Patents by Inventor Sehoon Yea

Sehoon Yea 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 device for coding residual signal in video coding system
    Patent number: 10674146
    Abstract: An image decoding method according to the present invention comprises the steps of: deriving quantized transform coefficients by unit of sub-blocks in a transform unit on the basis of residual information included in a bitstream; deriving transform coefficients on the basis of the quantized transform coefficients; generating a residual sample on the basis of the transform coefficients; generating a prediction sample on the basis of an inter prediction or an intra prediction; and restoring an image on the basis of the residual sample and the prediction sample. According to the present invention, a quantity of data required for a residual signal can be reduced, and an overall coding efficiency can be improved.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: June 2, 2020
    Assignee: LG Electronics Inc.
    Inventors: Jin Heo, Eunyong Son, Jaeho Lee, Seungwook Park, Sehoon Yea, Junghak Nam
  • Image encoding method and image decoding method
    Patent number: 10659758
    Abstract: A video decoding method that includes: receiving information for deriving motion information of a current block; deriving the motion information of the current block based on the received information for deriving the motion information; and performing prediction to generate predicted pixels of the current block based on the motion information of the current block, wherein the motion information of the current block is determined by using motion information of a reference block, wherein the reference block is determined based on a specific disparity vector, wherein the specific disparity vector is determined for an area in a picture to which the current block belongs, wherein the area which the specific disparity vector is determined is split based on a quad tree structure, and wherein the current block is a block of a texture picture and the reference block is a block in a reference view is disclosed.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: May 19, 2020
    Assignee: LG Electronics Inc.
    Inventors: Jaewon Sung, Sehoon Yea, Eunyong Son, Jiwook Jung
  • Depth picture coding method and device in video coding
    Patent number: 10659814
    Abstract: The present invention relates to 3D video coding device and method. A decoding method, according to the present invention, provides a 3D video decoding method. A decoding method comprises the steps of: obtaining a disparity value on the basis of a reference view and a predetermined value; deriving movement information of a current block in a depth picture on the basis of the disparity value; and generating a prediction sample of the current block on the basis of the movement information, wherein the reference view is a view of a reference picture in a reference picture list. According to the present invention, even when a base view cannot be accessed, a disparity vector can be derived on the basis of an available reference view index in a decoded picture buffer (DPB), and coding efficiency can be enhanced.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: May 19, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Junghak Nam, Sehoon Yea, Jungdong Seo, Sunmi Yoo
  • Method for encoding and decoding video signal, and apparatus therefor
    Patent number: 10638132
    Abstract: The present invention provides a method for encoding a video signal comprising the steps of: performing block division with respect to a target unit of the video signal, wherein the block division is performed on the basis of square division and/or non-square division; determining the optimal block partition on the basis of a rate distortion cost, when the target unit is divided into a plurality of non-square blocks; and performing CNT prediction coding on the non-square blocks resulting from the optimal block partition, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: April 28, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Moonmo Koo, Bumshik Lee, Sehoon Yea, Kyuwoon Kim
  • METHOD AND APPARATUS FOR CONTENT-AWARE POINT CLOUD COMPRESSION USING HEVC TILES
    Publication number: 20200107028
    Abstract: A method includes receiving a data cloud including a plurality of data points. The method further includes identifying each data point including a region-of-interest (ROI) and dividing the data cloud into a ROI cloud and one or more non-ROI clouds. The method includes performing a patch generation process on the ROI cloud, the patch generation process including generating a ROI patch from each data point including the ROI. The method includes performing a patch packing process on the ROI cloud, the patch packing process including: (i) mapping each ROI patch to a two dimensional (2D) map, (ii) determining whether at least two ROI patches from the plurality of ROI patches are located in more than one tile of the map, and (iii) in response to the determination that at least two ROI patches are located in more than one tile, moving each of the ROI patches to a tile.
    Type: Application
    Filed: September 11, 2019
    Publication date: April 2, 2020
    Applicant: Tencent America LLC
    Inventors: Arash Vosoughi, Sehoon Yea, Shan Liu
  • METHOD AND APPARATUS FOR VIDEO CODING
    Publication number: 20200105025
    Abstract: A method of processing point cloud data at a decoder can include receiving three dimensional (3D) coordinates of a set of points of a point cloud including first points and a current point. Each of the first points can be associated with a reconstructed attribute value. A group of neighboring points of the current point can be determined from the first points. A first index is received and the first index indicates a reconstructed attribute value selected from the reconstructed attribute values of the plurality of neighboring points. The reconstructed attributed value indicated by the first index is determined based on a rate-distortion decision function. An attribute distance for each of the neighboring points can be determined based on the reconstructed attribute values of the neighboring points.
