Patents Assigned to Intellectual Discovery
  • Publication number: 20230421777
    Abstract: The present invention relates to an intra prediction scheme among video coding techniques and, more particularly, relates to a video decoding method and apparatus for diving a block into a plurality of sub-blocks when intra prediction is performed and sequentially performing infra prediction on each of the sub-blocks. The decoding method performed by a video decoding apparatus includes determining whether to perform sub-block-based intra prediction on a current coding unit, dividing the current coding unit into a plurality of sub-blocks, performing intra prediction on each of the sub-blocks when a result of determination of whether to perform sub-block-based intra prediction has a value of “true”, and directly performing block-based intra prediction on the current coding unit without dividing the current coding unit when the result of the determination has a value of “false”.
    Type: Application
    Filed: September 7, 2023
    Publication date: December 28, 2023
    Applicant: Intellectual Discovery Co., Ltd.
    Inventors: Yong Jo AHN, Ho Chan Ryu
  • Publication number: 20230362365
    Abstract: A device for encoding/decoding the image according to the present invention includes an intra prediction module configured to: determine an intra prediction mode of a current block; determine a scanning order of multiple sub blocks in the current block on the basis of the determined intra prediction mode; and perform intra prediction of the current block on the basis of the determined scanning order.
    Type: Application
    Filed: July 13, 2023
    Publication date: November 9, 2023
    Applicant: Intellectual Discovery Co., Ltd.
    Inventors: Dong Gyu SIM, Ho Chan Ryu, Yong Jo Ahn
  • Patent number: 11812031
    Abstract: The image encoding/decoding method and device according to the present invention can construct a merge candidate list of a current block, derive motion information of the current block on the basis of the merge candidate list and a merge index of the current block, derive a motion vector difference of the current block, correct a motion vector of the current block by means of the motion vector difference, and carry out motion compensation on the current block by means of the corrected motion vector.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: November 7, 2023
    Assignee: INTELLECTUAL DISCOVERY CO., LTD.
    Inventors: Bae Keun Lee, Dong San Jun
  • Patent number: 11812033
    Abstract: The present invention provides an image encoding method and an image decoding method. The image decoding method of the present invention may comprise: obtaining intra-frame prediction information of a current block from a bitstream; inducing an intra-frame prediction mode of the current block on the basis of the intra-frame prediction information; determining a reference region for intra-frame prediction of the current block; and performing intra-frame prediction of the current block on the basis of the intra-frame prediction mode and the reference region.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: November 7, 2023
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Yong Jo Ahn, Ho Chan Ryu
  • Publication number: 20230353773
    Abstract: A method of decoding a video signal according to the present invention may include: determining whether or not change in brightness is present between a current video including a current block and a reference video of the current video; when it is determined that change in brightness is present between the current video and the reference video, determining weight prediction parameter candidates of the current block; determining a weight prediction parameter of the current block on the basis of index information specifying any of the weight prediction parameter candidates; and performing prediction for the current block on the basis of the weight prediction parameter.
    Type: Application
    Filed: July 13, 2023
    Publication date: November 2, 2023
    Applicant: Intellectual Discovery Co., Ltd.
    Inventors: Joo Hee MOON, Sung Won LIM, Dong Jae WON
  • Publication number: 20230353757
    Abstract: A video encoding/decoding apparatus according to the present invention acquires motion vector refinement information, performs motion compensation on the basis of a motion vector of a current block, refines the motion vector of the current block using at least one or both of the motion vector refinement information and the output of the motion compensation, and performs motion compensation using the refined motion vector.
    Type: Application
    Filed: July 11, 2023
    Publication date: November 2, 2023
    Applicant: INTELLECTUAL DISCOVERY CO., LTD.
    Inventors: Yong Jo AHN, Dong Gyu SIM, Ho Chan RYU, Seanae PARK, Byung Tae OH, Byung Cheol SONG
  • Publication number: 20230345034
    Abstract: The present invention provides an image encoding method and an image decoding method. An image decoding method according to the present invention, for decoding an image by decoder-side motion information derivation, comprises the steps of: checking, from among a plurality of motion information derivation types, the motion information derivation type applied to the current block: and deriving motion information of the current block according to the checked motion information derivation type, wherein different motion information compensation techniques are applicable according to the motion information derivation type.
