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).

  • Method and apparatus for encoding/decoding multilayer video signal
    Patent number: 10187641
    Abstract: A method for decoding a multilayer video signal, according to the present invention, is characterized by: inducing the number of active references of a current picture in consideration of whether the maximum number of active reference pictures of the current picture in a current layer is limited; obtaining a reference layer identifier based on the number of active references; determining an active reference picture of the current picture using a reference layer identifier; generating an interlayer reference picture by upsampling the active reference picture, and performing interlayer prediction of the current picture using an interlayer reference picture.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: January 22, 2019
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Method and device for processing multi-view video signal
    Patent number: 10187658
    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: Grant
    Filed: July 2, 2015
    Date of Patent: January 22, 2019
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Method for inducing a merge candidate block and device using same
    Patent number: 10182237
    Abstract: The present invention relates to a method for inducing a merge candidate block and a device using same. An image decoding method involves decoding motion estimation region (MER) related information; determining whether or not a predicted target block and a spatial merge candidate block are included in the same MER; and determining the spatial merge candidate block to be an unavailable merge candidate block when the predicted target block and the spatial merge candidate block are included in the same MER. Accordingly, by parallely performing the method for inducing a merge candidate, parallel processing is enabled and the computation amount and implementation complexity are reduced.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: January 15, 2019
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Method and apparatus for encoding/decoding multilayer video signal
    Patent number: 10178392
    Abstract: A method for decoding a multilayer video signal, according to the present invention, is characterized by: inducing the number of active references of a current picture, in consideration of whether the maximum number of active reference pictures of the current picture in a current layer is limited; obtaining a reference layer identifier based on the number of active references, determining an active reference picture of the current picture using a reference layer identifier, generating a reference picture list including the active reference pictures, and performing interlayer prediction of the current picture using the reference picture list.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: January 8, 2019
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Method for inducing a merge candidate block and device using same
    Patent number: 10165295
    Abstract: The present invention relates to a method for inducing a merge candidate block and a device using same. An image decoding method involves decoding motion estimation region (MER) related information; determining whether or not a predicted target block and a spatial merge candidate block are included in the same MER; and determining the spatial merge candidate block to be an unavailable merge candidate block when the predicted target block and the spatial merge candidate block are included in the same MER. Accordingly, by parallely performing the method for inducing a merge candidate, parallel processing is enabled and the computation amount and implementation complexity are reduced.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: December 25, 2018
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Method for inducing a merge candidate block and device using same
    Patent number: 10165294
    Abstract: The present invention relates to a method for inducing a merge candidate block and a device using same. An image decoding method involves decoding motion estimation region (MER) related information; determining whether or not a predicted target block and a spatial merge candidate block are included in the same MER; and determining the spatial merge candidate block to be an unavailable merge candidate block when the predicted target block and the spatial merge candidate block are included in the same MER. Accordingly, by parallely performing the method for inducing a merge candidate, parallel processing is enabled and the computation amount and implementation complexity are reduced.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: December 25, 2018
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • Image encoding and decoding method supporting plurality of layers and apparatus using same
    Patent number: 10154259
    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: August 7, 2017
    Date of Patent: December 11, 2018
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Image encoding and decoding method supporting plurality of layers and apparatus using same
    Patent number: 10148950
    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: August 7, 2017
    Date of Patent: December 4, 2018
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Scalable video signal encoding/decoding method and apparatus
    Patent number: 10148949
    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: August 7, 2017
    Date of Patent: December 4, 2018
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • Image encoding and decoding method supporting plurality of layers and apparatus using same
    Patent number: 10148952
    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: December 30, 2017
    Date of Patent: December 4, 2018
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Joo Young Kim
  • SCALABLE VIDEO SIGNAL ENCODING/DECODING METHOD AND DEVICE
    Publication number: 20180343457
    Abstract: A scalable video signal decoding method according to the present invention determines, based on the temporal identifier of a lower layer, whether a corresponding picture of the lower layer is used as an inter-layer reference picture for the current picture of an upper layer, creates a list of reference pictures for the current picture based on the determination, and performs inter-layer prediction on the current block in the current picture based on the created list of reference pictures.
