Patents by Inventor Chang Lim

Chang Lim 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).

  • INTRA PREDICTION MODE ENCODING/DECODING METHOD AND APPARATUS
    Publication number: 20230336740
    Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.
    Type: Application
    Filed: May 15, 2023
    Publication date: October 19, 2023
    Inventors: Sung Chang LIM, Hui Yong Kim, Jin Ho Lee, Jin Soo Choi, Jin Woong Kim, Jae Gon Kim, Sang Yong Lee, Hae Chul CHOI
  • Method and device using inter prediction information
    Patent number: 11792424
    Abstract: Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In video encoding and decoding, inter-prediction information for a target block may be derived, and inter prediction for a target block may be performed using the derived inter-prediction information. Combined inter-prediction information may be performed by combining multiple pieces of inter-prediction information, and the combined inter-prediction information may be added as a candidate to a list used for inter prediction. One of candidates in the list may be selected for inter prediction for the target block, and inter prediction using the selected candidate may be performed.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: October 17, 2023
    Assignees: Electronics and Telecommunications Research Institute, INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITY
    Inventors: Jin-Ho Lee, Jung-Won Kang, Hyunsuk Ko, Sung-Chang Lim, Ha-Hyun Lee, Dong-San Jun, Hui-Yong Kim, Jae-Gon Kim, Do-Hyeon Park, Yong-Uk Yoon
  • METHOD AND DEVICE FOR INTRA-PREDICTION
    Publication number: 20230328280
    Abstract: The multi sample prediction method of the present invention comprises the steps of: determining a sample group consisting of a plurality of samples inside a decoding target block; determining a representative position corresponding to the sample group, inside the decoding target block; determining a representative prediction value for the sample group, on the basis of the determined representative position; and determining the determined representative prediction value as the final prediction value for each of the plurality of samples making up the sample group. The present invention enhances efficiency in encoding/decoding and reduces complexity thereof.
    Type: Application
    Filed: May 31, 2023
    Publication date: October 12, 2023
    Inventors: Jin Ho LEE, Hui Yong KIM, Sung Chang LIM, Jong Ho KIM, Ha Hyun LEE, Jin Soo CHOI, Jin Woong KIM
  • METHOD FOR PROCESSING IMAGE PROVIDING IMPROVED ARITHMETIC ENCODING, METHOD FOR DECODING AND ENCODING IMAGE USING SAME, AND APPARATUS FOR SAME
    Publication number: 20230328250
    Abstract: According to an embodiment of the present invention, there is provided an image decoding method including: obtaining an arithmetic-coded symbol stream from an image stream; identifying a symbol segment from the symbol stream according to symbol segment information signaled from an encoding apparatus; selecting an arithmetic decoding process corresponding to the symbol segment; and collectively processing one or more symbols among multiple symbols included in the symbol segment, in association with the selected arithmetic decoding process.
    Type: Application
    Filed: May 24, 2023
    Publication date: October 12, 2023
    Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, CHIPS&MEDIA, INC.
    Inventors: Dae Yeon KIM, Sung Chang LIM, Jung Won KANG, Ha Hyun LEE, Jin Ho LEE, Hui Yong KIM
  • METHOD AND APPARATUS FOR ENCODING/DECODING A VIDEO USING A MOTION COMPENSATION
    Publication number: 20230328258
    Abstract: The present invention relates to a method for encoding/decoding a video. To this end, the method for decoding a video may include: deriving a spatial merge candidate from at least one of spatial candidate blocks of a current block, deriving a temporal merge candidate from a co-located block of the current block, and generating a prediction block of the current block based on at least one of the derived spatial merge candidate and the derived temporal merge candidate, wherein a reference picture for the temporal merge candidate is selected based on a reference picture list of a current picture including the current block and a reference picture list of a co-located picture including the co-located block.
    Type: Application
    Filed: June 13, 2023
    Publication date: October 12, 2023
    Applicant: LX Semicon Co., Ltd.
