公开(公告)号：US20230119780A1

公开(公告)日：2023-04-20

申请号：US17987732

申请日：2022-11-15

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/136 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include identifying a prediction mode of a current block, determining a candidate intra prediction mode for the current block, based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block being an intra prediction mode, generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode, and determine an intra prediction mode of the current block based on the candidate intra prediction mode list. In this case, the candidate intra prediction mode may be determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode.

公开(公告)号：US20230079866A1

公开(公告)日：2023-03-16

申请号：US17797925

申请日：2021-02-05

Applicant: LG Electronics Inc.

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

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring prediction-related information for a current block; acquiring a dependent quantization enable flag related to whether dependent quantization is available; acquiring, on the basis of the dependent quantization enable flag, a transform skip residual coding (TSRC) enable flag related to whether TSRC is available; acquiring residual information of residual coding syntax for the current block, which has been derived on the basis of the TSRC enable flag; deriving motion information of the current block on the basis of the prediction-related information; deriving a prediction sample of the current block on the basis of the motion information; 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 prediction sample and the residual sample.

公开(公告)号：US20230024570A1

公开(公告)日：2023-01-26

申请号：US17946807

申请日：2022-09-16

Applicant: LG Electronics Inc.

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

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/136 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may include parsing, from a bitstream, first information specifying whether block difference pulse code modulation (BDPCM) applies to an intra-predicted current block, determining a prediction direction of BDPCM for the current block and generating a residual block of the current block based on the determined prediction direction of BDPCM, based on the first information specifying that BDPCM applies to the current block, generating a prediction block of the current block, by performing intra prediction based on an intra prediction mode of the current block, and reconstructing the current block based on the residual block and the prediction block.

公开(公告)号：US20220408095A1

公开(公告)日：2022-12-22

申请号：US17894026

申请日：2022-08-23

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring a transform skip available flag; acquiring a TSRC available flag on the basis of the transform skip available flag; acquiring prediction-related information regarding a current block; deriving a prediction sample of the current block on the basis of the prediction-related information; acquiring residual information of a residual coding syntax for the current block, derived on the basis of the TSRC available 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 prediction sample and the residual sample.

公开(公告)号：US20220385925A1

公开(公告)日：2022-12-01

申请号：US17882934

申请日：2022-08-08

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/18 ,  H04N19/70 ,  H04N19/176 ,  H04N19/12

Abstract: An image decoding method according to the present document comprises the steps of: receiving a bitstream including residual information; deriving a quantized transform coefficient for a current block on the basis of the residual information included in the bitstream; deriving a residual sample for the current block on the basis of the quantized transform coefficient; and generating a reconstructed picture on the basis of the residual sample for the current block, wherein the residual information may be derived via different syntax elements depending on whether a transform has been applied to the current block.

公开(公告)号：US20220377345A1

公开(公告)日：2022-11-24

申请号：US17765740

申请日：2020-10-06

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/136 ,  H04N19/169 ,  H04N19/176 ,  H04N19/70

Abstract: A video decoding method performed by a decoding apparatus according to the present document may comprise the steps of: acquiring, from a bitstream, information indicating a level value of a transform coefficient in a current block; deriving a Rice parameter for the information indicating the level value of the transform coefficient, on the basis of a quantization parameter of the current block; deriving a bin string for the information indicating the level value of the transform coefficient, on the basis of the Rice parameter; and deriving the level value of the transform coefficient on the basis of the bin string.

公开(公告)号：US20220353507A1

公开(公告)日：2022-11-03

申请号：US17848634

申请日：2022-06-24

Applicant: LG Electronics Inc.

Inventor： Jin HEO ,  Hyeong Moon JANG ,  Jangwon CHOI

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus include features of generating a prediction block by performing intra prediction on a current block, determining whether to apply position dependent intra prediction combination (PDPC) to the prediction block, and generating a final prediction block of the current block, by applying PDPC to the prediction block based on the determination. The determining whether to apply PDPC to the prediction block may include determining whether a size of the current block satisfies a predetermined condition. Based on the size of the current block satisfying the predetermined condition, it may be determined to apply PDPC to the prediction block. Based on the size of the current block not satisfying the predetermined condition, a determination of a color component of the current block may be skipped and it may be determined not to apply PDPC to the prediction block.

公开(公告)号：US20220345737A1

公开(公告)日：2022-10-27

申请号：US17849516

申请日：2022-06-24

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/46 ,  H04N19/70 ,  H04N19/186 ,  H04N19/176

Abstract: An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring image information including a Block-based Delta Pulse Code Modulation (BDPCM) available flag; and generating a reconstructed picture on the basis of the image information, wherein the BDPCM available flag relates to whether BDPCM is available for chroma and luma blocks.

公开(公告)号：US20220337829A1

公开(公告)日：2022-10-20

申请号：US17857322

申请日：2022-07-05

Applicant: LG Electronics Inc.

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

IPC: H04N19/117 ,  H04N19/82 ,  H04N19/132 ,  H04N19/186 ,  H04N19/176 ,  H04N19/46

Abstract: According to a disclosure of the present document, information associated with a deblocking filter for performing deblocking filtering may include chroma component filter parameter information associated with deblocking parameter offsets that are applied to a chroma component. The chroma component filter parameter information may be selectively signaled on the basis of a chroma tool offset presence flag. Therefore, an effect of increasing overall coding efficiency may be derived by signaling chroma component filter parameter information only in the case of not a monochrome color format.

公开(公告)号：US20220337823A1

公开(公告)日：2022-10-20

申请号：US17639260

申请日：2020-08-31

Applicant: LG Electronics Inc.

Inventor： Jangwon CHOI ,  Junghak NAM

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/132 ,  H04N19/70 ,  H04N19/174 ,  H04N19/169 ,  H04N19/176 ,  H04N19/80

Abstract: According to one embodiment of the present document, an in-loop filtering procedure in an image/video coding procedure may include a cross-component adaptive loop filtering procedure. CCALF according to the present embodiment can increase the accuracy of in-loop filtering.