring the video signal by using the inverse transformed current block.

公开(公告)号：US11070806B2

公开(公告)日：2021-07-20

申请号：US16627107

申请日：2018-06-28

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

Inventor： Bumshik Lee ,  Moonmo Koo ,  Jaehyun Lim

IPC: H04N19/176 ,  H04N19/61 ,  H04N19/12 ,  H04N19/625

Abstract: The present disclosure relates to a method for processing a video signal by using a linear relationship between transform types, 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 a video signal, wherein the transform combination index indicates anyone of a plurality of transform combinations in the transform group; deriving a transform combination corresponding to the transform combination index, wherein the transform combination consists of a horizontal transform and a vertical transform, and includes DST-7 or DCT-8; performing inverse transform on the current block on the basis of the transform combination; and restoring the video signal by using the inverse transformed current block.

公开(公告)号：US10812807B2

公开(公告)日：2020-10-20

申请号：US16306837

申请日：2016-06-03

Applicant: LG ELECTRONICS INC.

Inventor： Hyeongmoon Jang ,  Bumshik Lee

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/33 ,  H04N19/46 ,  H04N19/117 ,  H04N19/184 ,  H04N19/11 ,  H04N19/182

Abstract: An intra-prediction method according to the present invention comprises the steps of: obtaining information on an intra-prediction mode from a bitstream; determining an intra-prediction mode for a current block on the basis of the information on the intra-prediction mode; determining whether to apply coefficient induced intra-prediction (CIIP) to the current block; deriving neighboring samples of the current block on the basis of the determination of whether to apply the CIIP; and generating predicted samples of the current block on the basis of the intra-prediction mode and the neighboring samples. According to the present invention, corrected or improved neighboring samples can be generated, whereby intra-prediction performance can be improved.

公开(公告)号：US10742988B2

公开(公告)日：2020-08-11

申请号：US15550721

申请日：2016-02-04

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Jin Heo ,  Eunyong Son ,  Sehoon Yea ,  Seungwook Park ,  Kyuwoon Kim ,  Bumshik Lee

IPC: H04N19/14 ,  H04N19/96 ,  H04N19/122 ,  H04N19/119 ,  H04N19/61 ,  H04N19/176

Abstract: The present invention provides a method of decoding a video signal using graph-based transform comprising the steps: extracting prediction unit partition information of a current coding unit from the video signal; obtaining a graph-based transform kernel from predetermined table information based on the prediction unit partition information; and performing an inverse-transform of a transform unit using the graph-based transform kernel, wherein the graph-based transform kernel corresponds to at least one of the prediction unit partition information and an edge weight, and the edge weight is a predetermined value representing a correlation between pixels.

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：US10785478B2

公开(公告)日：2020-09-22

申请号：US16301088

申请日：2016-05-12

Applicant: LG Electronics Inc.

Inventor： Sunmi Yoo ,  Bumshik Lee

IPC: H04N19/192 ,  H04N19/11 ,  H04N19/105 ,  H04N19/593 ,  H04N19/132 ,  H04N19/159 ,  H04N19/124 ,  H04N19/176 ,  H04N19/46

Abstract: A picture encoding method that includes 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.

公开(公告)号：US20200213621A1

公开(公告)日：2020-07-02

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：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.