公开(公告)号：US11109028B2

公开(公告)日：2021-08-31

申请号：US17117785

申请日：2020-12-10

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Mehdi Salehifar ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/122 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61

Abstract: Embodiments of the disclosure provide a method and apparatus for processing video signals. An image signal decoding method according to an embodiment of the disclosure comprises the steps of: determining, on the basis of the height and width of a current block, an input length and output length of a non-separable transform; determining a non-separable transform matrix corresponding to the input length and output length of the non-separable transform; and applying the non-separable transform matrix to the current block, wherein, when the height and width of the current block are 4 each, the input length and output length of the non-separable transform are determined to be 8 and 16 respectively.

公开(公告)号：US11082694B2

公开(公告)日：2021-08-03

申请号：US16901818

申请日：2020-06-15

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Mehdi Salehifar ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/122 ,  H04N19/167 ,  H04N19/176 ,  H04N19/61

Abstract: The embodiments of the present disclosure provides a method and apparatus for video signal processing. A method for decoding an image signal according to an embodiment of the present disclosure may include determining an input length and an output length of a non-separable transform based on a height and a width of a current block; determining a non-separable transform matrix corresponding to the input length and the output length of a non-separable transform; and applying the non-separable transform matrix to coefficients by a number of the input length in the current block, wherein the height and the width of a current block is greater than or equal to 8, wherein, if each of the height and the width of a current block is equal to 8, the input length of the non-separable transform is determined as 8.

公开(公告)号：US10924736B2

公开(公告)日：2021-02-16

申请号：US16898928

申请日：2020-06-11

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Mehdi Salehifar ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N19/122 ,  H04N19/61 ,  H04N19/159 ,  H04N19/176

Abstract: Embodiments of the disclosure provide a method and apparatus for processing video signals. An image signal decoding method according to an embodiment of the disclosure comprises the steps of: determining, on the basis of the height and width of a current block, an input length and output length of a non-separable transform; determining a non-separable transform matrix corresponding to the input length and output length of the non-separable transform; and applying the non-separable transform matrix to the current block, wherein, when the height and width of the current block are 4 each, the input length and output length of the non-separable transform are determined to be 8 and 16 respectively.

公开(公告)号：US10728571B2

公开(公告)日：2020-07-28

申请号：US15750093

申请日：2016-07-15

Applicant: LG Electronics Inc.

Inventor： Eunyong Son ,  Moonmo Koo ,  Hyeongmoon Jang ,  Seungwook Park ,  Yongjoon Jeon

IPC: H04N19/513 ,  H04N19/176 ,  H04N19/105 ,  H04N19/517 ,  H04N19/503 ,  H04N19/182 ,  H04N19/159 ,  H04N19/44

Abstract: A video decoding method performed by a decoding device includes: deriving control points (CPs) for a current block; acquiring motion vectors for the CPs; deriving a sample-unit motion vector in the current block based on the acquired motion vectors; deriving a prediction sample for the current block based on the sample-unit motion vector; and generating a restoration sample based on the prediction sample, wherein coordinates of a bottom-right sample position of the current block are (0, 0), and coordinates of CPO among the CPs are (0, 0). Inter prediction is effectively performed through sample-unit motion vectors even when an image in a current block is planarly moved and variously changed, and since motion vectors for CPs are derived based on already-decoded neighboring blocks, an amount of information for the motion vectors for the CPs and for a residual signal for the current block is reduced, improving overall coding efficiency.

公开(公告)号：US10602138B2

公开(公告)日：2020-03-24

申请号：US15755037

申请日：2016-08-25

Applicant: LG ELECTRONICS INC.

Inventor： Eunyong Son ,  Jin Heo ,  Seungwook Park ,  Yongjoon Jeon ,  Moonmo Koo

IPC: H04N19/11 ,  H04N19/186 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593

Abstract: An intra prediction method according to the present invention comprises the steps of: acquiring information on a luma prediction mode of a current block and information on a chroma prediction mode of the current block from a bit stream; deriving a luma intra prediction mode of the current block on the basis of the information on the luma prediction mode; determining a chroma intra prediction mode of the current block on the basis of information on the luma intra prediction mode and the information on the chroma prediction mode; and generating a chroma prediction sample of the current block on the basis of the chroma intra prediction mode. According to the present invention, it is possible to reflect the difference between the ratio of the width to the height of a luma component and the ratio of the width to the height of a chroma component, and thus to more accurately perform intra prediction in units of samples and improve intra prediction performance.

