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公开(公告)号:US20250097424A1
公开(公告)日:2025-03-20
申请号:US18962039
申请日:2024-11-27
Applicant: LG ELECTRONICS INC.
Inventor: Seethal PALURI , Hendry HENDRY , Seunghwan KIM , Jie ZHAO
IPC: H04N19/132 , H04N19/159 , H04N19/174 , H04N19/176 , H04N19/46 , H04N19/70
Abstract: A video decoding method performed by a video decoding device according to the present document comprises the steps of: acquiring image information from a bitstream, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header; parsing, from the picture header, a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; and generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of the first flag or the second flag.
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公开(公告)号:US20250088673A1
公开(公告)日:2025-03-13
申请号:US18960570
申请日:2024-11-26
Applicant: LG ELECTRONICS INC.
Inventor: Jungah CHOI , Jaehyun LIM , Sunmi YOO , Jangwon CHOI , Seunghwan KIM
IPC: H04N19/70 , H04N19/12 , H04N19/176 , H04N19/61
Abstract: A method for decoding an image by a decoding device, according to the present document, comprises the steps of: acquiring image information; and generating a reconstructed picture on the basis of the image information.
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公开(公告)号:US20250071310A1
公开(公告)日:2025-02-27
申请号:US18943680
申请日:2024-11-11
Applicant: LG ELECTRONICS INC.
Inventor: Hendry HENDRY , Seethal PALURI , Seunghwan KIM
IPC: H04N19/463 , H04N19/119 , H04N19/132 , H04N19/169 , H04N19/172 , H04N19/174 , H04N19/176
Abstract: A method for decoding an image by a decoding device, according to the present disclosure, can signal picture partitioning related information on the basis of a flag indicating whether sub-picture information exists and a flag indicating whether subpictures each include a single slice.
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124.
公开(公告)号:US20250008150A1
公开(公告)日:2025-01-02
申请号:US18882635
申请日:2024-09-11
Applicant: LG ELECTRONICS INC.
Inventor: Jane ZHAO , Seunghwan KIM
IPC: H04N19/56 , H04N19/176 , H04N19/513
Abstract: The disclosure discloses a method for processing video signals and an apparatus therefor. Specifically, the method of processing video signals based on inter prediction, comprising: configuring a merge candidate list based on a spatial neighboring block and a temporal neighboring block to a current block; adding a history-based merge candidate of the current block to the merge candidate list; obtaining a merge index indicating a merge candidate used for an inter prediction of the current block within the merge candidate list; generating a prediction sample of the current block based on motion information of the merge candidate indicated by the merge index; and updating a history-based merge candidate list based on the motion information.
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公开(公告)号:US20240414338A1
公开(公告)日:2024-12-12
申请号:US18806103
申请日:2024-08-15
Applicant: LG Electronics Inc.
Inventor: Moonmo KOO , Jaehyun LIM , Seunghwan KIM , Mehdi SALEHIFAR
IPC: H04N19/122 , H04N19/124 , H04N19/132 , H04N19/136 , H04N19/176 , H04N19/18 , H04N19/184 , H04N19/61 , H04N19/96
Abstract: An image decoding method according to the present document can comprise the steps of: deriving a transform coefficient for a current block on the basis of residual information; determining whether an effective coefficient is in a second area that excludes the upper left first area of the current block; parsing an MTS index from a bitstream if the effective coefficient is not in the second area; and deriving a residual sample by applying, to transform coefficients of the first area, an MTS kernel derived on the basis of the MTS index.
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公开(公告)号:US20240406394A1
公开(公告)日:2024-12-05
申请号:US18749048
申请日:2024-06-20
Applicant: LG Electronics Inc.
Inventor: Moonmo KOO , Seunghwan KIM , Mehdi SALEHIFAR , Jaehyun LIM
IPC: H04N19/122 , H04N19/11 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/18 , H04N19/46
Abstract: A video decoding method according to the present document comprises the steps of: deriving transform coefficients by performing de-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) 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 an inverse RST using a transform kernel matrix is performed on transform coefficients of an upper-left 4×4 region of an 8×8 region of the target block, and modified transform coefficients of the upper-left 4×4 region, an upper-right 4×4 region, and a lower-left 4×4 region of the 8×8 region are derived through the inverse RST.
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公开(公告)号:US20240397051A1
公开(公告)日:2024-11-28
申请号:US18793081
申请日:2024-08-02
Applicant: LG ELECTRONICS INC.
Inventor: Hendry HENDRY , Seethal PALURI , Seunghwan KIM
IPC: H04N19/132 , H04N19/117 , H04N19/176 , H04N19/82
Abstract: In relation to an in-loop filtering procedure described in the present document, a virtual boundary is defined so as to further increase the subjective/objective visual quality of a restored picture and the in-loop filtering procedure can be applied across the virtual boundary. The virtual boundary can include, for example, a discontinuous edge such as a 360-degree image, a VR image, or picture in picture (PIP). For example, the virtual boundary can be at a predetermined appointed position, and the existence and/or the position thereof can be signaled. Embodiments of the present document present a method for efficiently signaling virtual boundary-related information.
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128.
公开(公告)号:US20240380910A1
公开(公告)日:2024-11-14
申请号:US18782189
申请日:2024-07-24
Applicant: LG Electronics Inc.
Inventor: Sunmi YOO , Jungah CHOI , Seunghwan KIM
IPC: H04N19/46 , H04N19/103 , H04N19/136 , H04N19/176
Abstract: A video decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: receiving residual information for a current block; deriving a context model for a sine flag of a current residual coefficient in a current sub-block of the current block; decoding the sine flag on the basis of the context model; deriving the current residual coefficient on the basis of the sine flag; deriving a residual sample on the basis of the current residual coefficient; and generating a reconstructed picture on the basis of the residual sample, wherein the context model for the sine flag is derived on the basis of a sine flag of a residual coefficient decoded before the current residual coefficient in the current sub-block.
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公开(公告)号:US20240357176A1
公开(公告)日:2024-10-24
申请号:US18602103
申请日:2024-03-12
Applicant: LG Electronics Inc.
Inventor: Moonmo KOO , Jaehyun LIM , Seunghwan KIM
IPC: H04N19/625 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/18 , H04N19/70
CPC classification number: H04N19/625 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/18 , H04N19/70
Abstract: A method for processing a video includes determining a horizontal transform type index for a horizontal transform kernel and a vertical transform type index for a vertical transform kernel of a transform block in the video signal, determining a transform region in which a significant transform coefficient exists in the transform block based on the horizontal transform type index, the vertical transform type index, and a size of the transform block, and applying inverse-transform to the transform region based on the horizontal transform type index and the vertical transform type index. A width of the transform region is determined based on a comparison between the horizontal transform type index and a reference value and a height of the transform region is determined based on a comparison between the vertical transform type index and the reference value.
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公开(公告)号:US20240357077A1
公开(公告)日:2024-10-24
申请号:US18632155
申请日:2024-04-10
Applicant: LG ELECTRONICS INC.
Inventor: Ling LI , Jaehyun Lim , Jin Heo , Janwon Choi , Seunghwan KIM
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/46
CPC classification number: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/46
Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining intra prediction information including at least one of MPM flag information, MRL index information, and planner flag information from a bitstream; checking the MPM flag information; checking the MRL index information on the basis of a case where the MPM flag information indicates that the MRL index information is checked; checking the planner flag information on the basis of a case where a value of the MRL index information is 0; deriving an intra prediction mode for a current block on the basis of the check for the planner flag information; deriving prediction samples for the current block on the basis of the intra prediction mode for the current block; and generating a reconstructed picture on the basis of the prediction samples.
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