Patents by Inventor Bae-keun Lee

Bae-keun Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and device for processing video signal
    Patent number: 11743455
    Abstract: A method for decoding a video according to the present invention, may comprise determining whether bi-directional intra prediction is applied to a current block, deriving a reference sample of the current block, and when the bi-directional intra prediction is applied to the current block, based on a first reference sample and a second reference sample specified by an intra prediction mode of the current block, obtaining a prediction sample of the current block.
    Type: Grant
    Filed: June 9, 2022
    Date of Patent: August 29, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • Method and device for video signal processing
    Patent number: 11743483
    Abstract: An image decoding method according to the present invention may comprise obtaining a motion vector of a current block, updating the motion vector when bi-directional optical flow is applied to the current block, performing motion compensation on the current block by using the updated motion vector.
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: August 29, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL
    Publication number: 20230269369
    Abstract: An image decoding method according to the present invention may comprise the steps of: deriving a merge candidate from a candidate block; generating a first merge candidate list including the merge candidate; specifying any one of a plurality of merge candidates included in the first merge candidate list; deriving affine vectors of a current block on the basis of motion information of the specified merge candidate; deriving a motion vector of a sub-block in the current block on the basis of the affine vectors; and performing motion compensation on the sub-block on the basis of the motion vector.
    Type: Application
    Filed: April 25, 2023
    Publication date: August 24, 2023
    Applicant: KT CORPORATION
    Inventor: Bae Keun LEE
  • IMAGE SIGNAL ENCODING/DECODING METHOD AND DEVICE THEREFOR
    Publication number: 20230269381
    Abstract: An image decoding method, according to the present disclosure, comprises the steps of: parsing tile column number information indicating a value wherein 1 is subtracted from the number of tile columns included in the i-th slice; parsing tile row number information indicating a value wherein 1 is subtracted from the number of tile rows included in the i-th slice; and, if the tile column number information and the tile row number information are both 0, further parsing number information related to the number of slices in which height information in a tile including the i-th slice is clearly signaled.
    Type: Application
    Filed: April 18, 2023
    Publication date: August 24, 2023
    Inventors: Bae Keun LEE, Dong San JUN
  • Method and apparatus for processing video signal
    Patent number: 11736686
    Abstract: A method for decoding a video according to the present invention may comprise: determining a first prediction mode for a first sub-block in a current block and a second intra prediction mode for a second sub-block, performing a first prediction for the first sub-block based on the first intra prediction mode, performing a second prediction for the second sub-block based on the second intra prediction mode, and obtaining a prediction sample of the current block according to a result of the first prediction and the second prediction.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: August 22, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • METHOD FOR ENCODING/DECODING VIDEO SIGNAL AND DEVICE THEREFOR
    Publication number: 20230262253
    Abstract: A video decoding method, according to the present invention, comprises the steps of: deriving an L0 motion vector and an L1 motion vector of a current block; deriving an L0 prediction sample and an L1 prediction sample for a first position inside the current block on the basis of the L0 motion vector and the L1 motion vector; determining whether to apply a bidirectional optical flow to the current block; deriving a refined motion vector for a subblock which comprises the first position, when it is determined to apply the bidirectional optical flow; deriving a refined prediction sample for the first position on the basis of the refined motion vector; and obtaining a prediction sample for the first position by using the L0 prediction sample, the L1 prediction sample, and the refined prediction sample.
    Type: Application
    Filed: April 4, 2023
    Publication date: August 17, 2023
    Inventor: Bae Keun LEE
  • Method for encoding/decoding video signal and apparatus therefor
    Patent number: 11729376
    Abstract: A video decoding method according to the present disclosure includes determining a reference sample line for a current block, deriving an intra prediction mode for the current block, and performing intra prediction of the current block based on the reference sample line and the intra prediction mode.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: August 15, 2023
    Assignee: Apple Inc.
    Inventor: Bae Keun Lee
  • Method for encoding/decoding image signal and apparatus therefor
    Patent number: 11722665
    Abstract: An image signal decoding method according to an embodiment of the present disclosure comprises the steps of: splitting a current picture into a plurality of tiles; decoding split information indicating a slice type, wherein the split information indicates whether a rectangular slice is to be applied; and when the split information indicates that the rectangular slice is to be applied, determining a slice on the basis of information indicating the size of a slice.
    Type: Grant
    Filed: October 18, 2021
    Date of Patent: August 8, 2023
    Assignee: XRIS CORPORATION
    Inventor: Bae Keun Lee
  • Method and apparatus for processing video signal
    Patent number: 11716467
    Abstract: A method for decoding a video according to the present invention may comprise: determining a first prediction mode for a first sub-block in a current block and a second intra prediction mode for a second sub-block, performing a first prediction for the first sub-block based on the first intra prediction mode, performing a second prediction for the second sub-block based on the second intra prediction mode, and obtaining a prediction sample of the current block according to a result of the first prediction and the second prediction.
    Type: Grant
    Filed: October 28, 2021
    Date of Patent: August 1, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • Image signal encoding/decoding method and device for same
    Patent number: 11716471
    Abstract: An image decoding method according to the present invention may include splitting a picture into a plurality of tiles; and determining at least one slice on the basis of the plurality of tiles. Here, splitting a picture into a plurality of tiles may include: determining the width of a first tile column in the picture; and determining the width of a second tile column neighboring the first tile column.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: August 1, 2023
    Assignee: Apple Inc.
