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 image
    Patent number: 9560384
    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: October 17, 2012
    Date of Patent: January 31, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • ADAPTIVE TRANSFORM METHOD BASED ON IN-SCREEN PREDICTION AND APPARATUS USING THE METHOD
    Publication number: 20170026643
    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: October 7, 2016
    Publication date: January 26, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • ADAPTIVE TRANSFORM METHOD BASED ON IN-SCREEN PREDICTION AND APPARATUS USING THE METHOD
    Publication number: 20170026644
    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: October 7, 2016
    Publication date: January 26, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • Method and apparatus for encoding image, and method and apparatus for decoding image
    Patent number: 9554140
    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: October 13, 2016
    Date of Patent: January 24, 2017
    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: 9554144
    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: December 16, 2015
    Date of Patent: January 24, 2017
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • METHOD AND APPARATUS FOR PROCESSING MULTIVIEW VIDEO SIGNALS
    Publication number: 20170006302
    Abstract: A method for processing multiview video signals, according to the present invention, comprises: generating a merge candidate list with respect to a current block; inducing a motion vector of the current block on the basis of a merge index of the current block, which has been obtained from a bitstream; obtaining a prediction value of the current block using the motion vector; and reconstructing the current block by adding the prediction value and a residual value of the current block.
    Type: Application
    Filed: March 18, 2015
    Publication date: January 5, 2017
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE USING TRANSFORM SKIP FLAG
    Publication number: 20160381362
    Abstract: A method for decoding an image, according to the present invention, comprises the steps of: deciding a prediction mode that corresponds to a chroma component block; deciding a transform skip mode of the chroma component block from a plurality of transform skip mode candidates, according to the prediction mode that corresponds to the chroma component block; and reverse-transforming the chroma component block on the basis of the transform skip mode that is decided.
    Type: Application
    Filed: September 7, 2016
    Publication date: December 29, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • METHOD AND APPARATUS FOR ENCODING IMAGE, AND METHOD AND APPARATUS FOR DECODING IMAGE
    Publication number: 20160337653
    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: July 25, 2016
    Publication date: November 17, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • Method and apparatus for encoding image, and method and apparatus for decoding image
    Patent number: 9497477
    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: July 25, 2016
    Date of Patent: November 15, 2016
    Assignee: KT CORPORATION
    Inventors: Bae Keun Lee, Jae Cheol Kwon, Joo Young Kim
  • METHOD AND APPARATUS FOR ENTROPY ENCODING/DECODING A TRANSFORM COEFFICIENT
    Publication number: 20160330447
    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: Application
    Filed: July 18, 2016
    Publication date: November 10, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Bae-Keun LEE, Yu-Mi SOHN
  • METHOD AND APPARATUS FOR ENTROPY ENCODING/DECODING A TRANSFORM COEFFICIENT
    Publication number: 20160330483
    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: Application
    Filed: July 18, 2016
    Publication date: November 10, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Bae-Keun Lee, Yu-Mi SOHN
  • IMAGE ENCODING AND DECODING METHOD SUPPORTING PLURALITY OF LAYERS AND APPARATUS USING SAME
    Publication number: 20160330442
    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: Application
    Filed: July 18, 2016
    Publication date: November 10, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND APPARATUS FOR ENCODING/DECODING SCALABLE VIDEO SIGNAL
    Publication number: 20160330461
    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: July 20, 2016
    Publication date: November 10, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND DEVICE FOR ENCODING/DECODING MULTI-LAYER VIDEO SIGNAL
    Publication number: 20160330463
    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 20, 2016
    Publication date: November 10, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • MULTILAYER VIDEO SIGNAL ENCODING/DECODING METHOD AND DEVICE
    Publication number: 20160330462
    Abstract: The multilayer video signal decoding method according to the present invention is characterised in that whether or not a corresponding picture in a lower layer is being used as an inter layer reference picture for a current picture in an upper layer is determined on the basis of a time level identifier for the lower layer, and if the corresponding picture in the lower layer is being used as an inter layer reference picture for the current picture in the upper layer, inter layer prediction of the current picture is carried out using the corresponding picture, and the current picture is restored using a prediction sample obtained by means of inter layer prediction and a residual sample of the current picture.
    Type: Application
    Filed: July 20, 2016
    Publication date: November 10, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • SCALABLE VIDEO SIGNAL ENCODING/DECODING METHOD AND APPARATUS
    Publication number: 20160330458
    Abstract: A scalable video signal decoding method according to the present invention comprises determining a corresponding picture of a reference layer used for inter-layer prediction of a current picture within a current layer, generating an interlayer reference picture by up-sampling the determined corresponding picture, generating a reference picture list including the interlayer reference picture, and performing an inter prediction of the current picture on the basis of the reference picture list.
    Type: Application
    Filed: July 18, 2016
    Publication date: November 10, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND DEVICE FOR ENCODING/DECODING MULTI-LAYER VIDEO SIGNAL
    Publication number: 20160330443
    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 20, 2016
    Publication date: November 10, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Joo Young KIM
  • METHOD AND APPARATUS FOR ENTROPY ENCODING/DECODING A TRANSFORM COEFFICIENT
    Publication number: 20160330482
    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: Application
    Filed: July 18, 2016
    Publication date: November 10, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Bae-Keun LEE, Yu-Mi SOHN
  • METHOD FOR INDUCING A MERGE CANDIDATE BLOCK AND DEVICE USING SAME
    Publication number: 20160323593
    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 parallelly performing the method for inducing a merge candidate, parallel processing is enabled and the computation amount and implementation complexity are reduced.
    Type: Application
    Filed: July 14, 2016
    Publication date: November 3, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM
  • METHOD AND APPARATUS FOR COEFFICIENT SCAN BASED ON PARTITION MODE OF PREDICTION UNIT
    Publication number: 20160316209
    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: Application
    Filed: July 7, 2016
    Publication date: October 27, 2016
    Applicant: KT CORPORATION
    Inventors: Bae Keun LEE, Jae Cheol KWON, Joo Young KIM