Patents by Inventor Sung-Chang Lim

Sung-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).

  • IMAGE ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM STORING BITSTREAM
    Publication number: 20230353735
    Abstract: The present invention relates to an image encoding and decoding method. An image decoding method for the same includes: determining a reference sample of a current block; performing filtering for the reference sample on the basis of a feature of an area where the reference sample is included; and performing intra-prediction by using the reference sample for which filtering is performed.
    Type: Application
    Filed: July 3, 2023
    Publication date: November 2, 2023
    Inventors: Hyun Suk KO, Sung Chang LIM, Jung Won KANG, Jin Ho LEE, Ha Hyun LEE, Dong San JUN, Hui Yong KIM
  • METHOD AND APPARATUS FOR INTER PREDICTION USING MOTION VECTOR CANDIDATE BASED ON TEMPORAL MOTION PREDICTION
    Publication number: 20230353774
    Abstract: An inter prediction method according to the present invention comprises: a step for deriving reference motion information related to a unit to be decoded in a current picture; and a step for performing motion compensation for the unit to be decoded, using the reference motion information that has been derived. According to the present invention, image encoding/decoding efficiency can be enhanced.
    Type: Application
    Filed: July 5, 2023
    Publication date: November 2, 2023
    Inventors: Sung Chang LIM, Hui Yong KIM, Se Yoon JEONG, Suk Hee CHO, Jong Ho KIM, Ha Hyun LEE, Jin Ho LEE, Jin Soo CHOI, Jin Woong KIM, Chie Teuk AHN
  • METHOD AND APPARATUS FOR IMAGE ENCODING/DECODING, AND RECORDING MEDIUM STORING BITSTREAM
    Publication number: 20230353755
    Abstract: An image encoding/decoding method and apparatus for performing intra prediction mode based intra prediction are provided. An image decoding method may comprise decoding an intra prediction mode of a current block, deriving at least one intra prediction mode from the decoded intra prediction mode of the current block, generating two or more intra prediction blocks using the intra prediction mode of the current block and the derived intra prediction mode, and generating an intra prediction block of the current block based on the two or more intra prediction blocks.
    Type: Application
    Filed: July 6, 2023
    Publication date: November 2, 2023
    Applicant: LX SEMICON CO., LTD.
    Inventors: Sung Chang LIM, Hyun Suk KO, Jung Won KANG, Jin Ho Lee, Ha Hyun LEE, Dong San Jun, Hui Yong KIM
  • IMAGE ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM HAVING BITSTREAM STORED THEREON
    Publication number: 20230353776
    Abstract: The present invention relates to a method for encoding and decoding an image. The method for decoding an image includes: deriving an initial motion vector from a merge candidate list of a current block; deriving a refined motion vector using the initial motion vector; and generating a prediction block of the current block using the refined motion vector.
    Type: Application
    Filed: July 3, 2023
    Publication date: November 2, 2023
    Inventors: Ha Hyun LEE, Jung Won KANG, Hyun Suk KO, Sung Chang LIM, Jin Ho LEE, Dong San JUN, Seung Hyun CHO, Hui Yong KIM, Jin Soo CHOI
  • Image encoding/decoding method and device, and recording medium storing bitstream
    Patent number: 11805256
    Abstract: The present invention relates to an image encoding and decoding method. An image decoding method for the same may include: obtaining transform coefficients of a current block from a bitstream; determining a scanning unit and a scanning order of the current block; and rearranging the transform coefficients of the current block by scanning the same base on the determined scanning unit and scanning order.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: October 31, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang Lim, Hyun Suk Ko, Jung Won Kang, Jin Ho Lee, Ha Hyun Lee, Dong San Jun, Hui Yong Kim
  • Video encoding/decoding method and device, and recording medium having bitstream stored therein
    Patent number: 11805247
    Abstract: An image encoding/decoding method and apparatus for performing intra prediction are provided. An image decoding method of the present invention comprises deriving an intra-prediction mode for a current block, determining whether or not a left boundary or an upper boundary of the current block is a boundary of a predetermined image region, configuring a reference sample by using at least one reconstructed sample included in at least one reconstructed sample line adjacent to the current block based on the determination result, and performing intra-prediction for the current block based on the intra-prediction mode and the reference sample.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: October 31, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seung Hyun Cho, Jung Won Kang, Sung Chang Lim, Hyun Suk Ko, Dong San Jun, Jin Ho Lee, Ha Hyun Lee, Hui Yong Kim, Jin Soo Choi
  • Adaptive image encoding device and method
    Patent number: 11805243
    Abstract: Provided are an image encoding method and device. When carrying out image encoding for a block within a slice, at least one block in a restored block of the slice is set as a reference block. When this is done, the encoding parameters of the reference block are distinguished, and the block to be encoded is encoded adaptively based on the encoding parameters.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: October 31, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung Chang Lim, Jong Ho Kim, Hae Chui Choi, Hui Yong Kim, Ha Hyun Lee, Jin Ho Lee, Se Yoon Jeong, Suk Hee Cho, Jin Soo Choi, Jin Woo Hong, Jin Woong Kim
  • METHOD AND APPARATUS FOR ENCODING/DECODING INTRA PREDICTION MODE
    Publication number: 20230344994
    Abstract: An image decoding method, according to the present invention, includes the steps of: deriving an MPM candidate mode from neighboring blocks adjacent to a target block to be decoded; generating an MPM list using the MPM candidate mode derived from the neighboring blocks; and deriving an intra prediction mode for the target block to be decoded using the generated MPM list. According to the present invention, image compression efficiency can be improved.
