公开(公告)号：US11438596B2

公开(公告)日：2022-09-06

申请号：US17282745

申请日：2019-10-14

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Dongcheol Kim ,  Geonjung Ko ,  Jaehong Jung ,  Juhyung Son ,  Jinsam Kwak

IPC: H04N19/00 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

Abstract: The video signal processing method comprises the steps of: downsampling luma components of reconstructed blocks adjacent to a current block; acquiring a maximum luma value from among the downsampled luma components based on a first index; acquiring a next-highest maximum luma value from among the downsampled luma components based on a second index; acquiring a maximum average luma value based on an average value of the maximum luma value and the next-highest maximum luma value; acquiring a next-lowest minimum luma value from among the downsampled luma components based on a third index; acquiring a minimum luma value from among the downsampled luma components based on a fourth index; and acquiring a minimum average luma value based on the next-lowest minimum luma value and the minimum luma value.

公开(公告)号：US12041271B2

公开(公告)日：2024-07-16

申请号：US17578381

申请日：2022-01-18

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Dongcheol Kim ,  Geonjung Ko ,  Jaehong Jung ,  Juhyung Son ,  Jinsam Kwak

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/186

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/186

Abstract: A video signal decoding device comprises a processor which: decodes a general constraint information (GCI) syntax included in a bitstream of a video signal; and decodes the bitstream on the basis of the result of decoding the GCI syntax, wherein the GCI syntax includes a GCI syntax element for configuring the value of an SPS syntax element indicating whether it is possible to use a palette mode included in a sequence parameter set (SPS) raw byte sequence payload (RBSP) syntax.

公开(公告)号：US11849106B2

公开(公告)日：2023-12-19

申请号：US17423853

申请日：2020-01-20

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Geonjung Ko ,  Dongcheol Kim ,  Juhyung Son ,  Jaehong Jung ,  Jinsam Kwak

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

Abstract: Disclosed is a video signal processing method and device that encodes or decodes a video signal. In particular, the video signal processing method may comprise the steps of: parsing a first syntax element indicating whether a merge mode is applied to a current block; when the merge mode is applied to the current block, determining whether to parse a second syntax element on the basis of a first predefined condition, wherein the second syntax element indicates whether a first mode or a second mode is applied to the current block; when the first mode and the second mode are not applied to the current block, determining whether to parse a third syntax element on the basis of a second predefined condition; and determining a mode applied to the current block on the basis of the second syntax element or the third syntax element.

公开(公告)号：US11470306B2

公开(公告)日：2022-10-11

申请号：US17223419

申请日：2021-04-06

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Dongcheol Kim ,  Geonjung Ko ,  Jaehong Jung ,  Juhyung Son ,  Jinsam Kwak

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

Abstract: A video signal processing method comprises the steps of: obtaining information, from a received bitstream, indicating whether an MPM is used in a current block; when at least one of the intra prediction mode of the left block of the current block or the intra prediction mode of the upper block of the current block is an angular mode, generating an MPM list using only the angular mode; determining the intra prediction mode on the basis of the MPM list; and predicting the current block on the basis of the determined intra prediction mode.

公开(公告)号：US11432013B2

公开(公告)日：2022-08-30

申请号：US17348260

申请日：2021-06-15

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Jaehong Jung ,  Juhyung Son ,  Dongcheol Kim ,  Geonjung Ko ,  Jinsam Kwak

IPC: H04N19/625 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61 ,  H04N19/70 ,  G06T9/00

Abstract: A video signal processing method may comprise the steps of: confirming a prediction mode applied to a current coding unit; confirming whether a plurality of preset conditions are satisfied on the basis of at least one of the prediction mode of the current coding unit and a size of the current coding unit; parsing a first syntax element indicating a transform kernel applied to a transform unit included in the current coding unit when the plurality of preset conditions are satisfied; determining a transform kernel applied to horizontal and vertical directions of the current transform unit on the basis of the first syntax element; and generating a residual signal of the current transform unit by performing an inverse transform on the current transform unit using the determined transform kernel.

公开(公告)号：US11330302B2

公开(公告)日：2022-05-10

申请号：US17088110

申请日：2020-11-03

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  HUMAX CO., LTD.