    Type: Application
    Filed: July 18, 2018
    Publication date: November 29, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • ADAPTIVE TRANSFORM METHOD BASED ON IN-SCREEN PREDICTION AND APPARATUS USING THE METHOD
    Publication number: 20180332285
    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: Application
    Filed: July 23, 2018
    Publication date: November 15, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • METHOD AND DEVICE FOR ENCODING/DECODING MULTI-LAYER VIDEO SIGNAL
    Publication number: 20180324445
    Abstract: A method for decoding a multi-layer video signal, according to the present invention, determines whether a corresponding picture in a lower layer is used as an inter-layer reference picture for a current picture in an upper layer, on the basis of a temporal level identifier of the lower layer, performs inter-layer prediction for the current picture by using the corresponding picture if the corresponding picture in the lower layer is used as the inter-layer reference picture for the current picture in the upper layer, reconstructs the current picture by using a prediction sample acquired through the inter-layer prediction and a residual sample of the current picture, and selectively applies a loop filter to a tile boundary of the reconstructed current picture on the basis of a layer filter flag for the upper layer.
    Type: Application
    Filed: July 16, 2018
    Publication date: November 8, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND DEVICE FOR ENCODING/DECODING MULTI-LAYER VIDEO SIGNAL
    Publication number: 20180309985
    Abstract: A method for decoding a multi-layer video signal, according to the present invention, determines whether a corresponding picture in a lower layer is used as an inter-layer reference picture for a current picture in an upper layer, on the basis of a time level identifier of the lower layer, and restrictively performs inter-layer prediction for the current picture on the basis of a tile boundary alignment flag indicating whether tile alignment is performed between the upper layer and the lower layer if the corresponding picture in the lower layer is used as the inter-layer reference picture for the current picture in the upper layer.
    Type: Application
    Filed: July 2, 2018
    Publication date: October 25, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND APPARATUS FOR ENCODING/DECODING MULTILAYER VIDEO SIGNAL
    Publication number: 20180295359
    Abstract: A scalable video signal decoding method, according to the present invention, determines a corresponding picture belonging to a lower layer used for an inter-layer prediction of a current picture belonging to an upper layer, and performs the inter-layer prediction of the current picture by using the corresponding picture in the determined lower layer, wherein the inter-layer prediction is restrictively performed according to a tile boundary alignment flag indicating whether tiles between the upper layer and the lower layer are aligned.
    Type: Application
    Filed: June 12, 2018
    Publication date: October 11, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • Method and apparatus for entropy encoding/decoding a transform coefficient
    Patent number: 10091529
    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: October 2, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Bae-Keun Lee, Yu-Mi Sohn
  • Method and apparatus for coefficient scan based on partition mode of prediction unit
    Patent number: 10080023
    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: November 9, 2017
    Date of Patent: September 18, 2018
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • METHOD AND APPARATUS FOR ENCODING/DECODING SCALABLE VIDEO SIGNAL
    Publication number: 20180255309
    Abstract: A method for decoding a scalable video signal, according to the present invention, comprises: determining a corresponding picture belonging to a lower layer, which is used for inter-layer prediction of a current picture belonging to an upper layer; and performing inter-layer prediction of the current picture by using the determined corresponding picture in the lower layer, wherein the inter-layer prediction is limitedly performed depending on tile alignment between the upper layer and the lower layer.
    Type: Application
    Filed: May 3, 2018
    Publication date: September 6, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND APPARATUS FOR ENCODING/DECODING SCALABLE VIDEO SIGNAL
    Publication number: 20180255310
    Abstract: A method for decoding a scalable video signal, according to the present invention, comprises: determining whether a corresponding picture in a lower layer is used as an inter-layer reference picture for a current picture in an upper layer, based on a temporal level identifier of the lower layer; and performing inter-layer prediction of the current picture using the corresponding picture, when the corresponding picture in the lower layer is used as the inter-layer reference picture for the current picture in the upper layer, wherein the inter-layer prediction is limitedly performed depending on tile alignment between the upper layer and the lower layer.
    Type: Application
    Filed: May 3, 2018
    Publication date: September 6, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL
    Publication number: 20180255299
    Abstract: Disclosed is a method for processing a video signal according to the present invention, the method including: determining an intra prediction mode of a current block; deriving a reference sample for intra prediction of the current block; and performing intra prediction of the current block based on the intra prediction mode and the reference sample.
    Type: Application
    Filed: August 29, 2016
    Publication date: September 6, 2018
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM