公开(公告)号：US20210021834A1

公开(公告)日：2021-01-21

申请号：US17060792

申请日：2020-10-01

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/91 ,  H04N19/172 ,  H04N19/52 ,  H04N19/184 ,  H04N19/46 ,  H04N19/167

Abstract: A picture decoding method performed by a decoding apparatus according to the present disclosure includes obtaining motion prediction information from bitstream, generating an affine MVP candidate list including affine MVP candidates for a current block, deriving CPMVPs for respective CPs of the current block based on one of the affine MVP candidates included in the affine MVP candidate list, deriving the CPMVDs for the CPs of the current block based on information on CPMVDs for each of the CPs included in the obtained motion prediction information, deriving CPMVs for the CPs of the current block based on the CPMVPs and the CPMVDs, deriving prediction samples for the current block based on the CPMVs, and generating reconstructed samples for the current block based on the derived prediction samples.

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：US20250008089A1

公开(公告)日：2025-01-02

申请号：US18824053

申请日：2024-09-04

Applicant: LG Electronics Inc.

Inventor： Seethal PALURI ,  Seunghwan KIM

IPC: H04N19/105 ,  H04N19/126 ,  H04N19/132 ,  H04N19/139 ,  H04N19/17 ,  H04N19/30 ,  H04N19/70

Abstract: According to the disclosure of the present document, scaling list data and scaling list-related information may be hierarchically signaled, thereby enabling a reduction in data volume to be signaled for video/image coding and an increase in coding efficiency.

公开(公告)号：US20240430418A1

公开(公告)日：2024-12-26

申请号：US18828702

申请日：2024-09-09

Applicant: LG ELECTRONICS INC.

Inventor： Seethal PALURI ,  Hendry HENDRY

IPC: H04N19/117 ,  G06V10/60 ,  H04N19/132 ,  H04N19/172 ,  H04N19/186 ,  H04N19/70 ,  H04N19/82

Abstract: According to embodiment(s) of the present document, computational overhead and complexity can be reduced by using a 0th-order exponential Golomb coding scheme (ue(v)) for procedures of parsing syntax elements/information about absolute values of luma/chroma ALF filter coefficients. In addition, coding using ue(v) can be efficiently performed by fixing the range of values of the information about the absolute values of the luma/chroma ALF filter coefficients.

公开(公告)号：US20240422339A1

公开(公告)日：2024-12-19

申请号：US18815575

申请日：2024-08-26

Applicant: LG ELECTRONICS INC.

Inventor： Jie ZHAO ,  Seethal PALURI ,  Seunghwan KIM

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

Abstract: According to the disclosure of the present documents, a quantization parameter used in a scaling process of a quantized escape value in a palette mode may be derived on the basis of minimum quantization parameter information relating to a transform skip mode. Accordingly, the amount of data required to be signaled for video/image coding can be reduced and escape coding in a palette mode can be effectively performed.

公开(公告)号：US20240414354A1

公开(公告)日：2024-12-12

申请号：US18697628

申请日：2022-09-30

Applicant: LG Electronics Inc.

Inventor： Seunghwan KIM ,  Jie ZHAO ,  Seethal PALURI

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/147 ,  H04N19/176 ,  H04N19/70

Abstract: According to one embodiment of the present disclosure, a method by which a decoding device decodes an image is provided. The method comprises the steps of: acquiring image information from a bit-stream; determining whether at least one from among a template-based inter mode derivation (TIMD) mode and decoder-side intra mode derivation (DIMD) mode is applied to the current block; generating a prediction sample of the current block on the basis of the at least one from among the TIMD mode and DIMD mode; and generating a reconstructed sample of the current block on the basis of the prediction sample of the current block, wherein the TIMD mode is derived from a template of the current block and the DIMD mode is derived on the basis of the gradient of adjacent reference samples of the current block.

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：US20240397113A1

公开(公告)日：2024-11-28

申请号：US18795627

申请日：2024-08-06

Applicant: LG Electronics Inc.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

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

Abstract: A decoding method performed by a decoding apparatus, according to embodiments of the present document, may comprise the steps of: acquiring, via a bitstream, image information including residual information; generating reconstructed samples of a current picture on the basis of the residual information; and generating modified reconstructed samples by performing an in-loop filtering procedure on the reconstructed samples of the current picture, wherein whether or not the in-loop filtering procedure is performed across virtual boundaries is determined. The virtual boundaries can bring, to the decoding apparatus, advantages from a hardware perspective.

公开(公告)号：US20240397111A1

公开(公告)日：2024-11-28

申请号：US18791903

申请日：2024-08-01

Applicant: LG ELECTRONICS INC.

Inventor： Hendry HENDRY ,  Seethal PALURI ,  Seunghwan KIM

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

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：US20240397048A1

公开(公告)日：2024-11-28

申请号：US18791990

申请日：2024-08-01

Applicant: LG Electronics Inc.

Inventor： Jie ZHAO ,  Seunghwan KIM ,  Seethal PALURI

IPC: H04N19/124 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70

Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining CU chroma QP offset-related information for a current chroma block on the basis of the size and tree type of the current chroma block; deriving a chroma QP for the current chroma block on the basis of the CU chroma QP offset-related information; deriving residual samples for the current chroma block on the basis of the chroma QP; and generating a reconstructed picture on the basis of the residual samples, wherein the CU chroma QP offset-related information includes a CU chroma QP offset flag and a CU chroma QP offset index for the current chroma block.