    Type: Application
    Filed: September 4, 2019
    Publication date: April 2, 2020
    Applicant: Tencent America LLC
    Inventors: Sehoon Yea, Shan Liu
  • METHOD AND APPARATUS FOR VIDEO CODING
    Publication number: 20200107048
    Abstract: A method of processing point cloud data at a decoder can include receiving three dimensional (3D) coordinates of a set of points of a point cloud including first points and a current point. Each of the first points can be associated with a reconstructed attribute value. A group of neighboring points of the current point can be determined from the first points. An indicator is received. The indicator indicates whether reconstruction of the current point in a prediction step in a lifting scheme is based on a weighted average prediction of the reconstructed attribute values of the plurality of neighboring points. The current point is reconstructed based on the received indicator.
    Type: Application
    Filed: September 11, 2019
    Publication date: April 2, 2020
    Applicant: Tencent America LLC
    Inventors: Sehoon YEA, Shan LIU
  • Method and apparatus for encoding and decoding video signal
    Patent number: 10587873
    Abstract: The present invention provides a method for processing a video signal, comprising generating a prediction block for a neighbor block using a reconstructed reference pixel of the neighbor block when the neighbor block adjacent to a current block is intra-coded; determining a refined intra prediction mode of the neighbor block based on the prediction block, where the refined intra prediction mode represents a mode which minimizes an error between the prediction block and a reconstructed neighbor block; generating a prediction mode candidate list for the current block based on the refined intra prediction mode; selecting an intra prediction mode for the current block from the prediction mode candidate list; and performing a prediction for the current block based on the intra prediction mode.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: March 10, 2020
    Assignee: LG Electronics Inc.
    Inventors: Moonmo Koo, Sehoon Yea, Kyuwoon Kim, Bumshik Lee
  • Method and device for encoding/decoding 3D video
    Patent number: 10587894
    Abstract: The present invention relates to a device and a method for coding a multi-view video, a residual prediction method, according to the present invention, comprising the steps of: deriving a disparity vector of a current block; performing residual prediction on the current block on the basis of the disparity vector; and generating a residual prediction sample, wherein the disparity vector is not derived on the basis of a neighboring block of the current block, but is derived from a preset default vector. According to the present invention, the effect of prediction may be increased by performing residual prediction on the current block according to a certain condition, not only when the disparity vector is induced but also when the disparity vector is not induced from the neighboring block of the current block.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: March 10, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunmi Yoo, Jungdong Seo, Junghak Nam, Sehoon Yea
  • Method and device for processing a video signal by using an adaptive separable graph-based transform
    Patent number: 10567763
    Abstract: A method and a device for decoding a video signal using an adaptive separable graph-based transform. The method includes: receiving a transform index for a target block from the video signal in which the transform index indicates a graph-based transform to be applied to the target block; deriving a graph-based transform kernel corresponding to the transform index; and decoding the target block based on the graph-based transform kernel. The device includes: a parsing unit configured to receive a transform index for a target block from the video signal; and an inverse-transform unit configured to derive a graph-based transform kernel corresponding to the transform index and decode the target block based on the graph-based transform kernel.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: February 18, 2020
    Assignees: LG Electronics Inc.
    Inventors: Moonmo Koo, Sehoon Yea, Bumshik Lee, Amir Said, Hilmi Enes Egilmez, Antonio Ortega
  • Method for processing video signal, and apparatus therefor
    Patent number: 10567755
    Abstract: The present invention relates to a method for decoding a video signal, and an apparatus therefor, the method comprising the steps of: obtaining at least one first reference sample from a first reference picture which is different from a picture containing a current block; generating a first reference sample which is filtered by applying a filter to the obtained first reference sample; generating a reference sample array from the difference between the obtained first reference sample and the filtered first reference sample; obtaining first disparity vector information from the video signal; obtaining a first prediction sample from the generated reference sample array on the basis of the first disparity vector information; and restoring the current block on the basis of the first prediction sample.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: February 18, 2020
    Assignee: LG Electronics Inc.
    Inventors: Eunyong Son, Sehoon Yea
  • AMVR-based image coding method and apparatus in image coding system
    Patent number: 10547847
    Abstract: An image encoding method according to the present invention, which is performed by an encoding apparatus, comprises the steps of: generating an adaptive motion vector range (AMVR) enable flag; deriving a motion vector difference (MVD) with respect to a current block; deriving a representative MVD value of an MVD range including a value of the MVD from among a plurality of MVD ranges; generating a coded MVD corresponding to the representative MVD value; and outputting the AMVR enable flag and the coded MVD through a bit stream. According to the present invention, the amount of bits allocated to an MVD can be reduced and the overall coding efficiency can thus be increased.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: January 28, 2020
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyeongmoon Jang, Jaehyun Lim, Seungwook Park, Sehoon Yea
  • METHOD AND APPARATUS FOR VIDEO CODING
    Publication number: 20200021844
    Abstract: A method of processing point cloud data at a decoder can include receiving three dimensional (3D) coordinates of a set of points of a point cloud including first points and a current point. Each of the first points can be associated with a reconstructed attribute value. A group of neighboring points of the current point can be determined from the first points. An attribute distance for each of the neighboring points can be determined based on the reconstructed attribute values of the neighboring points. An attribute prediction of the current point can be determined based on the attribute distances of the neighboring points.
