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).

  • Patent number: 11451802
    Abstract: In a method of point cloud geometry decoding in a point cloud decoder, chroma prediction residual information of a point in a set of points is received from a coded bitstream for a point cloud that includes the set of points. The chroma prediction residual information includes a Cb component and a Cr component. Further, a type of correlation between the Cb component and the Cr component of the chroma prediction residual information is determined by processing circuitry and from the coded bitstream for the point cloud. The chroma prediction residual information is decoded based on the type of the correlation between the Cb component and the Cr component of the chroma prediction residual information.
    Type: Grant
    Filed: March 24, 2021
    Date of Patent: September 20, 2022
    Assignee: Tencent America LLC
    Inventors: Sehoon Yea, Wen Gao, Shan Liu
  • Publication number: 20220292639
    Abstract: A method, apparatus, and computer-readable medium for point cloud coefficient coding are provided. The method may include receiving compressed point cloud data based on set-index values and symbol-index values; and entropy-decoding the set-index values based on the compressed point cloud data. The symbol-index values may be bypass-decoded based on the compressed point cloud data, and the set-index values and symbol-index values may be combined into transform coefficients associated with cloud point data.
    Type: Application
    Filed: May 31, 2022
    Publication date: September 15, 2022
    Applicant: Tencent America LLC
    Inventors: Sehoon YEA, Stephan WENGER, Shan LIU
  • Patent number: 11423582
    Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression and decompression. In some examples, an apparatus for point cloud compression/decompression includes processing circuitry. For example, the processing circuitry in the apparatus for point cloud encoding receives an occupancy map for a point cloud. The occupancy map is indicative of a background portion and a foreground portion for a coding block in an image that is generated based on the point cloud. Then, the processing circuitry devaluates distortions in the background portion of the coding block during an optimization process that results a coding option for the coding block, and encodes the coding block according to the coding option.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: August 23, 2022
    Assignee: Tencent America LLC
    Inventors: Arash Vosoughi, Sehoon Yea, Shan Liu
  • Patent number: 11423642
    Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression and decompression. In some examples, an apparatus for point cloud compression/decompression includes processing circuitry. For example, the apparatus is for point cloud decompression. The processing circuitry decodes prediction information of an image from a coded bitstream corresponding to a point cloud. The prediction information indicates that the image includes a plurality of missed points from at least a patch for the point cloud, and the plurality of missed points are arranged in the image according to a non-jumpy scan. Then, the processing circuitry reconstructs the plurality of missed points from the image according to the non-jumpy scan.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: August 23, 2022
    Assignee: Tencent America LLC
    Inventors: Arash Vosoughi, Sehoon Yea, Shan Liu
  • Patent number: 11405615
    Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform receiving video data in an AOMedia Video 1 (AV1) format comprising data of at least two chroma prediction-residual signal blocks, a transformation between at least one signal block, having a size less than or equal to a combination of the chroma prediction-residual signal blocks, and the chroma prediction-residual signal blocks, and decoding the video data based on an output of the transformation comprising the at least one signal block having the size less than or equal to the combination of the chroma prediction-residual blocks.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: August 2, 2022
    Assignee: TENCENT AMERICA LLC
    Inventors: Sehoon Yea, Xin Zhao, Shan Liu
  • Patent number: 11403784
    Abstract: A method of obtaining a tree-based point cloud compression (PCC) media stream using moving picture experts group (MPEG)-dynamic adaptive streaming over http (DASH), is performed by at least one processor and includes obtaining, from a server, a media representation description (MPD) comprising a PCC uniform resource indicator (URI) and a PCC three-dimensional (3D) descriptor, and determining whether the PCC URI comprised in the obtained MPD indicates that the tree-based PCC media stream is to be accessed. The method further includes, based on the PCC URI being determined to indicate that the tree-based PCC media stream is to be accessed, obtaining, from the server, the tree-based PCC media stream, using the PCC 3D descriptor comprised in the obtained MPD.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: August 2, 2022
    Assignee: TENCENT AMERICA LLC
    Inventors: Shuai Zhao, Iraj Sodagar, Shan Liu, Byeongdoo Choi, Sehoon Yea, Arash Vosoughi
  • Publication number: 20220224883
    Abstract: Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that decodes a video bitstream to obtain a reduced-resolution residual block for a current block. The processing circuitry determines that a block level flag is set to a pre-defined value. The pre-defined value indicates that the current block is coded in reduced-resolution coding. Based on the block level flag, the processing circuitry generates a reduced-resolution prediction block for the current block by down-sampling a full-resolution reference block of the current block. The processing circuitry generates a reduced-resolution reconstruction block for the current block based on the reduced-resolution prediction block and the reduced-resolution residual block. The processing circuitry generates a full-resolution reconstruction block for the current block by up-sampling the reduced-resolution reconstruction block.
