Patents by Inventor Jung-Won Kang

Jung-Won Kang 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).

  • Image encoding/decoding method and apparatus, and recording medium storing bitstream
    Patent number: 11671603
    Abstract: Disclosed herein is a method of decoding an image. The method includes determining a prediction mode of a current block as a merge mode with motion vector difference (MMVD), deriving a merge candidate list of the current block, deriving a motion vector predictor of the current block using the merge candidate list, deriving a motion vector difference of the current block, and deriving a motion vector of the current block using the motion vector predictor and the motion vector difference. Only some of candidates in the merge candidate list are used to derive the motion vector predictor.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: June 6, 2023
    Assignees: Electronics Telecommunications Research Institute, HANBAT NATIONAL UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Ha Hyun Lee, Jung Won Kang, Sung Chang Lim, Jin Ho Lee, Hui Yong Kim, Hae Chul Choi, Dae Hyeok Gwon, Jae Ryun Choi
  • IMAGE CONVERSION APPARATUS AND METHOD
    Publication number: 20230171390
    Abstract: Disclosed herein are an image compression apparatus and method. The image conversion method includes generating a multi-plane image reconfigured into layers in a depth direction based on multiple pieces of multi-view image data, generating an aggregated layer by aggregating the layers of the multi-plane image into at least one layer, and converting a multi-plane image including the aggregated layer into a two-dimensional (2D) atlas image.
    Type: Application
    Filed: November 6, 2022
    Publication date: June 1, 2023
    Inventors: Seong-Jun BAE, Jung-Won KANG, Soo-Woong KIM, Gun BANG, Jin-Ho LEE, Ha-Hyun LEE, Sung-Chang LIM
  • APPARATUS AND METHOD FOR COMPRESSING THREE-DIMENSIONAL VOLUME DATA
    Publication number: 20230169692
    Abstract: Disclosed herein are an apparatus and method for compressing 3D volume data. The apparatus for compressing three-dimensional (3D) volume data includes one or more processor, and execution memory configured to store at least one program that is executed by the one or more processors, wherein the at least one program is configured to receive 3D volume data for data compression, select necessary voxels that contribute to formation of a geometric surface from the 3D volume data using a marching cubes algorithm, represent location information of the selected necessary voxels by a tree structure, and binarize the location information of the necessary voxels by serializing the tree structure, and quantize truncated signed distance values to surfaces adjacent to the necessary voxels constituting a volume from the 3D volume data using the binarized location information of the necessary voxels.
    Type: Application
    Filed: November 4, 2022
    Publication date: June 1, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Soo-Woong KIM, Jung-Won KANG, Gun BANG, Seong-Jun BAE, Jin-Ho LEE, Ha-Hyun LEE, Sung-Chang LIM
  • IMAGE ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM IN WHICH BITSTREAM IS STORED
    Publication number: 20230138960
    Abstract: The present invention is about an image encoding/decoding method and apparatus. According to present invention, a method of decoding an image, the method comprising, deriving an initial motion vector of a current block; deriving a refined motion vector by using the initial motion vector; and generating a prediction block of the current block by using the refined motion vector.
    Type: Application
    Filed: December 30, 2022
    Publication date: May 4, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Ha Hyun LEE, Sung Chang LIM, Jung Won KANG, Jin Ho LEE, Hui Yong KIM
  • IMAGE ENCODING/DECODING METHOD AND APPARATUS, AND RECORDING MEDIUM STORING BITSTREAM
    Publication number: 20230132843
    Abstract: An image decoding method is disclosed in the present specification. A method of decoding an image, the method may comprises determining whether to perform a context update for a first syntax element of a current block, updating, on the basis of the determination, a context for entropy decoding of the first syntax element and generating, on the basis of the updated context, a bin for the first syntax element, and wherein whether to perform the context update is determined on the basis of the number of pre-decoded predetermined syntax elements for the current block.
    Type: Application
    Filed: December 22, 2022
    Publication date: May 4, 2023
    Applicants: Electronics and Telecommunications Research Institute, CHIPS&MEDIA, INC
    Inventors: Sung Chang LIM, Jung Won KANG, Ha Hyun LEE, Jin Ho LEE, Hui Yong KIM, Dae Yeon KIM, Wook Je JEONG, Hyun Gyu KIM
  • INTRA PREDICTION MODE ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM IN WHICH BITSTREAM IS STORED
    Publication number: 20230129266
    Abstract: There is provided a method and apparatus of encoding/decoding an intra prediction mode. The method comprises deriving an intra prediction mode with respect to a current block, constructing a reference sample for the current block on the basis of the derived intra prediction mode, and performing the intra prediction with respect to the current block using the derived intra prediction mode and the constructed reference sample, wherein the intra prediction mode is derived on the basis of a most probable mode (MPM).