    Type: Application
    Filed: May 16, 2019
    Publication date: January 16, 2020
    Applicant: Tencent America LLC
    Inventors: Sehoon Yea, Shan Liu, Stephan Wenger
  • Method for encoding and decoding video signal
    Patent number: 10523945
    Abstract: The present invention provides a method for encoding a video signal comprising the steps of: obtaining activity information from the video signal, wherein the activity signal indicates information relating to edge characteristics of an image and includes edge orientation information and/or edge level information; determining conditionally non-linear transform (CNT) configuration information on the basis of the activity information; and performing CNT prediction coding on the basis of the CNT configuration information, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: December 31, 2019
    Assignee: LG Electronics Inc.
    Inventors: Moonmo Koo, Sehoon Yea, Eunyong Son, Kyuwoon Kim, Jin Heo, Junghak Nam, Bumshik Lee
  • Method for encoding/decoding image on basis of polygon unit and apparatus therefor
    Patent number: 10516884
    Abstract: The present invention relates to a method for encoding/decoding a still image or a video based on a polygon unit and an apparatus for supporting the same. Particularly, a method for encoding an image based on a polygon unit may include partitioning an input image by a unit of block, determining a position of at least one point within the block, determining a position of at least one point in each side of the block, partitioning the block into at least one polygon unit using a vertex of the block, at least two points among the points determined in the side of the block, and a point determined within the block and coding the input image by a unit of the polygon unit.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: December 24, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Jin Heo, Eunyong Son, Moonmo Koo, Sehoon Yea
  • Method and device for processing video signal by using separable graph-based transform
    Patent number: 10499061
    Abstract: The present invention provides a method for decoding a video signal by using a graph-based transform, comprising the steps of: parsing a transform index from the video signal; generating a line graph on the basis of edge information on a target unit; aligning transform vectors for each of segments of the line graph on the basis of a transform type corresponding to the transform index; acquiring a transform kernel by realigning the transform vectors for each of segments of the line graph according to a predetermined condition; and performing an inverse transform for the target unit on the basis of the transform kernel.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: December 3, 2019
    Assignee: LG Electronics Inc.
    Inventors: Moonmo Koo, Bumshik Lee, Sehoon Yea, Kyuwoon Kim
  • Method for encoding and decoding a media signal and apparatus using the same
    Patent number: 10469874
    Abstract: Disclosed herein is a method of encoding a video signal, comprising receiving an original video signal; comparing the original video signal with available reconstructed signals; determining a correction signal based on a result of the comparison; and generating a transform-coded correction signal to be transmitted for a signal reconstruction.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: November 5, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Onur Gonen Guleryuz, Amir Said, Sehoon Yea
  • Method and apparatus for processing video signal using graph-based transformation based on prediction angle
    Patent number: 10469838
    Abstract: A method of encoding a video signal using a graph-based transformation includes: generating a residual block using a prediction block generated according to an intra prediction mode; obtaining at least one of a self-loop weight indicating a weight of boundary pixels in the residual block or a correlation coefficient indicating an inter-pixel correlation, on the basis of a prediction angle corresponding to the intra prediction mode; generating a graph on the basis of at least one of the self-loop weight or the correlation coefficient; determining a graph-based transformation kernel on the basis of the graph; and performing a transform for the residual block using the graph-based transformation kernel.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: November 5, 2019
    Assignee: LG Electronics Inc.
    Inventors: Bumshik Lee, Sehoon Yea, Moonmo Koo
  • Method and device for processing camera parameter in 3D video coding
    Patent number: 10419779
    Abstract: The present invention relates to a device and a method for coding a 3D video, a decoding method, according to the present invention, comprising the steps of: receiving, through a first syntax, a camera parameter for switching a depth value into a disparity value; determining whether the camera parameter which applies to a previous slice or picture applies to a current slice or picture; and if the camera parameter applies to a current slice or picture, deriving a disparity value of a current block on the basis of the camera parameter. According to the present invention, slices or pictures of a certain interval may share the same camera parameter, the transmission of overlapping information may be prevented, and coding efficiency may be improved.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: September 17, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunmi Yoo, Junghak Nam, Sehoon Yea
  • Method and device for encoding/decoding 3D video
    Patent number: 10397611
    Abstract: The present invention relates to a device and a method for coding a 3D video, a decoding method, according to the present invention, comprising the steps of: receiving a single depth mode (SDM) flag information indicating whether the SDM is applied to a current block; and if the SDM is applied to the current block, generating a prediction sample on the basis of a first candidate and a second candidate derived by using spatial neighboring reference samples of the current block, wherein the number of the spatial neighboring reference samples is two, and among the neighboring reference samples, the first neighboring reference sample is positioned on the left side of the current block, and the second neighboring reference sample is positioned on the upper side of the current block.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: August 27, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Sunmi Yoo, Jungdong Seo, Junghak Nam, Sehoon Yea