    Inventor: Bae Keun Lee
  • Video signal processing method and device
    Patent number: 11711520
    Abstract: According to the present invention, there is provided a method of decoding an image, the method including: deriving an initial motion vector of a current block; determining a motion refinement vector of the current block; and determining a motion vector of the current block on the basis of the initial motion vector and the motion refinement vector. Herein, the initial motion vector is derived from any one of merge candidates included in a merge candidate list for the current block.
    Type: Grant
    Filed: September 8, 2021
    Date of Patent: July 25, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • Method for encoding/decoding image signal, and device therefor
    Patent number: 11711534
    Abstract: An image decoding method according to the present invention comprises the steps of: referring to a first flag for indicating whether intra block-based delta pulse code modulation (BDPCM) signaled through a sequence parameter set is permitted, so as to determine whether a second flag for indicating whether the intra BDPCM is applied to a current block is parsed; determining whether the intra BDPCM is applied to the current block on the basis of the second flag; determining an intra BDPCM mode of the current block when it is determined that the intra BDPCM is applied to the current block; and acquiring a residual sample of the current block on the basis of the intra BDPCM mode.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: July 25, 2023
    Assignee: Apple Inc.
    Inventor: Bae Keun Lee
  • Method and device for video signal processing
    Patent number: 11706446
    Abstract: An image decoding method according to the present invention may comprise determining an intra prediction mode of a current block, deriving reference samples of the current block, and obtaining a prediction sample of the current block using at least one of the reference samples.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: July 18, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • METHOD AND APPARATUS FOR PROCESSING VIDEO SIGNAL
    Publication number: 20230224473
    Abstract: The present invention is related to processing a video signal. A method for decoding a video according to the present invention may comprise checking a merge coding unit which is generated by merging a plurality of coding units neighboring each other based on an encoded syntax element, and decoding the checked merge coding unit, wherein a same motion vector is shared in the merge coding unit.
    Type: Application
    Filed: March 13, 2023
    Publication date: July 13, 2023
    Applicant: KT CORPORATION
    Inventor: Bae Keun LEE
  • Method and device for processing video signal
    Patent number: 11700366
    Abstract: A method of video decoding according to the present invention may comprise determining an intra prediction mode of a current block, determining a DC value based on at least one of top reference samples or left reference samples of the current block when the intra prediction mode of the current block is a DC mode, and deriving a prediction sample of the current block based on the DC value.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: July 11, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • Method and apparatus for processing video signal
    Patent number: 11700392
    Abstract: A method for decoding a video according to the present invention may comprise: determining an intra prediction mode of a current block, deriving reference samples from neighboring samples of the current block, obtaining a first prediction sample for the current block, based on the intra prediction mode and the reference samples, determining an offset for the first prediction sample, and obtaining a second prediction sample by applying the offset to the first prediction sample.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: July 11, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • Method and apparatus for processing video signal
    Patent number: 11700389
    Abstract: A method for decoding a video according to the present invention may comprise: decoding information indicating whether a non-zero transform coefficient exists in a current block, when the information indicates that the non-zero transform coefficient exists in the current block, determining a scanning order of the current block, and decoding a transform coefficient included in the current block according to the determined scanning order.
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: July 11, 2023
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • Image signal encoding/decoding method, and apparatus therefor
    Patent number: 11695952
    Abstract: An image decoding method according to the present invention comprises the steps of: deriving a merge candidate of a current block from a neighboring block of the current block; adding the derived merge candidate to a merge candidate list; when the number of merge candidates previously added to the merge candidate list is less than a threshold value, adding at least one prediction area merge candidate included in a prediction area motion information table to the merge candidate list; deriving motion information about the current block on the basis of the merge candidate list; and performing motion compensation on the current block on the basis of the derived motion information.
    Type: Grant
    Filed: December 30, 2021
    Date of Patent: July 4, 2023
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventor: Bae Keun Lee
  • VIDEO SIGNAL PROCESSING METHOD AND DEVICE
    Publication number: 20230209080
    Abstract: An image decoding method, according to the present invention, can comprise the steps of: deriving a spatial merge candidate of a current block; generating a merge candidate list for the current block on the basis of the spatial merge candidate; acquiring motion information on the current block on the basis of the merge candidate list; and performing motion compensation for the current block by using the motion information.
    Type: Application
    Filed: March 6, 2023
    Publication date: June 29, 2023
    Applicant: KT CORPORATION
    Inventor: Bae Keun LEE
  • METHOD FOR ENCODING/DECODING IMAGE SIGNAL AND DEVICE THEREFOR
    Publication number: 20230179790
    Abstract: An image decoding method according to the present invention may comprise the steps of: generating an affine mergence candidate list for a current block; specifying one of multiple affine mergence candidates contained in the affine mergence candidate list; deriving affine seed vectors of the specified mergence candidate; deriving a sub-block motion vector for a sub-block in the current block by using the affine seed vectors, wherein the sub-block is smaller in size than the current block; deriving offset data for the sub-block; and generating a sub-prediction block for the sub-block on the basis of the affine vector and the offset data.
    Type: Application
    Filed: September 30, 2022
    Publication date: June 8, 2023
    Inventor: Bae Keun Lee