    Type: Application
    Filed: December 22, 2022
    Publication date: April 27, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang LIM, Jung Won KANG, Ha Hyun LEE, Jin Ho LEE, Hui Yong KIM
  • METHOD AND DEVICE FOR IMAGE ENCODING/DECODING ON BASIS OF ASYMMETRIC SUB-BLOCK
    Publication number: 20230106821
    Abstract: The present invention relates to a video encoding/decoding method and apparatus. The video decoding method according to the present invention may comprise dividing a coding unit into a plurality of sub-units according to a block division structure and performing decoding based on the sub-unit, wherein the block division structure is a block division structure in which division is performed so as to include at least one sub-unit having a predetermined block form other than square and rectangle forms.
    Type: Application
    Filed: December 13, 2022
    Publication date: April 6, 2023
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dong San JUN, Ha Hyun LEE, Jung Won KANG, Hyun Suk KO, Sung Chang LIM, Jin Ho LEE, Hui Yong KIM
  • Image encoding/decoding method, device, and recording medium having bitstream stored therein
    Patent number: 11616946
    Abstract: An image decoding method is disclosed in the present specification. An image decoding method according to the present invention may comprise deriving a candidate list for inter-prediction of a current block, deriving motion information of the current block by using the candidate list, deriving a cumulative coding information candidate by using the motion information of the current block, inserting the derived cumulative coding information candidate into a cumulative coding information candidate list and updating the candidate list by using the cumulative coding information candidate list, wherein the updated candidate list is used for inter-prediction of a block to be decoded after the current block.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: March 28, 2023
    Assignees: Electronics and Telecommunications Research Institute, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jung Won Kang, Ha Hyun Lee, Sung Chang Lim, Jin Ho Lee, Hui Yong Kim, Gwang Hoon Park, Tae Hyun Kim, Dae Young Lee
  • Video encoding/decoding method and device, and recording medium storing bit stream
    Patent number: 11616976
    Abstract: Disclosed is an image encoding method. The method includes deriving a motion refinement candidate from among motion information of spatial neighboring blocks, motion information of a temporal neighboring blocks, predefined motion information, and motion information that most frequently occurs in a reference picture, performing a motion information refinement on the derived motion refinement candidate, and generating a prediction block of a current block by using the motion refinement candidate having undergone the motion information refinement.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: March 28, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang Lim, Jung Won Kang, Hyun Suk Ko, Dong San Jun, Jin Ho Lee, Ha Hyun Lee, Hui Yong Kim
  • VIDEO ENCODING/DECODING METHOD AND APPARATUS, AND RECORDING MEDIUM IN WHICH BIT STREAM IS STORED
    Publication number: 20230088384
    Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus according to the present invention may comprise deriving an intra-prediction mode of a current block, and performing intra-prediction for the current block based on the intra-prediction mode. The deriving of the intra-prediction mode may comprise decoding a predetermined mode sameness indicator.
    Type: Application
    Filed: November 17, 2022
    Publication date: March 23, 2023
    Applicants: Electronics and Telecommunications Research Institute, Industry-University Cooperation Foundation Korea Aerospace University, Hanbat National University Industry-Academic Cooperation Foundation
    Inventors: Jin Ho LEE, Sung Chang LIM, Jung Won KANG, Hyun Suk KO, Ha Hyun LEE, Dong San JUN, Seung Hyun CHO, Hui Yong KIM, Jae Gon KIM, Do Hyeon PARK, Jin Soo CHOI, Hae Chul CHOI
  • IMAGE ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM STORING BITSTREAM
    Publication number: 20230087466
    Abstract: An image decoding method is disclosed in the present specification. An image decoding method according to the present invention may include: determining a position of a co-located block of a current block within a co-located picture (co-located picture); determining a representative motion vector of the current block by using motion information at the position of the co-located block; and deriving motion information on a sub-block included in the current block by using the representative motion vector.
    Type: Application
    Filed: November 25, 2022
    Publication date: March 23, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Ha Hyun LEE, Jung Won KANG, Sung Chang LIM, Jin Ho LEE, Hui Yong KIM
  • TRANSFORM INFORMATION ENCODING/DECODING METHOD AND DEVICE, AND BITSTREAM STORAGE MEDIUM
    Publication number: 20230082092
    Abstract: Disclosed herein are a method, an apparatus and a storage medium for transform information encoding/decoding. A transform includes a primary transform and a secondary transform. A primary transform method and a secondary transform method are selected from among multiple different methods. A transform is performed on a target block based on a selected primary transform method and a selected secondary transform method. A primary transform method and a secondary transform method applied to the target block may be signaled using transform information such as a primary transform method index and a secondary transform method index.
    Type: Application
    Filed: October 12, 2020
    Publication date: March 16, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jung-Won KANG, Sung-Chang LIM, Jin-Ho LEE, Ha-Hyun LEE
  • METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE, AND RECORDING MEDIUM FOR STORING BITSTREAM
    Publication number: 20230071970
    Abstract: An image encoding method and an image decoding method are provided. The image decoding method includes deriving a temporal merge candidate from a co-located block of a current block, generating a merge candidate list of the current block based on the derived temporal merge candidate, and generating a prediction block of the current block based on the generated merge candidate list. The deriving a temporal merge candidate includes scaling a motion vector derived from the co-located block based on a POC difference value between the current block and a reference picture of the current block and a POC difference value between the co-located block and a reference picture of the co-located block, and modifying the scaled motion vector based on motion vector scaling information between a neighboring block of the current block and a co-located block of the neighboring block.