    Type: Application
    Filed: September 28, 2021
    Publication date: July 14, 2022
    Applicant: TENCENT AMERICA LLC
    Inventors: Sehoon YEA, Xin ZHAO, Shan LIU
  • Patent number: 11381840
    Abstract: A method of point cloud geometry decoding in a point cloud decoder can include receiving a bitstream including a slice of a coded point cloud frame, and reconstructing an octree representing a geometry of points in a bounding box of the slice where a current node of the octree is partitioned with a quadtree (QT) partition or a binary tree (BT) partition.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: July 5, 2022
    Assignee: TENCENT AMERICA LLC
    Inventors: Xiang Zhang, Wen Gao, Sehoon Yea, Shan Liu
  • Patent number: 11373276
    Abstract: A method, apparatus, and computer-readable medium for point cloud coefficient coding are provided. Transform coefficients associated with point cloud data are decomposed into set-index values and symbol-index values, the symbol index-value specifying location of the transform coefficient within a set. The decomposed transform coefficients are partitioned into one or more sets based on the set-index values and the symbol-index values. The set-index values of the partitioned transform coefficients are entropy-coded, and the symbol-index values of the partitioned transform coefficients are bypass-coded. The point cloud data is compressed based on the entropy-coded symbol-index values and the bypass-coded set-index values.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: June 28, 2022
    Assignee: TENCENT AMERICA LLC
    Inventors: Sehoon Yea, Stephan Wenger, Shan Liu
  • Publication number: 20220201307
    Abstract: Aspects of the disclosure provide methods and apparatuses for video encoding and decoding. Processing circuitry of an apparatus for video decoding decodes coded information for one or more blocks from a coded video bitstream. The coded information indicates whether to apply a super resolution coding mode to the one or more blocks. The super resolution coding mode is applied in response to the one or more blocks having been down sampled from a high spatial resolution to a low spatial resolution lower than the high spatial resolution by an encoder. Based on the coded information indicating that the super resolution coding mode is applied to the one or more blocks, the processing circuitry can generate, using the super resolution coding mode, a reconstructed block having the high spatial resolution by upsampling information of a first block having the low spatial resolution in the one or more blocks including transform coefficients.
    Type: Application
    Filed: September 22, 2021
    Publication date: June 23, 2022
    Applicant: Tencent America LLC
    Inventors: Sehoon YEA, Madhu Peringassery KRISHNAN, Xin ZHAO, Shan LIU
  • Publication number: 20220167016
    Abstract: A method of point cloud geometry decoding in a point cloud decoder can include receiving a bitstream including a slice of a coded point cloud frame, and reconstructing an octree representing a geometry of points in a bounding box of the slice where a current node of the octree is partitioned with a quadtree (QT) partition or a binary tree (BT) partition.
    Type: Application
    Filed: February 10, 2022
    Publication date: May 26, 2022
    Applicant: TENCENT AMERICA LLC
    Inventors: Xiang ZHANG, Wen GAO, Sehoon YEA, Shan LIU
  • Publication number: 20220148132
    Abstract: A method, apparatus, and computer-readable medium for point cloud coefficient coding are provided. Transform coefficients associated with point cloud data are decomposed into set-index values and symbol-index values, the symbol index-value specifying location of the transform coefficient within a set. The decomposed transform coefficients are partitioned into one or more sets based on the set-index values and the symbol-index values. The set-index values of the partitioned transform coefficients are entropy-coded, and the symbol-index values of the partitioned transform coefficients are bypass-coded. The point cloud data is compressed based on the entropy-coded symbol-index values and the bypass-coded set-index values.
    Type: Application
    Filed: January 27, 2022
    Publication date: May 12, 2022
    Applicant: TENCENT AMERICA LLC
    Inventors: Sehoon YEA, Stephan Wenger, Shan Liu
  • Publication number: 20220116635
    Abstract: Aspects of the disclosure include methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that determines directionality information of a restoration filter unit included in a video frame based on at least one of a constrained directional enhancement filter (CDEF) process or an intra prediction mode. The processing circuitry determines one of a plurality of sets of filter parameters of a restoration filter process based on the directionality information of the restoration filter unit. The processing circuitry performs the restoration filter process on the restoration filter unit based on the one of the plurality of sets of filter parameters. The processing circuitry reconstructs the video frame based on the filtered restoration filter unit.
    Type: Application
    Filed: June 29, 2021
    Publication date: April 14, 2022
    Applicant: TENCENT AMERICA LLC
    Inventors: Sehoon YEA, Yixin DU, Xin ZHAO, Shan LIU
  • Publication number: 20220101561
    Abstract: A method of interframe point cloud attribute coding is performed by at least one processor and includes coding a first color attribute of a point of a point cloud to obtain a first reconstructed residual, coding a second color attribute of the point to obtain a second reconstructed residual, and determining a quantization index of the second reconstructed residual, based on the first reconstructed residual and the second reconstructed residual. The method further includes updating the second reconstructed residual, based on the quantization index and the first reconstructed residual.
