公开(公告)号：US20230188714A1

公开(公告)日：2023-06-15

申请号：US17925782

申请日：2021-06-09

Applicant: LG ELECTRONICS INC

Inventor： Hendry HENDRY ,  Seung Hwan KIM ,  Jung Hak NAM ,  Hyeong Moon JANG ,  Seethal PALURI

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/82 ,  H04N19/186

Abstract: An image encoding/decoding method and apparatus for signaling an identifier for an APS and a method of transmitting a bitstream are provided. The image decoding method according to the present disclosure may comprise obtaining adaptive parameter set (APS) parameter type information specifying an APS parameter type signaled by an APS, obtaining APS identifier information specifying the APS after obtaining the APS parameter type information, and reconstructing an image based on the APS identifier information.

公开(公告)号：US20220337836A1

公开(公告)日：2022-10-20

申请号：US17731031

申请日：2022-04-27

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/124 ,  H04N19/18 ,  H04N19/176 ,  H04N19/70 ,  H04N19/186 ,  H04N19/60 ,  H04N19/132

Abstract: Provided are an image encoding/decoding method and device. An image decoding method performed by an image decoding device according to the present disclosure includes the steps of: determining a quantization parameter of the current block on the basis of whether color space conversion is applied to a residual sample of the current block; determining a transform coefficient of the current block on the basis of the quantization parameter; determining the residual sample of the current block by using the transform coefficient; and resetting the value of the residual sample on the basis of whether the color space conversion is applied.

公开(公告)号：US20220272370A1

公开(公告)日：2022-08-25

申请号：US17686124

申请日：2022-03-03

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Jie ZHAO ,  Seung Hwan KIM

IPC: H04N19/46 ,  H04N19/14 ,  H04N19/132 ,  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：US20250047832A1

公开(公告)日：2025-02-06

申请号：US18923500

申请日：2024-10-22

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/102 ,  H04N19/169 ,  H04N19/70

Abstract: An image encoding/decoding method and apparatus for signaling decoded picture buffer (DPB) related information and profile tier level (PTL) related information and a method of transmitting a bitstream are provided. The image decoding method according to the present disclosure may comprise obtaining first information indicating the number of one or more decoded picture buffer (DPB) parameter syntax structures in a video parameter set (VPS), obtaining the one or more DPB parameter syntax structures from the VPS based on the first information, obtaining second information between one or more multi-layer output layer sets (OLSs) and the one or more DPB parameter syntax structures from the VPS based on the first information, selecting a DPB parameter syntax structure that applies to a current OLS based on the second information, and processing the current OLS based on the selected DPB parameter syntax structure.

公开(公告)号：US20240373034A1

公开(公告)日：2024-11-07

申请号：US18689337

申请日：2022-09-21

Applicant: LG Electronics Inc.

Inventor： Jung Hak NAM ,  Sunmi YOO ,  Jaehyun LIM ,  Seung Hwan KIM

IPC: H04N19/147 ,  H04N19/103 ,  H04N19/124 ,  H04N19/132 ,  H04N19/14 ,  H04N19/184

Abstract: An image encoding/decoding method, a bitstream transmission method, and a computer-readable recording medium for storing a bitstream are provided. An image encoding method according to the present disclosure is an image encoding method performed by an image encoding device, and may be an image encoding method comprising the steps of: obtaining information on the similarity between a current image and a reference image and information on the complexity of the current image; predicting bitrate information and distortion information of one or more candidate resolutions on the basis of the information on the similarity and the information on the complexity; and selecting a resolution to be applied to the current image among the candidate resolutions on the basis of the bitrate information and the distortion information.

公开(公告)号：US20240283929A1

公开(公告)日：2024-08-22

申请号：US18654364

申请日：2024-05-03

Applicant: LG Electronics Inc.

Inventor： Ling LI ,  Jung Hak NAM ,  Jaehyun LIM ,  Jin HEO ,  Seung Hwan KIM

IPC: H04N19/117 ,  H04N19/186 ,  H04N19/423 ,  H04N19/70 ,  H04N19/82

CPC classification number: H04N19/117 ,  H04N19/186 ,  H04N19/423 ,  H04N19/70 ,  H04N19/82

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include determining a chroma array type of a current image, determining an adaptive loop filter (ALF) indicator of a chroma component based on the chroma array type, and performing ALF filtering with respect to a reconstructed image based on a value of the ALF indicator. The value of the ALF indicator may be determined to be a predetermined value without being obtained from a bitstream, based on the chroma array type being a predetermined type, and the value of the ALF indicator may be obtained from the bitstream, based on the chroma array type being not the predetermined type.

公开(公告)号：US20230336765A1

公开(公告)日：2023-10-19

申请号：US18211930

申请日：2023-06-20

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：US20230276065A1

公开(公告)日：2023-08-31

申请号：US17916260

申请日：2021-03-31

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seung Hwan KIM ,  Seethal PALURI

IPC: H04N19/46 ,  H04N19/172 ,  H04N19/105 ,  H04N19/119 ,  H04N19/167 ,  H04N19/82

CPC classification number: H04N19/46 ,  H04N19/172 ,  H04N19/105 ,  H04N19/119 ,  H04N19/167 ,  H04N19/82

Abstract: Provided is an image encoding/decoding method and apparatus. The image decoding method comprises obtaining subpicture information from a bitstream, deriving one or more subpictures in a current picture based on the subpicture information, and decoding a current subpicture in the current picture based on the subpicture information. The subpicture information may comprise a first flag specifying whether each of the one or more subpictures is treated as a picture, and, based on the bitstream including at least one first layer referring to a current layer including the current picture, the first flag for the first subpicture included in a first layer and corresponding to the current subpicture, and the first flag for the current subpicture have the same value.

公开(公告)号：US20230156180A1

公开(公告)日：2023-05-18

申请号：US17916371

申请日：2021-03-26

Applicant: LG ELECTRONICS INC.

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

IPC: H04N19/102 ,  H04N19/70 ,  H04N19/169

CPC classification number: H04N19/102 ,  H04N19/70 ,  H04N19/1883

Abstract: An image encoding/decoding method and apparatus for signaling decoded picture buffer (DPB) related information and profile tier level (PTL) related information and a method of transmitting a bitstream are provided. The image decoding method according to the present disclosure may comprise obtaining first information indicating the number of one or more decoded picture buffer (DPB) parameter syntax structures in a video parameter set (VPS), obtaining the one or more DPB parameter syntax structures from the VPS based on the first information, obtaining second information between one or more multi-layer output layer sets (OLSs) and the one or more DPB parameter syntax structures from the VPS based on the first information, selecting a DPB parameter syntax structure that applies to a current OLS based on the second information, and processing the current OLS based on the selected DPB parameter syntax structure.

公开(公告)号：US20230143648A1

公开(公告)日：2023-05-11

申请号：US17916724

申请日：2021-04-05

Applicant: LG ELECTRONICS INC.

Inventor： Jung Hak NAM ,  Hendry HENDRY ,  Hyeong Moon JANG ,  Seung Hwan KIM

IPC: H04N19/159 ,  H04N19/176 ,  H04N19/174

CPC classification number: H04N19/159 ,  H04N19/176 ,  H04N19/174

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method may comprise determining whether an inter slice type is allowed for a current picture including a current block, determining whether an intra slice type is allowed for the current picture, based on the inter slice type being allowed for the current picture, and decoding the current block based on a slice type allowed for the current picture. Whether the inter slice type is allowed for the current picture may be determined based on a picture type of the current picture and whether a current layer including the current picture is able to use inter-layer prediction.