    Type: Application
    Filed: September 9, 2022
    Publication date: March 9, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Dong San JUN, Ha Hyun LEE, Jung Won KANG, Hyun Suk KO, Sung Chang LIM, Jin Ho LEE, Seung Hyun CHO, Hui Yong KIM, Jin Soo CHOI
  • IMAGE ENCODING/DECODING METHOD AND RECORDING MEDIUM THEREFOR
    Publication number: 20230058060
    Abstract: The present invention relates to a method for encoding/decoding a video. To this end, the method for decoding a video may include: generating a merge candidate list of a current block including at least one merge candidate corresponding to each of a plurality of reference picture lists; determining at least one piece of motion information by using the merge candidate list; and generating a prediction block of the current block by using the determined at least one piece of motion information.
    Type: Application
    Filed: October 26, 2022
    Publication date: February 23, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang LIM, Jung Won KANG, Hyun Suk KO, Ha Hyun LEE, Dong San JUN, Jin Ho LEE, Seung Hyun CHO, Hui Yong KIM, Jin Soo CHOI
  • IMAGE ENCODING/DECODING METHOD AND APPARATUS, AND RECORDING MEDIUM FOR STORING BITSTREAM
    Publication number: 20230049685
    Abstract: An image encoding/decoding method may comprise deriving at least one merge candidate of a current block, generating an initial merge candidate list of the current block by using the derived at least one merge candidate and generating a reconfigured merge candidate list by using the initial merge candidate list.
    Type: Application
    Filed: October 6, 2022
    Publication date: February 16, 2023
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dong San JUN, Jung Won KANG, Hyun Suk KO, Sung Chang LIM, Jin Ho LEE, Ha Hyun LEE, Hui Yong KIM
  • METHOD AND DEVICE FOR ENCODING/DECODING IMAGE BY USING GEOMETRICALLY CHANGED IMAGE
    Publication number: 20230042486
    Abstract: A method and apparatus use a geometric modified image for video encoding/decoding. The encoding method may include: generating a geometric modified reference picture by geometrically modifying a reference picture; generating a prediction block of a current block within an encoding target picture by performing inter prediction by referencing the reference picture or the geometrically modified reference picture; and encoding inter-prediction information of the current block.
    Type: Application
    Filed: October 25, 2022
    Publication date: February 9, 2023
    Applicants: Electronics and Telecommunications Research Institute, University-Industry Cooperation Group of Kyung Hee University
    Inventors: Jung Won KANG, Hyun Suk KO, Sung Chang LIM, Jin Ho LEE, Dong San JUN, Hui Yong KIM, Gwang Hoon PARK, Jin Soo CHOI, Tae Hyun KIM, Dae Young LEE, Young Su HEO
  • IMAGE ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM IN WHICH BITSTREAM IS STORED
    Publication number: 20230041717
    Abstract: The present invention is about an image encoding/decoding method and apparatus. According to present invention, a method of decoding an image, the method comprising, loading information of a neighboring block of a current block; decoding a current block using the loaded information of the neighboring block; and saving information of the current block that is decoded.
    Type: Application
    Filed: October 25, 2022
    Publication date: February 9, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang LIM, Jung Won KANG, Ha Hyun LEE, Jin Ho LEE, Hui Yong KIM
  • Image encoding/decoding method and device, and recording medium in which bitstream is stored
    Patent number: 11575925
    Abstract: The present invention is about an image encoding/decoding method and apparatus. According to present invention, a method of decoding an image, the method comprising, deriving an initial motion vector of a current block; deriving a refined motion vector by using the initial motion vector; and generating a prediction block of the current block by using the refined motion vector.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: February 7, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ha Hyun Lee, Sung Chang Lim, Jung Won Kang, Jin Ho Lee, Hui Yong Kim
  • Image encoding/decoding method and apparatus and recording medium for storing bitstream
    Patent number: 11575885
    Abstract: The present invention relates to an image encoding method and an image decoding method. The image decoding method includes partitioning a picture into a plurality of coding units, constructing a coding unit group including at least one coding unit of the plurality of coding units, obtaining coding information in units of one coding unit group, and decoding at least one coding unit of the plurality of coding units included in the coding unit group by using the obtained coding information.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 7, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jung Won Kang, Sung Chang Lim, Hyun Suk Ko, Ha Hyun Lee, Jin Ho Lee, Dong San Jun, Seung Hyun Cho, Hui Yong Kim, Jin Soo Choi
  • DECODING METHOD AND DEVICE FOR BIT STREAM SUPPORTING PLURALITY OF LAYERS
    Publication number: 20230032927
    Abstract: The present invention relates to a decoding method for a bit stream that supports a plurality of layers. The decoding method may include receiving information on a set of video parameters that includes information on the plurality of layers, and parsing the set of video parameters to grasp information on the layers in the bit stream.
    Type: Application
    Filed: September 23, 2022
    Publication date: February 2, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jung Won Kang, Ha Hyun Lee, Jin Soo Choi, Jin Woong Kim