    Type: Application
    Filed: December 9, 2021
    Publication date: March 31, 2022
    Applicant: TENCENT AMERICA LLC
    Inventors: Sehoon YEA, Arash Vosoughi, Shan Liu
  • Patent number: 11284111
    Abstract: A method of point cloud attribute coding performed by at least one processor, including obtaining an encoded bitstream corresponding to a point cloud; determining whether the encoded bitstream was encoded using an inter-channel tool for inter-channel decorrelation; based on determining that the encoded bitstream was encoded using the inter-channel tool, decoding the encoded bitstream using the inter-channel tool to reconstruct an attribute signal corresponding to the point cloud; and reconstructing the point cloud using the reconstructed attribute signal.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: March 22, 2022
    Assignee: TENCENT AMERICA LLC
    Inventors: Sehoon Yea, Stephan Wenger, Shan Liu
  • Patent number: 11272158
    Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression and decompression. In some examples, an apparatus for point cloud compression/decompression includes processing circuitry. In some embodiments, the processing circuitry decodes prediction information of a point cloud from a coded bitstream and reconstructs a geometry reconstructed cloud according to a geometry image of the point cloud that is decoded from the coded bitstream. Further, the processing circuitry applies a filter to at least a geometry sample inside a patch of the geometry reconstructed cloud in addition to boundary samples of the patch to generate a smoothed geometry reconstructed cloud, and reconstructs points of the point cloud based on the smoothed geometry reconstructed cloud.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: March 8, 2022
    Assignee: Tencent America LLC
    Inventors: Arash Vosoughi, Sehoon Yea, Shan Liu
  • Publication number: 20220070430
    Abstract: Aspects of the disclosure provide methods and apparatuses for point cloud compression and decompression. In some examples, an apparatus for point cloud compression/decompression includes processing circuitry. In some embodiments, the processing circuitry decodes prediction information of a point cloud from a coded bitstream and reconstructs a geometry reconstructed cloud according to a geometry image of the point cloud that is decoded from the coded bitstream. Further, the processing circuitry applies a filter to at least a geometry sample inside a patch of the geometry reconstructed cloud in addition to boundary samples of the patch to generate a smoothed geometry reconstructed cloud, and reconstructs points of the point cloud based on the smoothed geometry reconstructed cloud.
    Type: Application
    Filed: October 13, 2021
    Publication date: March 3, 2022
    Applicant: Tencent America LLC
    Inventors: Arash VOSOUGHI, Sehoon YEA, Shan LIU
  • Publication number: 20220070492
    Abstract: There is included a method and apparatus comprising computer code configured to cause a processor or processors to perform obtaining a leaf node of geometry based point cloud compression (G-PCC) data, splitting the leaf node into a plurality of cuboids, deriving separate triangle soups for each of the cuboids, and coding a plurality of flags respectively for each of the edges of each of the cuboids, where the plurality of flags indicate whether vertices of the separate triangle soups are present on ones of the edges.
    Type: Application
    Filed: September 9, 2021
    Publication date: March 3, 2022
    Applicant: TENCENT AMERICA LLC
    Inventors: Arash VOSOUGHI, Sehoon Yea, Stephan Wenger, Shan Liu
  • Patent number: 11265528
    Abstract: Systems and methods for decoding a video stream by at least one processor, a method includes receiving the video stream, the video stream including at least one cell; and reconstructing a cell from among the at least one cell. The reconstructing includes: obtaining a maximum difference value for each of at least one set of attribute values of the cell; and determining whether to apply a filter to the cell based on the maximum difference value of a set of attribute values of the at least one set of attribute values.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: March 1, 2022
    Assignee: TENCENT AMERICA LLC
    Inventors: Sehoon Yea, Arash Vosoughi, Stephan Wenger, Shan Liu
  • Patent number: 11250594
    Abstract: Methods and apparatuses of decoding a video stream encoded using video point cloud coding include obtaining a geometry-reconstructed point cloud; dividing the geometry-reconstructed point cloud into a plurality of cells, wherein a cell of the plurality of cells includes a first plurality of points; determining a plane representing the first plurality of points; generating a second plurality of points by projecting the first plurality of points onto the plane; obtaining a smoothed geometry-reconstructed point cloud based on the second plurality of points; and reconstructing a dynamic point cloud using the smoothed geometry-reconstructed point cloud.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: February 15, 2022
    Assignee: TENCENT AMERICA LLC
    Inventors: Arash Vosoughi, Sehoon Yea, Shan Liu