公开(公告)号：US20220217405A1

公开(公告)日：2022-07-07

申请号：US17600509

申请日：2020-03-19

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jaehyun LIM ,  Jie ZHAO

IPC: H04N19/70 ,  H04N19/103 ,  H04N19/117 ,  H04N19/124 ,  H04N19/132 ,  H04N19/18 ,  H04N19/61 ,  H04N19/503 ,  H04N19/169

Abstract: According to the present disclosure, ALF parameters and/or LMCS parameters can be hierarchically signaled, thereby enabling a reduction in the amount of data to be signaled for video/image coding and an increase in the coding efficiency.

公开(公告)号：US20220201279A1

公开(公告)日：2022-06-23

申请号：US17441841

申请日：2020-03-18

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jin HEO ,  Seunghwan KIM ,  Jaehyun LIM ,  Ling LI

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: A method for decoding an image by a decoding device according to the present document comprises the steps of: receiving prediction-related information of a current block; deriving an intra prediction type of the current block on the basis of the prediction-related information; forming an intra prediction mode candidate list of the current block on the basis of intra prediction modes of blocks neighboring the current block; deriving an intra prediction mode of the current block on the basis of the intra prediction mode candidate list; and deriving reference samples of the current block on the basis of the intra prediction type and the intra prediction mode, and deriving a prediction sample on the basis of the reference samples.

公开(公告)号：US20220191478A1

公开(公告)日：2022-06-16

申请号：US17442046

申请日：2020-03-18

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jin HEO ,  Seunghwan KIM ,  Jaehyun LIM ,  Ling LI

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/105

Abstract: According to embodiments of the present document, an intra-prediction mode candidate list of a current block can be constructed by means of a process of constructing a common intra-prediction mode list with respect to intra-prediction types. Therefore, the dependency of the intra-prediction types in the process of constructing the intra-prediction mode list is reduced, and thus the coding efficiency of an intra-prediction can be enhanced.

公开(公告)号：US20220182668A1

公开(公告)日：2022-06-09

申请号：US17677598

申请日：2022-02-22

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Seunghwan KIM ,  Jin HEO ,  Jungah CHOI ,  Sunmi YOO

IPC: H04N19/593 ,  H04N19/70 ,  H04N19/176 ,  H04N19/132 ,  H04N19/30 ,  H04N19/159 ,  H04N19/105

Abstract: According to one embodiment of the present document, a method for performing efficient intra prediction can be presented. In one embodiment, an MIP procedure can be performed regardless of requirements related to the form of a current block to be coded, and thus signaling is simplified and hardware implementation can have advantages.

公开(公告)号：US20220182639A1

公开(公告)日：2022-06-09

申请号：US17677603

申请日：2022-02-22

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Jungah CHOI ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: According to an embodiment of the present document, in a matrix-based intra prediction (MIP) procedure, the MIP procedure can be performed without conditional restrictions associated with the shapes of blocks, and efficiency for performing MIP can be improved.

公开(公告)号：US20220159291A1

公开(公告)日：2022-05-19

申请号：US17438276

申请日：2020-03-10

Applicant: LG ELECTRONICS INC.

Inventor： Mehdi SALEHIFAR ,  Seunghwan KIM

IPC: H04N19/52 ,  H04N19/139 ,  H04N19/109 ,  H04N19/176

Abstract: Embodiments of the present specification provide a method and a device for processing motion vector difference (MVD) information for inter prediction in a video signal. A method for decoding MVD information, according to one embodiment of the present specification, comprises the steps of: acquiring a first flag indicating whether a MVD for predicting the current block is greater than a first value; on the basis of the first flag, acquiring a second flag indicating whether the MVD is greater than a second value; and decoding size information of the MVD on the basis of the second flag, wherein a step for acquiring the size information of the MVD comprises a step for, if the MVD is equal to or smaller than the second value, decoding the size information of the MVD on the basis of a first difference value which corresponds to the difference between the second value and the first value.

公开(公告)号：US20220150539A1

公开(公告)日：2022-05-12

申请号：US17435656

申请日：2020-03-05

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/593 ,  H04N19/186 ,  H04N19/132 ,  H04N19/176 ,  H04N19/85 ,  H04N19/30 ,  H04N19/117 ,  H04N19/11

Abstract: According to the disclosure of the present document, reshaper data and/or an ALF parameter can be signaled adaptively from a parameter set, thereby reducing the amount of data to be signaled for video/image coding and improving coding efficiency.

公开(公告)号：US20220150481A1

公开(公告)日：2022-05-12

申请号：US17435805

申请日：2020-03-06

Applicant: LG ELECTRONICS INC.

Inventor： Seunghwan KIM ,  Seethal PALURI

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/159 ,  H04N19/196 ,  H04N19/176

Abstract: According to the present disclosure, reshaper data and/or ALF parameters can be signaled from a parameter set on the basis of type information, which enables a reduction in the amount of data to be signaled for video/image coding and an increase in the coding efficiency.

公开(公告)号：US20220124352A1

公开(公告)日：2022-04-21

申请号：US17566620

申请日：2021-12-30

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seunghwan KIM

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/593 ,  H04N19/30 ,  H04N19/105

Abstract: According to the disclosure of the present document, a chroma residual scaling factor is derived on the basis of information relating to an absolute value of a chroma residual scaling delta value and information relating to a sign of the chroma residual scaling delta value, and an LMCS procedure can be efficiently performed by applying explicit signaling to information relating to a value(s) of the chroma residual scaling factor.

公开(公告)号：US20220124351A1

公开(公告)日：2022-04-21

申请号：US17562923

申请日：2021-12-27

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/18 ,  H04N19/11 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184 ,  H04N19/593 ,  H04N19/61 ,  H04N19/91

Abstract: An image decoding method according to the present disclosure includes deriving transform coefficients through dequantization based on the quantized transform coefficients for the target block; deriving modified transform coefficients based on an inverse reduced secondary transform (RST) for the transform coefficients; deriving residual samples for the target block based on an inverse primary transform for the modified transform coefficients; and generating a reconstructed samples based on the residual samples, and prediction samples derived based on an intra prediction mode for the target block, wherein the inverse RST is performed based on a transform kernel matrix selected from a transform set including a plurality of transform kernel matrices, the transform set is determined based on a mapping relationship according to the intra prediction mode applied to the target block, and a plurality of intra prediction modes including the intra prediction mode of the target block are mapped to one transform set.