    Type: Application
    Filed: June 28, 2023
    Publication date: October 26, 2023
    Applicant: Intellectual Discovery Co., Ltd.
    Inventors: Yong Jo AHN, Ho Chan Ryu
  • Patent number: 11792393
    Abstract: An encoding/decoding method and device according to the present disclosure may: determine at least one among a plurality of inter prediction modes as the inter prediction mode of the current block; form an inter prediction candidate list on the basis of the determined inter prediction mode; perform motion compensation on the basis of one prediction candidate in the inter prediction candidate list, and generate a first prediction block of the current block; and correct the first prediction block by using a prescribed intra prediction mode.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: October 17, 2023
    Assignee: INTELLECTUAL DISCOVERY CO., LTD.
    Inventors: Jae Gon Kim, Do Hyeon Park, Yong Uk Yoon, Ji Hoon Do
  • Patent number: 11785244
    Abstract: A method of decoding a video signal according to the present invention may include: determining whether or not change in brightness is present between a current video including a current block and a reference video of the current video; when it is determined that change in brightness is present between the current video and the reference video, determining weight prediction parameter candidates of the current block; determining a weight prediction parameter of the current block on the basis of index information specifying any of the weight prediction parameter candidates; and performing prediction for the current block on the basis of the weight prediction parameter.
    Type: Grant
    Filed: March 2, 2022
    Date of Patent: October 10, 2023
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Joo Hee Moon, Sung Won Lim, Dong Jae Won
  • Patent number: 11785227
    Abstract: The present invention relates to an intra prediction scheme among video coding techniques and, more particularly, relates to a video decoding method and apparatus for diving a block into a plurality of sub-blocks when intra prediction is performed and sequentially performing infra prediction on each of the sub-blocks. The decoding method performed by a video decoding apparatus includes determining whether to perform sub-block-based intra prediction on a current coding unit, dividing the current coding unit into a plurality of sub-blocks, performing intra prediction on each of the sub-blocks when a result of determination of whether to perform sub-block-based intra prediction has a value of “true”, and directly performing block-based intra prediction on the current coding unit without dividing the current coding unit when the result of the determination has a value of “false”.
    Type: Grant
    Filed: January 7, 2022
    Date of Patent: October 10, 2023
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Yong Jo Ahn, Ho Chan Ryu
  • Patent number: 11770539
    Abstract: A video encoding/decoding apparatus according to the present invention acquires motion vector refinement information, performs motion compensation on the basis of a motion vector of a current block, refines the motion vector of the current block using at least one or both of the motion vector refinement information and the output of the motion compensation, and performs motion compensation using the refined motion vector.
    Type: Grant
    Filed: June 9, 2022
    Date of Patent: September 26, 2023
    Assignee: INTELLECTUAL DISCOVERY CO., LTD.
    Inventors: Yong Jo Ahn, Dong Gyu Sim, Ho Chan Ryu, Seanae Park, Byung Tae Oh, Byung Cheol Song
  • Patent number: 11758159
    Abstract: An image encoding/decoding method and device according to the present disclosure may configure a reference sample for a cross component prediction of a chroma component block, derive a cross component prediction parameter by using the reference sample, and make a cross component prediction of the chroma component block on the basis of the cross component prediction parameter and a luma component block corresponding to the chroma component block.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: September 12, 2023
    Assignee: INTELLECTUAL DISCOVERY CO., LTD.
    Inventor: Yong Jo Ahn
  • Publication number: 20230283795
    Abstract: A video coding method and device, according to the present invention, determine whether motion compensation is performed by sub-block unit, determine a search area for motion compensation of a current block, calculate a plurality of SAD candidates with respect to the search area, derive delta motion information of the current block on the basis of the plurality of SAD candidates, and can compensate for motion information of the current block by using pre-generated motion information and the delta motion information of the current block.
    Type: Application
    Filed: May 12, 2023
    Publication date: September 7, 2023
    Applicant: INTELLECTUAL DISCOVERY CO., LTD.
