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).

  • Patent number: 9769478
    Abstract: A scalable video signal decoding method according to the present invention decodes a corresponding picture of a reference layer corresponding to a current picture of a current layer, generates an inter-layer reference picture by up-sampling the decoded corresponding picture, generates a reference picture list including a temporal reference picture and an inter-layer reference picture, and inter-predicting the current picture on the basis of the generated reference picture list.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: September 19, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Patent number: 9762910
    Abstract: An image decoding method supporting a plurality of layers according to the present invention may comprise the steps of: generating an inter-layer reference picture set with respect to one or more reference layers to which a current picture can refer; generating an initial reference picture list including the inter-layer reference picture set; and predicting the current picture on the basis of the initial reference picture list. Accordingly, the present invention provides a method for generating a reference picture list including a picture of a layer, which is different from a layer to be currently encoded and decoded, and an apparatus using the same.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: September 12, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Patent number: 9762909
    Abstract: An image decoding method supporting a plurality of layers according to the present invention may comprise the steps of: receiving location information on a location in which an inter-layer reference picture set for one or more reference layers, to which a current picture can refer, is added to a reference picture list; generating an initial reference picture list including the inter-layer reference picture set on the basis of the location information; and predicting the current picture on the basis of the initial reference picture list. Accordingly, the present invention provides a method for signaling location information on a location in which an inter-layer reference picture is added to a reference picture list, and an apparatus using the same.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: September 12, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Patent number: 9743112
    Abstract: A method and apparatus for entropy coding and decoding a transformation block are provided. The method of entropy coding a transformation block includes: determining, according to a certain scan order, a location of a last significant transformation coefficient having a non-zero value from among transformation coefficients included in a transformation block having a certain size; and coding information about the determined location of the last significant transformation coefficient by using a horizontal axis direction location of the last significant transformation coefficient and a vertical axis direction location in the transformation block of the last significant transformation coefficient.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: August 22, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Bae-Keun Lee, Yu-Mi Sohn
  • Patent number: 9736480
    Abstract: Disclosed is an adaptive transform method based on an in-screen prediction, and an apparatus using the method. A method for encoding an image can comprise a step of determining in-screen prediction mode groups, and a step of transforming by using a different transform method according to the in-screen prediction mode group. As a result, transforming can be performed by applying the different transform method according to the in-screen prediction mode group.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: August 15, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Patent number: 9729893
    Abstract: The present invention discloses a method and an apparatus for encoding and decoding video. A video decoding method comprises reconstructing a residual value by entropy-decoding received bitstream and dequantizing and inverse-transforming residual value information, generating a final prediction unit by performing inter prediction on a prediction unit which is partitioned from a coding unit into at least two prediction units by asymmetric motion partitioning (AMP), the two partitioned prediction units comprising a first partitioned prediction unit and a second partitioned prediction unit, and reconstructing a picture by adding the final prediction unit to the residual values.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: August 8, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Publication number: 20170223380
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
    Type: Application
    Filed: April 18, 2017
    Publication date: August 3, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • Publication number: 20170164004
    Abstract: A multiview video signal processing method according to the present invention determines an intra prediction mode of a current depth block, determines a partition pattern of the current depth block according to the determined intra prediction mode, induces a predicted depth value of the current depth block on the basis of the determined partition pattern, and restores the current depth block by using the predicted depth value and an offset value (DcOffset) for the current depth block.
    Type: Application
    Filed: July 2, 2015
    Publication date: June 8, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • Publication number: 20170164003
    Abstract: A multiview video signal processing method according to the present invention determines an intra prediction mode of a current depth block, determines a partition pattern of the current depth block according to the determined intra prediction mode, induces a predicted depth value of the current depth block on the basis of the determined partition pattern, and restores the current depth block by using the predicted depth value and an offset value (DcOffset) for the current depth block.
    Type: Application
    Filed: June 18, 2015
    Publication date: June 8, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • Patent number: 9661346
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: May 23, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Patent number: 9661354
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: May 23, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Patent number: 9661352
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: May 23, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Publication number: 20170142428
    Abstract: A method for decoding a multilayer video signal, according to the present invention, is characterized by: selecting, from a corresponding picture of at least one reference layer, a candidate reference picture of a current picture by using sublayer number information relating to the reference layer and a temporal ID of the current picture belonging to a current layer, determining the number of active references for a current picture based on the number of the candidate reference picture, acquiring a reference layer Identifier (ID) based on the determined number of active references, determining an active reference picture for the current picture using the reference layer ID, generating a reference picture list for the current picture, the reference picture list including a temporal reference picture and the active reference picture, and performing inter-layer prediction for the current picture based on the reference picture list.
    Type: Application
    Filed: January 6, 2015
    Publication date: May 18, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • Publication number: 20170142443
    Abstract: The present invention provides a method and apparatus for processing a multi-view video signal, the method including: determining a prediction mode of a current depth block; determining a partition mode of the current texture block when the current texture block is a block encoded in an inter mode; obtaining a motion vector of each partition based on the partition mode; and performing inter prediction on the current texture block by using the motion vector through depth-based.
    Type: Application
    Filed: July 2, 2015
    Publication date: May 18, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • Publication number: 20170134747
    Abstract: A method for decoding a multilayer video signal, according to the present invention, is characterized by: selecting candidate reference pictures for a current picture from among corresponding pictures in one or more reference layers by using either a maximum temporal level indicator for a current layer or a temporal level identifier for the current picture belonging to the current layer; inducing the number of active reference layer pictures for the current picture on the basis of the number of the candidate reference pictures; obtaining a reference layer identifier on the basis of the number of the active reference layer pictures; determining an active reference picture for use in the interlayer prediction of the current picture by using the reference layer identifier; and performing interlayer prediction on the current picture by using the active reference picture.
    Type: Application
    Filed: January 6, 2015
    Publication date: May 11, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • Patent number: 9648331
    Abstract: Provided are a method and an apparatus for coefficient scan on the base of a partition mode of a prediction unit. The method comprises the steps of: determining a scan method on the basis of a partition mode of a prediction unit; and encoding the information about the scan method, wherein the scan method is determined, on the basis of RDO (Rate Distortion optimization), from among the extracted candidate scan methods which have been extracted with consideration of the shapes of the partitions of the partition mode.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: May 9, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Publication number: 20170111647
    Abstract: The present invention discloses a method and an apparatus for encoding and decoding video. A video decoding method comprises reconstructing a residual value by entropy-decoding received bitstream and dequantizing and inverse-transforming residual value information, generating a final prediction unit by performing inter prediction on a prediction unit which is partitioned from a coding unit into at least two prediction units by asymmetric motion partitioning (AMP), the two partitioned prediction units comprising a first partitioned prediction unit and a second partitioned prediction unit, and reconstructing a picture by adding the final prediction unit to the residual values.
    Type: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • Publication number: 20170099503
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
    Type: Application
    Filed: December 15, 2016
    Publication date: April 6, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • Publication number: 20170099504
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
    Type: Application
    Filed: December 15, 2016
    Publication date: April 6, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • Publication number: 20170099502
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: receiving image information that corresponds to a block to be decoded; performing entropy-decoding with respect to the image information that is received; deciding a transform skip mode of the block to be decoded from a plurality of transform skip mode candidates, based on the image information that is entropy-decoded; and reverse-transforming the block to be decoded based on the transform skip mode that is decided.
    Type: Application
    Filed: December 15, 2016
    Publication date: April 6, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM