公开(公告)号：US20150271523A1

公开(公告)日：2015-09-24

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

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.

Abstract translation: 根据本发明的视频信号解码方法包括获取与当前视图纹理块相对应的相邻视图纹理块的加权值预测数据，通过使用加权值预测导出当前视图纹理块的加权值预测数据 相邻视图纹理块的数据，并且通过使用导出的加权值预测数据对当前视图纹理块进行加权值补偿。

公开(公告)号：US20150055702A1

公开(公告)日：2015-02-26

申请号：US14383357

申请日：2013-03-06

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N21/81 ,  H04N19/136

CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/82 ,  H04N21/816

Abstract: According to the present invention, a method of processing a video signal includes the steps of: receiving the depth data corresponding to a given block containing present pixels; determining a variation of the depth data; comparing the variation of the depth data with a predetermined value; if the variation is less than the predetermined value, coding the present pixels by using a first partial filter, and if the variation is greater than the predetermined value, coding the present pixels by using a second partial filter; wherein the second partial filter is applied to a wider range than the first partial filter. Accordingly the image quality of improved; the complexity according to the filter application is reduced; and at the same time variable filtering may improve the coding efficiency.

Abstract translation: 根据本发明，一种处理视频信号的方法包括以下步骤：接收对应于包含当前像素的给定块的深度数据; 确定深度数据的变化; 将深度数据的变化与预定值进行比较; 如果变化小于预定值，则通过使用第一部分滤波器对当前像素进行编码，并且如果变化大于预定值，则使用第二部分滤波器对当前像素进行编码; 其中所述第二部分滤波器被应用于比所述第一部分滤波器更宽的范围。 因此图像质量得到改善; 根据滤波器应用的复杂度降低; 并且同时可变滤波可以提高编码效率。

公开(公告)号：US20150043636A1

公开(公告)日：2015-02-12

申请号：US14383386

申请日：2013-03-07

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/597

CPC classification number: H04N19/597 ,  G06T3/0093 ,  H04N19/124 ,  H04N19/463 ,  H04N19/51 ,  H04N19/537 ,  H04N19/59

Abstract: The present invention encodes a warp map by using a video codec such as a multi-view texture image by a warp converter, and decodes a warp map by using a video codec such as a multi-view texture image by using a warp inverter. The present invention may incur less additional costs because it does not use a dedicated warp map coder. In addition, the present invention may convert a warp map by using a warp map converter and send the converted map to an encoder and invert decoded warp map information by using a warp map inverter so that the warp map is encoded and decoded by using a video codec such as a multi-view texture image. In addition, it is possible to increase compatibility by enabling various kinds of supplementary data to be used. In addition, it is possible to increase technique compatibility by simply applying a warp map scheme to a 3D video coding technique using a depth map.

Abstract translation: 本发明通过使用诸如多维视图纹理图像的视频编解码器通过warp转换器对经线图进行编码，并且通过使用经线逆变器通过使用诸如多视图纹理图像的视频编解码器来解码经线图。 由于本发明不使用专用的经线图编码器，所以本发明可能会增加额外的成本。 此外，本发明可以通过使用经线映射转换器来转换经线图，并将转换的映射发送到编码器，并使用经线映射反相器反转解码的经线图信息，从而通过使用视频对经线图进行编码和解码 编解码器如多视图纹理图像。 此外，可以通过使各种补充数据的使用来提高兼容性。 此外，通过简单地将翘曲映射方案应用于使用深度图的3D视频编码技术，可以提高技术兼容性。

公开(公告)号：US12284356B2

公开(公告)日：2025-04-22

申请号：US18676359

申请日：2024-05-28

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18

Abstract: A method for decoding an image by a decoding device according to the present invention comprises the steps of: deriving, from a bit stream, transform coefficients of a block to be decoded; deriving residual samples of the block to be decoded, on the basis of a selective transform of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples of the block to be decoded and prediction samples of the block to be decoded, wherein the selective transform is performed on the basis of a modified transform matrix, the modified transform matrix comprises a matrix including a modified basis vector, and the modified basis vector contains a certain number of elements selected from N elements.