    Inventor: Yong Jo Ahn
  • Publication number: 20230283784
    Abstract: In an image encoding/decoding method and device according to the present invention, a candidate list for motion information prediction of a current block is generated, a control point vector of the current block is derived on the basis of the candidate list and a candidate index, a motion vector of the current block is derived on the basis of the control point vector of the current block, and inter-prediction with respect to the current block can be performed by means of the motion vector.
    Type: Application
    Filed: January 18, 2023
    Publication date: September 7, 2023
    Applicant: INTELLECTUAL DISCOVERY CO., LTD.
    Inventor: Yong Jo AHN
  • Publication number: 20230262258
    Abstract: The present invention relates to block merging according to block split among video coding techniques, and a method and an apparatus for coding and decoding a video, in which in generating and modifying a block merging list, spatial merging candidate blocks of the block merging list are changed according to a split type and order of a current coding unit.
    Type: Application
    Filed: April 20, 2023
    Publication date: August 17, 2023
    Applicant: INTELLECTUAL DISCOVERY CO., LTD.
    Inventors: Yong Jo Ahn, Ho Chan Ryu
  • Patent number: 11729410
    Abstract: The present invention provides an image encoding method and an image decoding method. An image decoding method according to the present invention, for decoding an image by decoder-side motion information derivation, comprises the steps of: checking, from among a plurality of motion information derivation types, the motion information derivation type applied to the current block: and deriving motion information of the current block according to the checked motion information derivation type, wherein different motion information compensation techniques are applicable according to the motion information derivation type.
    Type: Grant
    Filed: May 4, 2022
    Date of Patent: August 15, 2023
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Yong Jo Ahn, Ho Chan Ryu
  • Publication number: 20230254513
    Abstract: The present invention relates to a block partitioning structure from among the video coding schemes, and a method and apparatus for encoding and decoding the block partitioning structure. The video encoding and decoding method comprises the steps of: combining two or more encoding units of maximum size into a single encoding unit group; acquiring encoding data corresponding to the combined single encoding unit group; and decoding, according to a decoding order, the two or more encoding units of maximum size contained in the single encoding unit group.
    Type: Application
    Filed: April 18, 2023
    Publication date: August 10, 2023
    Applicant: Intellectual discovery Co., Ltd.
    Inventors: Ho Chan RYU, Yong Jo AHN
  • Patent number: 11677970
    Abstract: A video coding method and device, according to the present invention, determine whether motion compensation is performed by sub-block unit, determine a search area for motion compensation of a current block, calculate a plurality of SAD candidates with respect to the search area, derive delta motion information of the current block on the basis of the plurality of SAD candidates, and can compensate for motion information of the current block by using pre-generated motion information and the delta motion information of the current block.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: June 13, 2023
    Assignee: INTELLECTUAL DISCOVERY CO., LTD.
    Inventor: Yong Jo Ahn
  • Publication number: 20230179796
    Abstract: The present invention relates to an image encoding/decoding method and apparatus. The image decoding method according to the present invention may comprise configuring an MPM list based on intra-prediction modes of neighbor blocks of a current block and a number of frequencies of the intra-prediction modes of the neighbor blocks, deriving an intra-prediction mode of the current block based on the MPM list, and performing intra-prediction for the current block based on the intra-prediction mode.
    Type: Application
    Filed: December 12, 2022
    Publication date: June 8, 2023
    Applicant: Intellectual Discovery Co., Ltd.
    Inventors: Hyun Suk KO, Sung Chang LIM, Jung Won KANG, Jin Ho LEE, Ha Hyun LEE, Dong San JUN, Hui Yong KIM
  • Patent number: 11671619
    Abstract: In a video encoding/decoding method and device according to the present invention, a merge candidate of a current block may be determined, a merge candidate list may be configured on the basis of the merge candidate, motion information of the current block may be derived from the merge candidate list, and the motion information may be used to perform inter prediction of the current block.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: June 6, 2023
    Assignee: INTELLECTUAL DISCOVERY CO., LTD.
    Inventor: Yong Jo Ahn