公开(公告)号：US20220174272A1

公开(公告)日：2022-06-02

申请号：US17547835

申请日：2021-12-10

Applicant: LG ELECTRONICS INC.

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

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

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：US20220174271A1

公开(公告)日：2022-06-02

申请号：US17548156

申请日：2021-12-10

Applicant: LG ELECTRONICS INC.

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

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

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus includes determining an MPM (most probable mode) candidate of a current block based on a prediction mode of a neighboring block located around the current block, generating an MPM list of the current block based on the MPM candidate, and determining an MPM candidate identified by an intra prediction mode indicator among a plurality of MPM candidates included in the MPM list to be a prediction mode of the current block. The MPM candidate determined based on the prediction mode of the neighboring block may be determined to be a predetermined intra prediction mode, based on the prediction mode of any one of the current block and the neighboring block being a matrix based intra prediction mode.

公开(公告)号：US20250168386A1

公开(公告)日：2025-05-22

申请号：US18958123

申请日：2024-11-25

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seung Hwan KIM

IPC: H04N19/503 ,  H04N19/105 ,  H04N19/184 ,  H04N19/31

Abstract: An image encoding/decoding method and apparatus is provided. The image decoding method performed by the image decoding apparatus may comprise determining inter-layer direct reference and determining the number of sublayers of a current layer based on the inter-layer direct reference.

公开(公告)号：US20250024062A1

公开(公告)日：2025-01-16

申请号：US18901625

申请日：2024-09-30

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Jie ZHAO ,  Seung Hwan KIM

IPC: H04N19/46 ,  H04N19/132 ,  H04N19/14 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise obtaining, from a picture parameter set, a first signaling flag specifying whether an identifier of a subpicture splitting a current picture is signaled using the picture parameter set, obtaining identifier information of the subpicture from the picture parameter set, based on the first signaling flag specifying that the identifier of the subpicture is signaled using the picture parameter set, and decoding the current picture by decoding a current subpicture identified based on the identifier information.

公开(公告)号：US20240406396A1

公开(公告)日：2024-12-05

申请号：US18736349

申请日：2024-06-06

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seung Hwan KIM ,  Hendry HENDRY ,  Seethal PALURI

IPC: H04N19/124 ,  H04N19/119 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method performed by the image decoding apparatus, according to the present disclosure, may comprise the steps of: determining whether a color space transformation is applied to residual samples of a current block; determining quantization parameter of the current block on the basis of whether the color space transformation is applied; and determining a transformation coefficient of the current block on the basis of the quantization parameter. The step of determining the quantization parameter may be performed by limiting the range of an effective value of the quantization parameter such that a value of the quantization parameter has a value less than or equal to a predetermined upper value and greater than or equal to a predetermined lower value.

公开(公告)号：US20240364915A1

公开(公告)日：2024-10-31

申请号：US18764976

申请日：2024-07-05

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seung Hwan KIM

IPC: H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

CPC classification number: H04N19/513 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus comprises obtaining inter prediction information of a current block and wraparound information from a bitstream, and generating a prediction block of the current block based on the inter prediction information and the wraparound information. The wraparound information may comprise a first flag specifying whether wraparound motion compensation is enabled for a current picture including the current block. Based on the first flag having a predetermined value specifying that the wraparound motion compensation is enabled for the current picture, the prediction block may be generated by performing the wraparound motion compensation, and the wraparound motion compensation may be performed based on either boundaries of a current subpicture including the current block or boundaries of a reference picture of the current block, based on whether the current subpicture is independently coded or not.

公开(公告)号：US20240357111A1

公开(公告)日：2024-10-24

申请号：US18573087

申请日：2022-07-06

Applicant: LG Electronics Inc.

Inventor： Jungah CHOI ,  Jie ZHAO ,  Moonmo KOO ,  Jaehyun LIM ,  Jangwon CHOI ,  Seung Hwan KIM

IPC: H04N19/122 ,  H04N19/176 ,  H04N19/196

CPC classification number: H04N19/122 ,  H04N19/176 ,  H04N19/196

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method comprises generating a residual block of a current block by performing inverse transform on the current block based on a predetermined non-separable primary transform matrix and reconstructing the current block based on the residual block. The non-separable primary transform matrix may be applied to all transform coefficients of the current block regardless of a size of the current block.

公开(公告)号：US20240098291A1

公开(公告)日：2024-03-21

申请号：US18371232

申请日：2023-09-21

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seung Hwan KIM

IPC: H04N19/46 ,  H04N19/169 ,  H04N19/174

CPC classification number: H04N19/46 ,  H04N19/174 ,  H04N19/188

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method includes obtaining, from a bitstream, network abstraction layer (NAL) unit type information of at least one NAL unit including coded image data, determining at least one NAL unit type of one or more slices in the current picture based on the obtained NAL unit type information, and decoding the current picture based on the determined NAL unit type. The current picture is determined to be a random access skipped leading (RASL) picture, based on the determined NAL unit type including a RASL picture NAL unit type (RASL_NUT). When an intra random access point (IRAP) picture associated with the RASL picture is a first picture in decoding order, the RASL picture is decoded, based on the RASL picture including one or more slices having a random access decodable leading (RADL) picture NAL unit type (RADL_NUT).

公开(公告)号：US20230353749A1

公开(公告)日：2023-11-02

申请号：US17782933

申请日：2020-12-04

Applicant: LG ELECTRONICS INC.

Inventor： Jung Hak NAM ,  Hendry HENDRY ,  Jaehyun LIM ,  Seung Hwan KIM

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/176

Abstract: An image encoding/decoding method and apparatus are provided. The image decoding method according to the present disclosure may comprise the steps of: deriving a temporal motion vector predictor for the current block on the basis of a co-located picture for the current block; deriving a motion vector of the current block on the basis of the temporal motion vector predictor; and generating a prediction block of the current block on the basis of the motion vector, wherein the co-located picture is determined on the basis of identification information of the co-located picture, which is included in a slice header of the current slice including the current block, and when the slice header does not include identification information of the co-located picture, the co-located picture is determined on the basis of identification information of the co-located picture, which is included in a picture header of the current picture including the current block.

公开(公告)号：US20230328268A1

公开(公告)日：2023-10-12

申请号：US18209926

申请日：2023-06-14

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Seung Hwan KIM ,  Jie ZHAO

IPC: H04N19/503 ,  H04N19/176 ,  H04N19/169 ,  H04N19/70

CPC classification number: H04N19/503 ,  H04N19/176 ,  H04N19/188 ,  H04N19/70

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may comprise parsing weight information specifying a weight for a reference sample from a bitstream according to a weight parameter syntax structure, and decoding a current block by performing inter prediction based on the weight information. The parsing according to the weight parameter syntax structure may comprise obtaining weight number information specifying the number of weight information obtained from the bitstream according to the weight parameter syntax structure and obtaining weight information from the weight parameter syntax structure based on the weight number information.