公开(公告)号：US20240357111A1

公开(公告)日：2024-10-24

申请号：US18573087

申请日：2022-07-06

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jie ZHAO ,  Moonmo KOO ,  Jaehyun LIM ,  Jangwon CHOI ,  Seung Hwan KIM

IPC: H04N19/122 ,  H04N19/176 ,  H04N19/196

CPC classification number: H04N19/122 ,  H04N19/176 ,  H04N19/196

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method comprises generating a residual block of a current block by performing inverse transform on the current block based on a predetermined non-separable primary transform matrix and reconstructing the current block based on the residual block. The non-separable primary transform matrix may be applied to all transform coefficients of the current block regardless of a size of the current block.

公开(公告)号：US20240348829A1

公开(公告)日：2024-10-17

申请号：US18742373

申请日：2024-06-13

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Jaehyun LIM ,  Junghak NAM ,  Seunghwan KIM ,  Mehdi SALEHIFAR

IPC: H04N19/61 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

CPC classification number: H04N19/61 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: A video transform method includes: receiving a quantized transform coefficient for a target block and a transform index for a non-separated secondary transform; inverse-quantizing the quantized transform coefficient; deriving an input transform coefficient size indicating the length of the inverse-quantized transform coefficient to which the non-separated secondary transform has been applied, an output transform coefficient size indicating the length of a modified transform coefficient to which the non-separated secondary transform has been applied, and a transform set mapped to the intra mode of the target block, when the transform index does not indicate that the non-separated secondary transform is not performed; and deriving the modified transform coefficient on the basis of a matrix operation on a transform kernel matrix in the transform set indicated by the transform index, and a transform coefficient list corresponding to the input transform coefficient size.

公开(公告)号：US20240348787A1

公开(公告)日：2024-10-17

申请号：US18732846

申请日：2024-06-04

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/30 ,  H04N19/46

CPC classification number: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/30 ,  H04N19/46

Abstract: An image decoding method according to the present document comprises the steps of: receiving a quantized transform coefficient for a target block and a transform index for a non-separable secondary transform; dequantizing the quantized transform coefficients to derive transform coefficients; deriving modified transform coefficients on the basis of a matrix operation of a transform kernel matrix in a transform set indicated by the transform index and a transform coefficient list corresponding to the magnitude of dequantized transform coefficients; clipping the modified transform coefficients to a predetermined range of values; and deriving residual samples for the target block on the basis of an inverse primary transform with respect to the modified transform coefficients clipped.

公开(公告)号：US20240314354A1

公开(公告)日：2024-09-19

申请号：US18671305

申请日：2024-05-22

Applicant: LG ELECTRONICS INC.

Inventor： Joonyoung PARK ,  Seungwook PARK ,  Jaehyun LIM ,  Jungsun KIM ,  Younghee CHOI ,  Jaewon SUNG ,  Byeongmoon JEON ,  Yongjoon JEON

IPC: H04N19/55 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/513 ,  H04N19/52 ,  H04N19/593 ,  H04N19/61 ,  H04N19/625

CPC classification number: H04N19/55 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/513 ,  H04N19/52 ,  H04N19/593 ,  H04N19/61 ,  H04N19/625

Abstract: The present invention relates to a method and apparatus for processing a video signal, which can increase the accuracy of the motion vector prediction through motion vector scaling which takes a difference in the temporal distance between reference pictures into consideration. To this end, the present invention provides a video signal processing method and a video signal processing apparatus using the same, and the method comprises the steps of: scaling at least one neighboring partition motion vector for a motion vector prediction of the current partition; scaling the neighboring partition motion vector, which has been selected, when the reference picture of the neighboring partition motion vector is different from the reference picture of the current partition; acquiring a motion vector prediction value of the current partition using the scaled motion vector; and acquiring a motion vector of the current partition using the motion vector prediction value.

公开(公告)号：US20240305811A1

公开(公告)日：2024-09-12

申请号：US18664111

申请日：2024-05-14

Applicant: LG ELECTRONICS INC.

