公开(公告)号：US20240195954A1

公开(公告)日：2024-06-13

申请号：US18584910

申请日：2024-02-22

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Geonjung KO ,  Dongcheol KIM ,  Juhyung SON ,  Jaehong JUNG ,  Jinsam KWAK

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/33 ,  H04N19/593

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/33 ,  H04N19/593 ,  H04N19/139

Abstract: A method for processing a video signal, of the present disclosure, comprising the steps of: parsing, from a bitstream, upper level merge with MVD (MMVD) activation information (sps_mmvd_enabled_flag) indicating whether the upper level MMVD including a current block is usable; parsing, from the bitstream, MMVD merge information (mmvd_merge_flag) indicating whether the MMVD is used in the current block, if the upper level MMVD activation information indicates the activation of the MMVD; parsing MMVD distance-related information (mmvd_distance_idx) and MMVD direction-related information (mmvd_direction_idx), if the MMVD merge information indicates that the MMVD is used in the current block; and obtaining MMVD information (mMvdLX) based on the MMVD distance-related information and the MMVD direction-related information, wherein the MMVD information is greater than or equal to −2{circumflex over ( )}17 and is less than or equal to 2{circumflex over ( )}17−1.

公开(公告)号：US20240048692A1

公开(公告)日：2024-02-08

申请号：US18491003

申请日：2023-10-20

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：US20230308676A1

公开(公告)日：2023-09-28

申请号：US18328246

申请日：2023-06-02

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Geonjung KO ,  Dongcheol KIM ,  Juhyung SON ,  Jaehong JUNG ,  Jinsam KWAK

IPC: H04N19/513 ,  H04N19/53 ,  H04N19/57

CPC classification number: H04N19/513 ,  H04N19/53 ,  H04N19/57

Abstract: A video signal decoding device comprising a processor, wherein the processor is configured to: obtain reference samples corresponding to a first side of a current block and reference samples corresponding to a second side of the current block, obtain a direct current (DC) value for prediction of the current block based on a reference sample set comprising at least some of the reference samples corresponding to the first side and the reference samples corresponding to the second side, and reconstruct the current block based on the DC value.

公开(公告)号：US20220360786A1

公开(公告)日：2022-11-10

申请号：US17870809

申请日：2022-07-21

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Dongcheol KIM ,  Geonjung KO ,  Jaehong JUNG ,  Juhyung SON ,  Jinsam KWAK

IPC: 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：US20220239948A1

公开(公告)日：2022-07-28

申请号：US17716956

申请日：2022-04-08

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

Inventor： Jaehong JUNG ,  Juhyung SON ,  Dongcheol KIM ,  Geonjung KO ,  Jinsam KWAK

IPC: 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 based on whether a prediction method of the coding unit is MIP (Matrix based Intra Prediction), 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 based on an inverse transform of the secondary transform when the secondary transform is applied to the transform block, obtain a residual sample for the transform block based on the one or more inverse transform coefficients.

公开(公告)号：US20210297662A1

公开(公告)日：2021-09-23

申请号：US17343258

申请日：2021-06-09

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

Inventor： Geonjung KO ,  Dongcheol KIM ,  Juhyung SON ,  Jaehong JUNG ,  Jinsam KWAK

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/174 ,  H04N19/96

Abstract: A video signal processing method comprises: determining a prediction mode of a current block; when the prediction mode of the current block is a Block Copy (BC) prediction mode referring to a current picture, decoding the current block, based on the BC prediction mode; and when the prediction mode of the current block is an inter prediction mode referring to at least one picture, decoding the current block, based on the inter prediction mode.

公开(公告)号：US20210044808A1

公开(公告)日：2021-02-11

申请号：US16964949

申请日：2019-01-25

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

Inventor： Dongcheol KIM ,  Geonjung KO ,  Jaehong JUNG ,  Juhyung SON ,  Jinsam KWAK

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/593

Abstract: Disclosed is a video signal processing method and device for encoding or decoding a video signal. More specifically, disclosed are a video signal processing method and a video signal processing device for performing the method, the method comprising: obtaining reference line information indicating a reference line for intra prediction of a current block among a plurality of reference lines comprising neighboring samples of the current block; determining, on the basis of the reference line information, an intra prediction mode for the current block among a plurality of intra prediction modes constituting an intra prediction mode set; and decoding the current block on the basis of a plurality of reference samples on the reference line according to the reference line information and the determined intra prediction mode.

公开(公告)号：US20250150605A1

公开(公告)日：2025-05-08

申请号：US18714406

申请日：2022-11-29

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Kyungyong KIM ,  Dongcheol KIM ,  Juhyung SON ,  Jinsam KWAK

IPC: H04N19/186 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

Abstract: A video signal processing method comprises the steps of: configuring a template including neighboring blocks of a current block; down-sampling luminance component samples of the neighboring blocks on the basis of a color format of a current picture including the current block; deriving a first linear model and a second linear model on the basis of the down-sampled luminance component samples; and on the basis of any one linear model from among the first linear model and the second linear model, predicting a chrominance component sample at a location corresponding to a location of a first sample from among the luminance component samples of the current block, wherein the any one linear model is determined by comparing a value of the first sample with a threshold value.

公开(公告)号：US20250039400A1

公开(公告)日：2025-01-30

申请号：US18692814

申请日：2022-09-19

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Kyungyong KIM ,  Dongcheol KIM ,  Juhyung SON ,  Jinsam KWAK

IPC: H04N19/14 ,  H04N19/105 ,  H04N19/176

Abstract: The video signal decoding device comprises a processor, wherein the processor acquires first motion information about the current sub block, acquires second motion information about a first neighboring block from among neighboring blocks of the current sub block, acquires third motion information about a second neighboring block from among the neighboring blocks, acquires a first prediction block based on the first motion information, acquires a second prediction block based on the second motion information, acquires a third prediction block based on the third motion information, and acquires a final prediction block for the current sub block.

公开(公告)号：US20250008142A1

公开(公告)日：2025-01-02

申请号：US18828776

申请日：2024-09-09

Applicant: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC.

Inventor： Jaehong JUNG ,  Juhyung SON ,  Dongcheol KIM ,  Geonjung KO ,  Jinsam KWAK

IPC: H04N19/46 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/96

Abstract: A method for processing a video signal, the method comprising: acquiring a transform skip active flag indicating whether a transform skip flag can exist in a transform unit syntax, the transform skip flag indicating whether a transform skip is applied to a transform block included in a current block; acquiring a palette active flag indicating whether a palette mode is applied; when the transform skip active flag indicates existence of the transform skip flag in the transform unit syntax or the palette active flag indicates application of the palette mode, acquiring information related to a minimum quantization parameter which is allowed in a transform skip mode; acquiring the minimum quantization parameter on the basis of the information related to the minimum quantization parameter; correcting a quantization parameter on the basis of the acquired minimum quantization parameter; and reconstructing the current block on the basis of the corrected quantization parameter.