公开(公告)号：US12273530B2

公开(公告)日：2025-04-08

申请号：US18442750

申请日：2024-02-15

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

IPC: H04N7/18 ,  G06F9/48 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N23/60

Abstract: An image decoding method according to the present document comprises a step of deriving a corrected transform coefficient, wherein the step of deriving the corrected transform coefficient comprises the steps of: determining whether LFNST can be applied to the height and width of a divided sub-partition block when an ISP is applied to a current block; parsing a LFNST index when the LFNST can be applied; and deriving the corrected transform coefficient on the basis of the LFNST index and a LFNST matrix.

公开(公告)号：US12273529B2

公开(公告)日：2025-04-08

申请号：US18369015

申请日：2023-09-15

Applicant: LG Electronics Inc.

Inventor： Moonmo Koo ,  Jaehyun Lim ,  Seunghwan Kim

IPC: H04N11/02 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

Abstract: An image decoding method includes a step of deriving a modified transform coefficient, wherein the step of deriving the modified transform coefficient includes the steps of: deriving a first variable indicating whether the transform coefficient exists in an area excluding a DC location of the current block; parsing an LFNST index based on the derivation result; and deriving the modified transform coefficient based on the LFNST index and an LFNST matrix, and based on the fact that the current block is divided into a plurality of sub-partition blocks, the LFNST index can be parsed without deriving the first variable.

公开(公告)号：US12273526B2

公开(公告)日：2025-04-08

申请号：US17767380

申请日：2020-10-08

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46

Abstract: An image decoding method according to the present document may be characterized by including the steps of: determining whether to parse an MTS index for applying MTS to the current block; and applying the MTS to the current block on the basis of the MTS index to derive residual samples for the current block, wherein whether to parse the MTS index is determined on the basis of a flag value indicating whether a transform coefficient for a luma component of the current block is present, and the MTS index is not parsed when the flag value is 0.

公开(公告)号：US12256103B2

公开(公告)日：2025-03-18

申请号：US18388108

申请日：2023-11-08

Applicant: LG Electronics Inc.

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

IPC: H04N19/61 ,  H04N19/11 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: An image decoding method according to the present specification comprises the steps of: deriving transform coefficients through inverse quantization on the basis of quantized transform coefficient for a target block; deriving modified transform coefficients on the basis of inverse reduced secondary transform (RST) of the transform coefficients; and generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein the step of deriving the modified transform coefficients is characterized in deriving 16 modified transform coefficients by applying a transform kernel matrix to 8 transform coefficients in a 4×4 region of the target block.

公开(公告)号：US12256102B2

公开(公告)日：2025-03-18

申请号：US18381790

申请日：2023-10-19

Applicant: LG Electronics Inc.

Inventor： Junghak Nam ,  Jaehyun Lim ,  Moonmo Koo ,  Seunghwan Kim

IPC: H04N19/60 ,  H04N19/122 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: An image decoding method according to the present document comprises the steps of: receiving image information including residual information for a current block; and generating residual samples of the current block on the basis of the residual information, wherein the residual information includes information on transform coefficients of the current block, and the residual samples are generated from the information on the transform coefficients on the basis of low-frequency non-separable transform (LFNST) index information.

公开(公告)号：US12244862B2

公开(公告)日：2025-03-04

申请号：US17767368

申请日：2020-10-08

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/176 ,  H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/18 ,  H04N19/186 ,  H04N19/61 ,  H04N19/70

Abstract: An image decoding method, according to the present document, comprises the steps of: deriving residual samples by applying at least one among LFNST or MTS to a transform coefficient; and generating a reconstructed picture on the basis of the residual samples, wherein the LFNST is carried out on the basis of a LFNST index indicating a LFNST kernel, the MTS is carried out on the basis of a MTS index indicating a MTS kernel, the MTS index is parsed on the basis that the color index of the current block is a luma component, and the LFNST index may be parsed regardless of the color index of the current block.