Inventor： Jaehyun LIM ,  Jungsun KIM ,  Seungwook PARK ,  Jaewon SUNG ,  Byeongmoon JEON ,  Joonyoung PARK ,  Yongjoon JEON ,  Younghee CHOI

IPC: H04N19/52 ,  G06T9/00 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/31

CPC classification number: H04N19/52 ,  G06T9/004 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/31

Abstract: The present disclosure relates to a technique for encoding and decoding video data, and more particularly, to a method for performing inter-prediction in an effective manner. The present disclosure combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to propose a method for using the same candidate. The method for encoding video data proposed by the present disclosure comprises the following steps: receiving mode information on an inter-prediction method of a current block; determining, on the basis of the received mode information, whether the interprediction method to be applied to the current block is an AMVP mode or a merge mode; and selecting a candidate to derive motion information of the current block, wherein the candidate is selected in a left region, top region and corner region of the current block and in the same position block as the current block, and the AMVP mode and the merge mode are applied on the basis of the selected candidate.

公开(公告)号：US20240298031A1

公开(公告)日：2024-09-05

申请号：US18645950

申请日：2024-04-25

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Seunghwan KIM ,  Jaehyun LIM

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

CPC classification number: H04N19/61 ,  H04N19/11 ,  H04N19/124 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

Abstract: An image decoding method according to the present document comprises the steps of: deriving transform coefficients through inverse quantization on the basis of quantized transform coefficients for a target block; deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) for the transform coefficients; and generating, on the basis of an inverse primary transform for the modified transform coefficients, a restoration picture based on residual samples for the target block, wherein the modified transform coefficients derived according to the inverse RST are two-dimensionally arranged according to the order of a row priority direction or a column priority direction according to an intra prediction mode to be applied to the target block.

公开(公告)号：US20240296649A1

公开(公告)日：2024-09-05

申请号：US18571028

申请日：2022-06-15

Applicant: LG Electronics Inc.

Inventor： Chulkeun KIM ,  Jaehyun LIM

IPC: G06V10/42 ,  G06V10/25

CPC classification number: G06V10/42 ,  G06V10/25

Abstract: A method and apparatus for encoding/decoding feature information of an image and a computer-readable recording medium generated by the encoding method are provided. The encoding method comprises obtaining at least one feature map for a first image, determining at least one feature transform matrix for the feature map, and transforming a plurality of features included in the feature map based on the determined feature transform matrix. The at least one feature transform matrix may comprise a global feature transform matrix commonly applied to two or more features, and the global feature transform matrix may be generated in advance based on a predetermined feature data set obtained from a second image.

公开(公告)号：US20240291992A1

公开(公告)日：2024-08-29

申请号：US18571605

申请日：2022-06-16

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Jaehyun LIM ,  Seunghwan KIM ,  Jie ZHAO

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

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18

Abstract: An image decoding method according to this document comprises the steps of: deriving an LFNST matrix for a current block on the basis of an LFNST index derived from LFNST index information and an LFNST set index; deriving modified transform coefficients on the basis of transform coefficients and the LFNST matrix; and generating residual samples for the current block on the basis of the modified transform coefficients, wherein when the width or height of the current block has a value of 16 and both the width and height have a value of 16 or more, the LFNST matrix may be derived as a 96×32 dimensional matrix. Therefore, coding performance achievable by the LFNST can be maximized within the implementation complexity permitted in forthcoming standards.

公开(公告)号：US20240259596A1

公开(公告)日：2024-08-01

申请号：US18411992

申请日：2024-01-12

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo KOO ,  Seunghwan KIM ,  Jaehyun LIM

IPC: H04N19/60 ,  H04N19/122 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

CPC classification number: H04N19/60 ,  H04N19/122 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: An image decoding method according to the present document may comprise the steps of: deriving a first variable indicating whether there is a valid coefficient in a region excluding a DC region from a current block; deriving a second variable indicating whether there is a valid coefficient in a second region excluding a first region formed at the upper left end of the current block; when the first variable indicates that the valid coefficient exists in the region excluding the DC region, and the second variable indicates that the valid coefficient does not exist in the second region, parsing an LFNST index from the bitstream; and applying an LFNST matrix derived on the basis of the LFNST index to transform coefficients in the first region, to derive the modified transform coefficients.

公开(公告)号：US20240251084A1

公开(公告)日：2024-07-25

申请号：US18442750

申请日：2024-02-15

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo KOO ,  Seunghwan KIM ,  Jaehyun LIM

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

CPC classification number: H04N19/132 ,  G06F9/4812 ,  G06F9/4881 ,  H04N19/176 ,  H04N19/18 ,  H04N19/1883 ,  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.