公开(公告)号：US20220101561A1

公开(公告)日：2022-03-31

申请号：US17546578

申请日：2021-12-09

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Arash Vosoughi ,  Shan Liu

IPC: G06T9/00 ,  H04N19/85 ,  H04N19/61

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.

公开(公告)号：US20210358091A1

公开(公告)日：2021-11-18

申请号：US17444030

申请日：2021-07-29

Applicant: TENCENT AMERICA LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: G06T5/00 ,  H04N19/59 ,  G06T5/30 ,  H04N19/182

Abstract: A method of video decoding performed in a video decoder includes receiving compressed geometric data corresponding to a three dimensional (3D) space. The method further includes generating a resolution occupancy map. The method further includes reconstructing a point cloud using the compressed geometric data and the resolution occupancy map. The method further includes performing a smoothing operation on one of the (i) reconstructed point cloud and (ii) the generated resolution occupancy map.

公开(公告)号：US20210329270A1

公开(公告)日：2021-10-21

申请号：US17211536

申请日：2021-03-24

Applicant: Tencent America LLC

Inventor： Sehoon YEA ,  Wen GAO ,  Shan LIU

IPC: H04N19/186 ,  H04N19/184 ,  H04N19/44 ,  H04N19/172 ,  H04N19/174

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.

公开(公告)号：US20210012535A1

公开(公告)日：2021-01-14

申请号：US16924790

申请日：2020-07-09

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: G06T9/00 ,  H04N19/61 ,  H04N19/85

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.

公开(公告)号：US20210006765A1

公开(公告)日：2021-01-07

申请号：US16917107

申请日：2020-06-30

Applicant: TENCENT AMERICA LLC

Inventor： Sehoon YEA ,  Arash VOSOUGHI ,  Shan LIU

IPC: H04N13/161 ,  H04N19/597 ,  G06T9/00 ,  H04N19/85 ,  H04N19/176

Abstract: A method of interframe point cloud attribute decoding of video data is performed by at least one processor and includes: obtaining a first reconstructed residual; obtaining a quantization index of a second reconstructed residual; obtaining the second reconstructed residual, based on the obtained quantization index of the second reconstructed residual and the obtained first reconstructed residual; and obtaining a color attribute of a point of a point cloud by decoding the obtained second reconstructed residual or decoding a transform residual based on the obtained second reconstructed residual.

公开(公告)号：US20200296394A1

公开(公告)日：2020-09-17

申请号：US16814350

申请日：2020-03-10

Applicant: TENCENT AMERICA LLC

Inventor： Byeongdoo CHOI ,  Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: H04N19/44 ,  H04N19/119 ,  H04N19/30 ,  H04N19/172

Abstract: Systems and methods for decoding a video stream, a method includes receiving video stream, the video stream including: a frame of a plurality of two-dimensional (2D) pictures that are layers of the frame, each of the plurality of 2D pictures having a respective attribute of a same three-dimensional (3D) representation, frame partition information that indicates the frame is partitioned into a plurality of sub-frames, each of the plurality of sub-frames being a respective combination of a sub-region of each picture of the plurality of 2D pictures, and 3D bounding box information that specifies a 3D position corresponding to a sub-frame of the plurality of sub-frames; the method further includes identifying the sub-frame using the frame partition information; and decoding the sub-frame identified.

公开(公告)号：US20240007680A1

公开(公告)日：2024-01-04

申请号：US18368791

申请日：2023-09-15

Applicant: TENCENT AMERICA LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU ,  Byeongdoo CHOI ,  Stephan WENGER

IPC: H04N19/91 ,  H04N19/167 ,  H04N19/119 ,  H04N19/172

CPC classification number: H04N19/91 ,  H04N19/167 ,  H04N19/119 ,  H04N19/172

Abstract: A method of dynamic point cloud partition packing is by at least one processor and includes obtaining one or more region of interest (ROI) patches from an ROI of a point cloud, and attempting to pack, into one among tiles of a tile map, one among the obtained one or more ROI patches, in a tile scan order. The method further includes identifying whether the one among the one or more ROI patches is packed successfully into the one among the tiles, and based on the one among the one or more ROI patches being determined to be not packed successfully into the one among the tiles, chunking the one among the one or more ROI patches into multiple ROI patches.

公开(公告)号：US20220303579A1

公开(公告)日：2022-09-22

申请号：US17832358

申请日：2022-06-03

Applicant: Tencent America LLC

Inventor： Xiang ZHANG ,  Wen GAO ,  Sehoon YEA ,  Shan LIU

IPC: H04N19/597 ,  H04N19/169 ,  H04N19/174

Abstract: A method of point cloud geometry encoding includes receiving a slice of a point cloud frame for encoding, and constructing 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. The constructing includes determining a value of a partitionSkip variable specifying a partition type and a partition direction of the current node of the octree.

公开(公告)号：US20220292639A1

公开(公告)日：2022-09-15

申请号：US17828735

申请日：2022-05-31

Applicant: Tencent America LLC

Inventor： Sehoon YEA ,  Stephan WENGER ,  Shan LIU

IPC: G06T3/40 ,  G06T9/40 ,  G06K9/62 ,  G06T17/00

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.

公开(公告)号：US20220070430A1

公开(公告)日：2022-03-03

申请号：US17500507

申请日：2021-10-13

Applicant: Tencent America LLC

Inventor： Arash VOSOUGHI ,  Sehoon YEA ,  Shan LIU

IPC: H04N13/161 ,  H04N19/54

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.