公开(公告)号：US20220417564A1

公开(公告)日：2022-12-29

申请号：US17777370

申请日：2020-11-17

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/82 ,  H04N19/136 ,  H04N19/132 ,  H04N19/103 ,  H04N19/172 ,  H04N19/117 ,  H04N19/70 ,  H04N19/167

Abstract: According to the embodiments of the present document, information necessary to control in-loop filtering performed across virtual boundaries can be efficiently signaled by a coding device. In one example, information related to whether in-loop filtering is available across virtual boundaries can be signaled.

公开(公告)号：US20220417518A1

公开(公告)日：2022-12-29

申请号：US17762150

申请日：2020-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo KOO ,  Jaehyun LIM ,  Seunghwan KIM

IPC: H04N19/132 ,  H04N19/119 ,  H04N19/18 ,  H04N19/176

Abstract: An image decoding method includes a step of deriving a residual sample, wherein the step of deriving the residual sample includes the steps of: when a current block is divided into sub-partition blocks, deriving a transform kernel for an inverse primary transform applied to a sub-partition block based on a horizontal or a vertical length of the sub-partition block; and deriving the residual sample from transform coefficients based on the transform kernel.

公开(公告)号：US20220400291A1

公开(公告)日：2022-12-15

申请号：US17777265

申请日：2020-11-17

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

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

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：US20220400286A1

公开(公告)日：2022-12-15

申请号：US17892740

申请日：2022-08-22

Applicant: LG Electronics Inc.

Inventor： Moonmo KOO ,  Jaehyun LIM ,  Seunghwan KIM

IPC: H04N19/61 ,  H04N19/18 ,  H04N19/169 ,  H04N19/176 ,  H04N19/124 ,  H04N19/186 ,  H04N19/12 ,  H04N19/70 ,  H04N19/157 ,  H04N19/132

Abstract: An image decoding method according to the present document comprises a step of deriving modified transform coefficients, wherein the step of deriving the modified transform coefficients comprises a step of setting an LFNST apply variable about whether to apply an LFNST on the basis of the tree type of the current block, a transform coefficient coding flag for each component of the current block, or a transform skip flag for each component of the current block, and can comprise a step of parsing an LFNST index on the basis of the value of the LFNST apply variable.

公开(公告)号：US20220400277A1

公开(公告)日：2022-12-15

申请号：US17891425

申请日：2022-08-19

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.

公开(公告)号：US20220400266A1

公开(公告)日：2022-12-15

申请号：US17775693

申请日：2020-11-09

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/186 ,  H04N19/18 ,  H04N19/176 ,  H04N19/46

Abstract: An image decoding method according to the present document comprises the steps of: determining whether or not an effective coefficient is present in a second area not including an upper-left first area of a current block; parsing an MTS index from a bitstream on the basis that the effective coefficient is not present in the second area; and deriving residual samples for the current block by applying a transform kernel, which is derived on the basis of the MTS index, to transform coefficients in the first area, wherein the MTS index can be parsed on the basis that the effective coefficient, which is present in a scan sub-block which is scanned for the effective coefficient, is not present in the second area.

公开(公告)号：US20220400250A1

公开(公告)日：2022-12-15

申请号：US17774101

申请日：2020-11-05

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seunghwan KIM ,  Jie ZHAO

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70

Abstract: According to the disclosure of this document, it is possible to signal information related to a chroma quantization parameter offset through a palette coding syntax, and to efficiently parse and signal index information for a chroma quantization parameter offset list on the basis of information about the number of entries in the chroma quantization parameter offset list. Accordingly, bits that need to be signaled for video/image coding can be reduced, and coding efficiency can be improved.

公开(公告)号：US20220377363A1

公开(公告)日：2022-11-24

申请号：US17745524

申请日：2022-05-16

Applicant: LG ELECTRONICS INC.

Inventor： Jane ZHAO ,  Seunghwan KIM

IPC: H04N19/51 ,  H04N19/176 ,  H04N19/423

Abstract: The disclosure discloses a method for processing a video signal and an apparatus therefor. Specifically, the method of processing a video signal based on an inter prediction, comprising: configuring a merge list based on a neighboring block of a current block; adding a history based merge candidate included in a history based merge candidate list to the merge list when a number of a merge candidate included in the merge list is smaller than a first predetermined number; obtaining a merge index indicating a merge candidate used for an inter prediction of the current block within the merge list; and generating a prediction block of the current block based on motion information of a merge candidate indicated by the merge index, wherein a step of adding the history based merge candidate to the merge list comprises checking whether a second predetermined number of the history based merge candidate within the history based merge candidate list has the same motion information as the merge candidate included in the merge list.

公开(公告)号：US20220377343A1

公开(公告)日：2022-11-24

申请号：US17882152

申请日：2022-08-05

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/18 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: The method for image decoding carried out by a decoding device, according to the present document, comprises the steps of: acquiring a transform skip residual coding (TSRC) availability flag relating to whether TSRC is available or not; acquiring residual information of residual coding syntax for a current block derived on the basis of the TSRC availability flag; deriving a residual sample of the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the residual sample, wherein the TSRC availability flag is acquired on the basis of a dependent quantization availability flag relating to whether dependent quantization is available or not.

公开(公告)号：US20220360784A1

公开(公告)日：2022-11-10

申请号：US17865959

申请日：2022-07-15

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/13 ,  H04N19/176 ,  H04N19/124 ,  H04N19/60 ,  H04N19/136

Abstract: An image decoding method includes receiving residual information including first size related information for a first residual coefficient and second size related information for a second residual coefficient, setting a Rice parameter of the first size related information and the second size related information as a specific value, deriving available binary values based on the Rice parameter, deriving binary values of the first size related information and the second size related information by decoding the first size related information and the second size related information, deriving values of the first size related information and the second size related information by comparing the binary values and the available binary values, deriving the first residual coefficient and the second residual coefficient based on the values, and reconstructing a current picture based on the first residual coefficient and the second residual coefficient.