    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 USING PREDICTION BLOCK AND APPARATUS FOR SAME
    Publication number: 20230319308
    Abstract: According to the present invention, an image encoding/decoding method comprises the steps of: performing an intra prediction on a current block so as to generate a prediction block; performing filtering on a filtering target pixel in the prediction block on the basis of the intra prediction mode of the current block so as to generate a final prediction block; and generating a reconstructed block on the basis of a reconstructed differential block corresponding to the current block and on the final prediction block. According to the present invention, image encoding/decoding efficiency can be improved.
    Type: Application
    Filed: June 7, 2023
    Publication date: October 5, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jin Ho LEE, Hui Yong KIM, Sung Chang LIM, Jin Soo CHOI, Jin Woong KIM
  • Method for encoding and decoding quantized matrix and apparatus using same
    Patent number: 11778189
    Abstract: The present invention relates to a method for encoding and decoding a quantized matrix and an apparatus using same, the method for encoding a quantized matrix according to the present invention comprising the steps of: determining a quantization matrix to be used for quantization and quantizing; determining the prediction method used for the quantization of the quantization matrix; and encoding quantization matrix information on the basis of the determined prediction method, wherein the prediction method can be either a prediction method between coefficients in the quantization matrix or a duplicate of the quantization matrix.
    Type: Grant
    Filed: December 30, 2021
    Date of Patent: October 3, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang Lim, Hui Yong Kim, Jin Ho Lee, Jin Soo Choi, Jin Woong Kim
  • METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE BY USING BOUNDARY PROCESSING, AND RECORDING MEDIUM FOR STORING BITSTREAM
    Publication number: 20230308647
    Abstract: There is provided a method and apparatus of encoding/decoding an image. The method comprises decoding information on block partitioning of a current block included in a current picture from a bitstream; determining a partitioning method of the current block on the basis of the information; and partitioning the current block by using the determined partitioning method, wherein the partitioning method is determined on the basis of whether or not the current block includes a predetermined boundary.
    Type: Application
    Filed: May 15, 2023
    Publication date: September 28, 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 APPARATUS FOR ENCODING/DECODING IMAGE, AND RECORDING MEDIUM FOR STORING BITSTREAM
    Publication number: 20230308644
    Abstract: An image decoding method is disclosed in the present specification. An image decoding method according to the present invention may comprise determining a prediction mode of a current block and performing prediction with respect to the current block on the basis of the determined prediction mode.
    Type: Application
    Filed: May 15, 2023
    Publication date: September 28, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jung Won KANG, Ha Hyun LEE, Sung Chang LIM, Jin Ho LEE, Hui Yong KIM
  • METHOD AND APPARATUS FOR ENCODING/DECODING INTRA PREDICTION MODE
    Publication number: 20230308634
    Abstract: Provided are method and apparatus methods and apparatuses for encoding an intra-prediction mode based on a secondary IPM. The present invention may comprises a first decision step of determining whether an intra-prediction mode of a current block is included in a first candidate mode set including M candidate modes (M is an integer equal to or greater than 1); a second decision step of determining whether the intra-prediction mode of the current block is included in a second candidate mode set including N candidate modes (N is an integer equal to or greater than 1) based on a first determination result representing a determination result of the first decision step; and an intra prediction mode encoding step of encoding the intra-prediction mode of the current block based on the first determination result or a second determination result representing a determination result of the second decision step.
    Type: Application
    Filed: April 5, 2023
    Publication date: September 28, 2023
    Applicant: LX SEMICON CO., LTD.
    Inventors: Dong San JUN, Jung Won KANG, Sung Chang LIM, Hyun Suk KO, Jin Ho LEE, Hui Yong KIM, Jin Soo CHOI
  • METHOD FOR ENCODING/DECODING BLOCK INFORMATION USING QUAD TREE, AND DEVICE FOR USING SAME
    Publication number: 20230308673
    Abstract: Disclosed decoding method of the intra prediction mode comprises the steps of: determining whether an intra prediction mode of a present prediction unit is the same as a first candidate intra prediction mode or as a second candidate intra prediction mode on the basis of 1-bit information; and determining, among said first candidate intra prediction mode and said second candidate intra prediction mode, which candidate intra prediction mode is the same as the intra prediction mode of said present prediction unit on the basis of additional 1-bit information, if the intra prediction mode of the present prediction unit is the same as at least either the first candidate intra prediction mode or the second candidate intra prediction mode, and decoding the intra prediction mode of the present prediction unit.