    Type: Application
    Filed: June 30, 2023
    Publication date: October 26, 2023
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jin Ho LEE, Hui Yong KIM, Sung Chang LIM, Jin Soo CHOI, Jin Woong KIM
  • VIDEO ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM HAVING BITSTREAM STORED THEREIN
    Publication number: 20230344993
    Abstract: An image encoding/decoding method and apparatus for performing intra prediction are provided. An image decoding method of the present invention comprises deriving an intra-prediction mode for a current block, determining whether or not a left boundary or an upper boundary of the current block is a boundary of a predetermined image region, configuring a reference sample by using at least one reconstructed sample included in at least one reconstructed sample line adjacent to the current block based on the determination result, and performing intra-prediction for the current block based on the intra-prediction mode and the reference sample.
    Type: Application
    Filed: June 29, 2023
    Publication date: October 26, 2023
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seung Hyun CHO, Jung Won KANG, Sung Chang LIM, Hyun Suk KO, Dong San JUN, Jin Ho LEE, Ha Hyun LEE, Hui Yong KIM, Jin Soo CHOI
  • Method and Device for Encoding/Decoding Image and Recording Medium Having Bitstream Stored Thereon
    Publication number: 20230344989
    Abstract: The present invention relates to an image decoding method. The image decoding method comprises deriving initial motion information of a current block from at least one of motion information of a spatial neighbor block, motion information of a temporal neighbor block, and pre-defined motion information, generating refined motion information by performing motion information refinement for the initial motion information and generating a prediction block of the current block by using the refined motion information.
    Type: Application
    Filed: July 6, 2023
    Publication date: October 26, 2023
    Applicant: LX SEMICON CO., LTD.
    Inventors: Sung Chang LIM, HA Hyun LEE, Jung Won KANG, Jin Ho LEE, Hui Yong KIM
  • METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE, AND RECORDING MEDIUM FOR STORING BITSTREAM
    Publication number: 20230344992
    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: July 3, 2023
    Publication date: October 26, 2023
    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
  • Method and device for encoding/decoding image, and recording medium for storing bitstream
    Patent number: 11800099
    Abstract: An image encoding/decoding method is disclosed. An image decoding method of the present invention may comprise identifying a region by partitioning an image, and determining a prediction mode of the region on the basis of at least one of a size of the region, a partition shape, and a coding parameter of the region. The determined prediction mode of the region may be determined as a prediction mode of all coding blocks included in the region.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: October 24, 2023
    Assignees: 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 Chui Choi, Dae Hyeok Gwon
  • Image encoding/decoding method and recording medium therefor
    Patent number: 11800113
    Abstract: The present invention relates to a video encoding and decoding method. A video decoding method for the same may include: obtaining granularity information; determining a sharing region based on the granularity information; and generating a prediction block of a current block by using motion information of the sharing region when the current block corresponds to the sharing region.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: October 24, 2023
    Assignee: Electronics and Telecommunications Research Institute
    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
  • Image encoding/decoding method and apparatus with sub-block intra prediction
    Patent number: 11800116
    Abstract: An image encoding/decoding method and apparatus for performing intra prediction are provided. An image decoding method of the present invention comprises deriving an intra prediction mode for a current block, selecting at least one reconstructed sample line neighboring to the current block, constructing a reference sample using at least one reconstructed sample included in the at least one reconstructed sample line, and performing intra prediction for the current block based on the intra prediction mode and the reference sample.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: October 24, 2023
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong San Jun, Jin Ho Lee, Jung Won Kang, Hyun Suk Ko, Sung Chang Lim, Ha Hyun Lee, Seung Hyun Cho, Hui Yong Kim, Jin Soo Choi
  • IMAGE ENCODING/DECODING METHOD USING PREDICTION BLOCK AND APPARATUS FOR SAME
    Publication number: 20230336779
    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 23, 2023
    Publication date: October 19, 2023
    Inventors: Jin Ho LEE, Hui Yong KIM, Sung Chang LIM, Jin Soo CHOI, Jin Woong KIM
  • VIDEO ENCODING AND DECODING METHODS AND DEVICE USING SAME
    Publication number: 20230336722
    Abstract: The present invention relates to video encoding/decoding methods and device, wherein the video encoding method according to the invention comprises the following steps: acquiring information of peripheral blocks; setting the information about a current block based on the information of the peripheral blocks; and encoding the current block based on the set information, wherein the current block and the peripheral blocks may be a CU (coding unit).
    Type: Application
    Filed: May 3, 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
  • IMAGE ENCODING/DECODING METHOD AND DEVICE, AND RECORDING MEDIUM IN WHICH BITSTREAM IS STORED
    Publication number: 20230336766
    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: June 22, 2023
    Publication date: October 19, 2023
    Applicant: LX SEMICON CO., LTD.
    Inventors: Sung Chang LIM, Jung Won KANG, Ha Hyun LEE, Jin Ho LEE, Hui Yong KIM
  • 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