公开(公告)号：US20250016321A1

公开(公告)日：2025-01-09

申请号：US18893718

申请日：2024-09-23

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：US20250008089A1

公开(公告)日：2025-01-02

申请号：US18824053

申请日：2024-09-04

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/105 ,  H04N19/126 ,  H04N19/132 ,  H04N19/139 ,  H04N19/17 ,  H04N19/30 ,  H04N19/70

Abstract: According to the disclosure of the present document, scaling list data and scaling list-related information may be hierarchically signaled, thereby enabling a reduction in data volume to be signaled for video/image coding and an increase in coding efficiency.

公开(公告)号：US20240422339A1

公开(公告)日：2024-12-19

申请号：US18815575

申请日：2024-08-26

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/46 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

Abstract: According to the disclosure of the present documents, a quantization parameter used in a scaling process of a quantized escape value in a palette mode may be derived on the basis of minimum quantization parameter information relating to a transform skip mode. Accordingly, the amount of data required to be signaled for video/image coding can be reduced and escape coding in a palette mode can be effectively performed.

公开(公告)号：US20240414354A1

公开(公告)日：2024-12-12

申请号：US18697628

申请日：2022-09-30

Applicant: LG Electronics Inc.

Inventor： Seunghwan KIM ,  Jie ZHAO ,  Seethal PALURI

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70

Abstract: According to one embodiment of the present disclosure, a method by which a decoding device decodes an image is provided. The method comprises the steps of: acquiring image information from a bit-stream; determining whether at least one from among a template-based inter mode derivation (TIMD) mode and decoder-side intra mode derivation (DIMD) mode is applied to the current block; generating a prediction sample of the current block on the basis of the at least one from among the TIMD mode and DIMD mode; and generating a reconstructed sample of the current block on the basis of the prediction sample of the current block, wherein the TIMD mode is derived from a template of the current block and the DIMD mode is derived on the basis of the gradient of adjacent reference samples of the current block.

公开(公告)号：US20240397113A1

公开(公告)日：2024-11-28

申请号：US18795627

申请日：2024-08-06

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/82 ,  H04N19/117 ,  H04N19/132 ,  H04N19/167 ,  H04N19/172 ,  H04N19/70

Abstract: A decoding method performed by a decoding apparatus, according to embodiments of the present document, may comprise the steps of: acquiring, via a bitstream, image information including residual information; generating reconstructed samples of a current picture on the basis of the residual information; and generating modified reconstructed samples by performing an in-loop filtering procedure on the reconstructed samples of the current picture, wherein whether or not the in-loop filtering procedure is performed across virtual boundaries is determined. The virtual boundaries can bring, to the decoding apparatus, advantages from a hardware perspective.

公开(公告)号：US20240397111A1

公开(公告)日：2024-11-28

申请号：US18791903

申请日：2024-08-01

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/82 ,  H04N19/103 ,  H04N19/117 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61 ,  H04N19/70

Abstract: In a decoding method performed by a decoding apparatus according to embodiments of the present document, whether signaling of information related to virtual boundaries is present in a sequence parameter set (SPS) or picture header information may be determined based on a virtual boundaries enabled flag.

公开(公告)号：US20240397048A1

公开(公告)日：2024-11-28

申请号：US18791990

申请日：2024-08-01

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seunghwan KIM ,  Seethal PALURI

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining CU chroma QP offset-related information for a current chroma block on the basis of the size and tree type of the current chroma block; deriving a chroma QP for the current chroma block on the basis of the CU chroma QP offset-related information; deriving residual samples for the current chroma block on the basis of the chroma QP; and generating a reconstructed picture on the basis of the residual samples, wherein the CU chroma QP offset-related information includes a CU chroma QP offset flag and a CU chroma QP offset index for the current chroma block.

公开(公告)号：US20240388737A1

公开(公告)日：2024-11-21

申请号：US18785150

申请日：2024-07-26

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/132 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/18 ,  H04N19/30

Abstract: According to the disclosure of the present document, scaling list data delivered in an adaptation parameter set (APS) may be signaled through a hierarchical structure, and the amount of data that needs to be signaled for video/image coding may be reduced and implementation may be facilitated by placing limits on the scaling list data delivered in the APS.

公开(公告)号：US20240373026A1

公开(公告)日：2024-11-07

申请号：US18773887

申请日：2024-07-16

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image decoding method according to the present document may comprise the steps of: if a current block is partitioned into sub-partition transform blocks, deriving a prediction sample of the current block on the basis of intra prediction mode information; determining an LFNST set including LFNST matrices on the basis of an intra prediction mode derived from the intra prediction mode information; selecting one of the LFNST matrices on the basis of the LFNST set and the LFNST index; deriving transform coefficients for the sub-partition transform blocks on the basis of the selected LFNST matrix; and deriving residual samples for the current block on the basis of the transform coefficients.

公开(公告)号：US20240373014A1

公开(公告)日：2024-11-07

申请号：US18772834

申请日：2024-07-15

Applicant: LG Electronics Inc.

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

IPC: H04N19/124 ,  H04N19/129 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: An image decoding method, which is performed by a decoding device according to the present document, is characterized by including: a step for receiving a bitstream including residual information about the current block; a step for deriving a maximum value of the number of context-encoding bins for context syntax elements coded on the basis of context included in the residual information; a step for entropy-decoding the context syntax elements on the basis of the maximum value; a step for deriving conversion coefficients for the current block on the basis of the entropy-decoded context syntax elements; a step for deriving a residual sample for the current block on the basis of the conversion coefficients; and a step for generating a reconstructed picture on the basis of the residual sample for the current block.