    Type: Application
    Filed: June 1, 2023
    Publication date: September 28, 2023
    Applicants: Electronics and Telecommunications Research Institute, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jong Ho KIM, Hui Yong KIM, Se Yoon JEONG, Sung Chang LIM, Ha Hyun LEE, Jin Ho LEE, Suk Hee CHO, Jin Soo CHOI, Jin Woong KIM, Chie Teuk AHN, Mun Churl KIM, Bum Shik LEE
  • Method and device for simplifying the encoding and decoding of ultra-high definition images
    Patent number: 11770550
    Abstract: Provided are an encoding device using predictive coding in a screen and a method thereof, and a decoding device and a method thereof. The encoding device is capable of generating a prediction block of a current block according to one of methods for generating a plurality of predetermined prediction blocks, and outputting at least one of encoding information and differential blocks as bitstream by entropy encoding according to whether differential blocks are encoded or not.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: September 26, 2023
    Assignees: Electronics and Telecommunications Research Institute, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Sung Chang Lim, Hae Chul Choi, Se Yoon Jeong, Suk Hee Cho, Hui Yong Kim, Jin Ho Lee, Ha Hyun Lee, Jong Ho Kim, Jin Soo Choi, Jin Woong Kim, Gwang Hoon Park, Kyung Yong Kim, Dong Gyu Sim, Seoung Jun Oh
  • Method and device for encoding/decoding images
    Patent number: 11770534
    Abstract: A method and a device for encoding/decoding images are disclosed. The method for encoding images comprises the steps of: deriving a scan type of a residual signal for a current block according to whether or not the current block is a transform skip block; and applying the scan type to the residual signal for the current block, wherein the transform skip block is a block to which transform for the current block is not applied and is specified on the basis of information indicating whether or not transform for the current block is to be applied.
    Type: Grant
    Filed: May 31, 2022
    Date of Patent: September 26, 2023
    Assignees: Electronics and Telecommunications Research Institute, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Hui Yong Kim, Sung Chang Lim, Jin Ho Lee, Jin Soo Choi, Jin Woong Kim, Gwang Hoon Park, Kyung Yong Kim
  • IMAGE ENCODING/DECODING METHOD AND APPARATUS, AND RECORDING MEDIUM FOR STORING BITSTREAM
    Publication number: 20230300340
    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: Application
    Filed: April 19, 2023
    Publication date: September 21, 2023
    Applicants: Electronics and 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
  • METHOD AND DEVICE FOR ENCODING AND DECODING IMAGE
    Publication number: 20230300362
    Abstract: An image decoding method according to the present invention includes reconstructing a residual block by inverse-quantizing and inverse-transforming an entropy-decoded residual block, generating a prediction block by performing intra prediction on a current block, and reconstructing an picture by adding the reconstructed residual block to the prediction block, wherein generating the prediction block includes generating a final prediction value of a prediction target pixel included in the current block based on a first prediction value of the prediction target pixel and a final correction value calculated by performing an arithmetic right shift on a two's complementary integer representation for an initial correction value of the prediction target pixel by a binary digit of 1. Accordingly, upon image encoding/decoding, computation complexity may be reduced.
    Type: Application
    Filed: May 22, 2023
    Publication date: September 21, 2023
    Inventors: Hui Yong KIM, Jin Ho LEE, Sung Chang LIM, Jin Soo CHOI, Jin Woong KIM
  • Image encoding/decoding method and device, and recording medium in which bitstream is stored
    Patent number: 11765386
    Abstract: Disclosed herein is a method of decoding an image. The method includes generating an inter prediction block by performing inter prediction with respect to a current block, generating an intra prediction block by performing intra prediction with respect to the current block, determining a first weight and a second weight, and generating a final prediction block by respectively applying the first weight and the second weight to the inter prediction block and the intra prediction block. The generating of the intra prediction block includes generating the intra prediction block using a predefined intra prediction mode.