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：US10123007B2

公开(公告)日：2018-11-06

申请号：US14759383

申请日：2014-01-08

Applicant: LG ELECTRONICS INC.

Inventor： Jin Heo ,  Jiwook Jung ,  Sehoon Yea ,  Moonmo Koo ,  Taesup Kim ,  Jaewon Sung ,  Eunyong Son

IPC: H04N19/105 ,  H04N19/44 ,  H04N19/597 ,  H04N19/52 ,  H04N19/176

Abstract: The present invention relates to a method and an apparatus for coding a video signal, and more specifically, a motion vector between viewpoints is obtained by using a depth value of a depth block, which corresponds to a current texture block, and an illumination difference is compensated. By obtaining the motion vector between the viewpoints by using the depth value of the depth block, which corresponds to the current texture block, and compensating the illumination difference, the present invention can obtain an accurate prediction value of the current texture block and thus increase accuracy in inter-prediction between the viewpoints.

公开(公告)号：US09894384B2

公开(公告)日：2018-02-13

申请号：US14434282

申请日：2013-10-08

Applicant: LG ELECTRONICS INC.

Inventor： Jaewon Sung ,  Sehoon Yea ,  Moonmo Koo ,  Jin Heo ,  Taesup Kim ,  Jiwook Jung ,  Eunyong Son

IPC: H04N19/597 ,  H04N19/52 ,  H04N19/513 ,  H04N19/196 ,  H04N19/463 ,  H04N13/00 ,  H04N19/82

CPC classification number: H04N19/597 ,  H04N19/196 ,  H04N19/463 ,  H04N19/513 ,  H04N19/52 ,  H04N19/521 ,  H04N19/82

Abstract: The video signal decoding method according to the present invention involves acquiring weighting-value predicting data of a neighboring view texture block corresponding to the current view texture block, deriving weighting-value predicting data of the current view texture block by using the weighting-value predicting data of the neighboring view texture block, and subjecting the current view texture block to weighting-value compensation by using the derived weighting-value predicting data.

公开(公告)号：US09602831B2

公开(公告)日：2017-03-21

申请号：US14383491

申请日：2013-03-05

Applicant: LG ELECTRONICS INC.

Inventor： Jaewon Sung ,  Sehoon Yea ,  Moonmo Koo ,  Jin Heo ,  Taesup Kim ,  Jiwook Jung ,  Eunyong Son

IPC: H04N11/02 ,  H04N19/513 ,  H04N19/597 ,  H04N19/52 ,  H04N19/176 ,  H04N13/00

CPC classification number: H04N19/513 ,  H04N13/161 ,  H04N19/176 ,  H04N19/52 ,  H04N19/597

Abstract: The method for processing video signals according to the present invention determines a motion vector list including at least one of spatial motion vectors, temporal motion vectors, and variation vectors as motion vector candidates of a target block, extracts motion vector identifying information which specifies the motion vector candidates used as the predicted motion vectors of the target block, determines the motion vector candidates corresponding to the motion vector identifying information as the predicted motion vectors of the target block, and performs motion compensation on the basis of the predicted motion vectors. The present invention enables accurate motion vector prediction by forming motion vector candidates and induces motion vectors of a target block therefrom, and can enhance coding efficiency by reducing the amount of transmitted residual data.

公开(公告)号：US12262025B2

公开(公告)日：2025-03-25

申请号：US17963449

申请日：2022-10-11

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Jaehyun Lim ,  Seunghwan Kim ,  Mehdi Salehifar

IPC: H04N19/18 ,  H04N19/119 ,  H04N19/129 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70 ,  H04N19/96

Abstract: An image decoding method according to the present document comprises: a residual coding step for parsing residual information received in a residual coding level and arranging transform coefficients for a current block according to a predetermined scanning order; a step for deriving residual samples by applying at least one of LFNST or MTS to the transform coefficients; and a step for generating a reconstructed picture on the basis of the residual samples, wherein the LFNST is performed on the basis of an LFNST index indicating an LFNST kernel, the MTS is performed on the basis of an MTS index indicating an MTS kernel, the LFNST index and the MTS index are signaled in a coding unit level, and the MTS index is signaled immediately after the signaling of the LFNST index.