公开(公告)号：US20220385903A1

公开(公告)日：2022-12-01

申请号：US17765948

申请日：2020-10-05

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI

IPC: H04N19/12 ,  H04N19/176 ,  H04N19/124 ,  H04N19/60 ,  H04N19/132 ,  H04N19/70

Abstract: According to the disclosure of the present document, transform skip availability information and palette availability information are signaled via a sequence parameter set (SPS), and transform skip- and/or palette coding-related information can be effectively parsed/signaled on the basis of at least one of the transform skip availability information and the palette availability information. 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：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：US20220368895A1

公开(公告)日：2022-11-17

申请号：US17871727

申请日：2022-07-22

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593

Abstract: Embodiments of the present specification provide a method and a device for processing a video signal for intra prediction. A method for decoding a video signal according an embodiment of the present disclosure includes: obtaining intra prediction information of a current block to which the intra prediction is applied, in which the intra prediction information includes a first flag indicating a predetermined first mode; determining an intra prediction mode of the current block based on the intra prediction information, wherein when the first flag corresponds to a first value, the first mode is determined as the intra prediction mode and when the first flag corresponds to a second value, one of a plurality of candidate modes is determined as the intra prediction mode; and generating a prediction sample of the current block based on the intra prediction mode and a reference sample in a current picture. A separate flag indicating whether to use a primarily used specific mode is used to reduce a data amount for transmission of the intra prediction mode and a processing time of information of the intra prediction.

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.

公开(公告)号：US20220264118A1

公开(公告)日：2022-08-18

申请号：US17629981

申请日：2020-08-26

Applicant: LG Electronics Inc.

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

IPC: H04N19/176 ,  H04N19/132 ,  H04N19/70 ,  H04N19/12

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining, through a bitstream, image information including a motion information candidate index and residual information; deriving motion information of a current block on the basis of the motion information candidate index; deriving a prediction sample on the basis of the motion information; deriving, on the basis of residual syntax elements for a current residual coefficient in the current block, the current residual coefficient; deriving a residual sample on the basis of the current residual coefficient; and deriving a reconstruction sample of the current block on the basis of the prediction sample and the residual sample.

公开(公告)号：US20220264099A1

公开(公告)日：2022-08-18

申请号：US17629958

申请日：2020-08-26

Applicant: LG Electronics Inc.

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

IPC: H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/12 ,  H04N19/70

Abstract: A method for decoding a video performed by a decoding device according to the present document is characterized by comprising: a step for acquiring video information including prediction mode information and residual information through a bitstream; a step for deriving a prediction mode of a current block on the basis of the prediction mode information; a step for deriving a prediction sample on the basis of the prediction mode; a step for deriving a current residual coefficient on the basis of residual syntax elements for the current residual coefficient in the current block; a step for deriving a residual sample on the basis of the current residual coefficient; and a step for deriving a reconstructed sample of the current block on the basis of the prediction sample and the residual sample.

公开(公告)号：US20220256160A1

公开(公告)日：2022-08-11

申请号：US17610943

申请日：2020-06-17

Applicant: LG Electronics Inc.

Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

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

Abstract: An image decoding method performed by a decoding device according to this document comprises the steps of: determining whether the width and the height of a current block are smaller than or equal to the size of a maximum transform block; when the width and the height are smaller than or equal to the size of the maximum transform block, obtaining a BDPCM flag representing whether or not to apply BDPCM for the current block; deriving prediction samples for first and second samples of the current block on the basis of the BDPCM flag; deriving residual samples on the basis of received residual information; and deriving reconstructed samples for the first and second samples on the basis of the prediction samples and the residual samples.

公开(公告)号：US20220191512A1

公开(公告)日：2022-06-16

申请号：US17547753

申请日：2021-12-10

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Jungah CHOI ,  Seung Hwan KIM

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/119 ,  H04N19/593 ,  H04N19/105 ,  H04N19/186

Abstract: An image encoding/decoding method and method are provided. An image decoding method performed by an image decoding apparatus includes obtaining partitioning information of an image from a bitstream, determining a current block by partitioning the image based on the partitioning information, identifying a neighboring block located around the current block, identifying whether a prediction mode of the neighboring block is an MIP (matrix based intra prediction) mode, generating a candidate mode list of the current block based on a predetermined candidate mode, based on the prediction mode of the neighboring block being an MIP mode, and determining a prediction mode of the current block based on the candidate mode list.

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.