    Type: Grant
    Filed: August 18, 2022
    Date of Patent: September 19, 2023
    Assignees: Electronics and Telecommunications Research Institute, INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY
    Inventors: Sung Chang Lim, Jung Won Kang, Ha Hyun Lee, Jin Ho Lee, Hui Yong Kim, Yung Lyul Lee, Ji Yeon Jung, Nam Uk Kim, Myung Jun Kim, Yang Woo Kim, Dae Yeon Kim, Jae Gon Kim
  • Method and device for encoding/decoding images
    Patent number: 11765356
    Abstract: A method and a device for encoding/decoding images are disclosed. The method for encoding images comprises the steps of: deriving a scan type of a residual signal for a current block according to whether or not the current block is a transform skip block; and applying the scan type to the residual signal for the current block, wherein the transform skip block is a block to which transform for the current block is not applied and is specified on the basis of information indicating whether or not transform for the current block is to be applied.
    Type: Grant
    Filed: May 31, 2022
    Date of Patent: September 19, 2023
    Assignees: Electronics and Telecommunications Research Institute, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Hui Yong Kim, Sung Chang Lim, Jin Ho Lee, Jin Soo Choi, Jin Woong Kim, Gwang Hoon Park, Kyung Yong Kim
  • Method and apparatus for transform-based image encoding/decoding
    Patent number: 11758136
    Abstract: The present invention relates to a method and apparatus for encoding and decoding a video image based on transform. The method for decoding a video includes: determining a transform mode of a current block; inverse-transforming residual data of the current block according to the transform mode of the current block; and rearranging the inverse-transformed residual data of the current block according to the transform mode of the current block, wherein the transform mode includes at least one of SDST (Shuffling Discrete Sine Transform), SDCT (Shuffling Discrete cosine Transform), DST (Discrete Sine Transform) or DCT (Discrete Cosine Transform).
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: September 12, 2023
    Assignees: Electronics and Telecommunications Research Institute, Industry Academy Cooperation Foundation of Sejong University
    Inventors: Sung Chang Lim, Jung Won Kang, Hyun Suk Ko, Jin Ho Lee, Ha Hyun Lee, Dong San Jun, Seung Hyun Cho, Hui Yong Kim, Jin Soo Choi, Yung Lyul Lee, Nam Uk Kim, Jun Woo Choi
  • Method and device for encoding/decoding image using geometrically modified picture
    Patent number: 11758128
    Abstract: The present invention relates to a method and apparatus for video encoding/decoding by using a geometric modified picture. The encoding method according to the present invention includes: generating a geometric modified picture by geometrically modifying a reference picture; and generating a first prediction block of a current block by performing inter prediction referencing the geometric modified picture.
    Type: Grant
    Filed: August 17, 2022
    Date of Patent: September 12, 2023
    Assignees: 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
  • METHOD, APPARATUS AND RECORDING MEDIUM FOR ENCODING/DECODING IMAGE USING FEATURE MAP OF ARTIFICIAL NEURAL NETWORK
    Publication number: 20230281960
    Abstract: Disclosed herein is an encoding method. The encoding method includes extracting a feature map from an input image, determining an encoding feature map based on the extracted feature map, generating a converted feature map by performing conversion on the encoding feature map, and performing encoding on the converted feature map.
    Type: Application
    Filed: February 21, 2023
    Publication date: September 7, 2023
    Applicants: Electronics and Telecommunications Research Institute, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Youn-Hee KIM, Se-Yoon JEONG, Ji-Hoon DO, Joo-Young LEE, Hyoung-Jin KWON, Dong-Hyun KIM, Jong-Ho KIM, Sung-Chang LIM, Woong LIM, Jin-Soo CHOI, Tae-Jin LEE, Hui-Yong KIM, Chang-Kyun CHOI, Jung-Heum KANG, Sung-Ho BAE, Hye-Won JEONG