Inventor： Jaehong Jung ,  Juhyung Son ,  Dongcheol Kim ,  Geonjung Ko ,  Jinsam Kwak

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/61 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

Abstract: A video signal decoding apparatus comprising a processor, wherein the processor is configured to: parse a syntax element related to a secondary transform of a coding unit from a bitstream of a video signal when one or more preset conditions are satisfied; check whether or not the secondary transform is applied to a transform block included in the coding unit based on the parsed syntax element; obtain one or more inverse transform coefficients for a first sub-block by performing an inverse secondary transform based on one or more coefficients of the first sub-block which is one of one or more sub-blocks constituting the transform block when the secondary transform is applied to the transform block; and obtain a residual sample for the transform block by performing an inverse primary transform based on the one or more inverse transform coefficients.

公开(公告)号：US11317118B2

公开(公告)日：2022-04-26

申请号：US17185683

申请日：2021-02-25

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC. ,  HUMAX CO., LTD.

Inventor： Jaehong Jung ,  Juhyung Son ,  Dongcheol Kim ,  Geonjung Ko ,  Jinsam Kwak

IPC: H04N19/625 ,  H04N19/12 ,  H04N19/176 ,  H04N19/61

Abstract: Disclosed is a video signal processing method comprising the steps of: obtaining at least one transform block for a residual signal of a current block from a video signal bitstream; determining, on the basis of length information of a first side of the transform block, a horizontal transform kernel for horizontal transformation of the transform block, regardless of the length of a second side of the transform block, which is orthogonal to the first side; determining, on the basis of length information of the second side, a vertical transform kernel for vertical transformation of the transform block, regardless of the length of the first side; obtaining the residual signal of the current block by performing, on the transform block, inverse transformation using the horizontal transform kernel and the vertical transform kernel; and reconstructing the current block on the basis of the obtained residual signal.

公开(公告)号：US12058358B2

公开(公告)日：2024-08-06

申请号：US17512584

申请日：2021-10-27

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Geonjung Ko ,  Dongcheol Kim ,  Juhyung Son ,  Jaehong Jung ,  Jinsam Kwak

IPC: H04N19/46 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

CPC classification number: H04N19/46 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: The present disclosure relates to a method and apparatus for processing a video signal and, more specifically, comprises the steps of: parsing, from a bitstream, an adaptive motion vector resolution (AMVR) enabled flag (sps_amvr_enabled_flag) indicating whether or not adaptive motion vector differential resolution is used; parsing, from the bitstream, an affine enabled flag (sps_affine_enabled_flag) indicating whether or not affine motion compensation is usable; on the basis of the affine enabled flag, determining whether or not the affine motion compensation is usable; when the affine motion compensation is usable, determining, on the basis of the AMVR enabled flag, whether or not the adaptive motion vector differential resolution is used; and, when the adaptive motion vector differential resolution is used, parsing, from the bitstream, an affine AMVR enabled flag (sps_affine_amvr_enabled flag) indicating whether or not the adaptive motion vector differential resolution is usable for the affine motion compensation.

公开(公告)号：US11570478B2

公开(公告)日：2023-01-31

申请号：US17697811

申请日：2022-03-17

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Jaehong Jung ,  Juhyung Son ,  Dongcheol Kim ,  Geonjung Ko ,  Jinsam Kwak

IPC: H04N19/61 ,  H04N19/12 ,  H04N19/625 ,  H04N19/176

Abstract: A video signal processor is configured to: obtain at least one transform block for a residual signal of a current block from a video signal bitstream, wherein the transform block comprises a plurality of transform coefficients two-dimensionally arranged, determine, on the basis of length information of a first side of the transform block, a horizontal transform kernel for horizontal transformation of the transform block, regardless of a length of a second side of the transform block, which is orthogonal to the first side, determine, on the basis of length information of the second side, a vertical transform kernel for vertical transformation of the transform block, regardless of a length of the first side, obtain the residual signal of the current block by performing, on the transform block, inverse transformation using the horizontal transform kernel and the vertical transform kernel, and reconstruct the current block based on the residual signal.

公开(公告)号：US11570443B2

公开(公告)日：2023-01-31

申请号：US16964967

申请日：2019-01-25

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Geonjung Ko ,  Juhyung Son ,  Dongcheol Kim ,  Jinsam Kwak

IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

Abstract: A video signal processing method and apparatus for encoding or decoding a video signal is disclosed. More particularly, a video signal processing method and a video signal processing apparatus using the same are disclosed, wherein a method for processing a video signal comprises the steps of: obtaining a set of control point motion vectors for prediction of a current block; obtaining the motion vector of each sub-block of the current block using control point motion vectors of the set of control point motion vectors; obtaining a predictor of the each sub-block of the current block using the motion vectors of the each sub-block; obtaining a predictor of the current block by combining predictors of the each sub-block; and restoring the current block using the predictor of the current block.