公开(公告)号：US20230048381A1

公开(公告)日：2023-02-16

申请号：US17784388

申请日：2020-01-07

申请人： BlackBerry Limited

发明人： Jonathan TAQUET ,  Sébastien LASSERRE

IPC分类号： G06T9/40

摘要： A method of encoding point cloud data using a planar coding mode is disclosed. The planar coding mode may be signaled using a planar mode flag to signal that a current volume is planar. A volume is planar if all of its occupied child nodes are on one side of a plane bisecting the volume. A planar position flag may signal which side of the volume is occupied. Volume data for already-coded occupied volumes of the point cloud is tracked using a data structure stored in memory. Entropy coding may be used to code the planar mode flag and/or the planar position flag. Context determination for coding may take into account a distance between the volume and a closest already-coded occupied volume among those tracked already-coded occupied volumes that have a same index in the data structure as the current volume.

公开(公告)号：US11568514B2

公开(公告)日：2023-01-31

申请号：US17493353

申请日：2021-10-04

申请人： LG ELECTRONICS INC.

发明人： Hyejung Hur ,  Sejin Oh

IPC分类号： G06T3/40 ,  G06K9/62 ,  G06T17/20 ,  G06T9/40

摘要： Disclosed herein is a method of transmitting point cloud data. The method may include acquiring point cloud data, encoding geometry information including positions of points in the point cloud data, encoding attribute information including attribute values of points in the point cloud data based on the geometry information, and transmitting the encoded geometry information, the encoded attribute information and signaling information.

公开(公告)号：US11558610B2

公开(公告)日：2023-01-17

申请号：US17150296

申请日：2021-01-15

申请人： Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

发明人： Li Zhang ,  Kai Zhang ,  Hongbin Liu ,  Yue Wang

IPC分类号： H04N7/12 ,  H04N19/117 ,  H04N19/124 ,  H04N19/176 ,  H04N19/184 ,  H04N19/80 ,  G06T9/40 ,  H04N19/12 ,  H04N19/635

摘要： A method for video bitstream processing includes determining, by a processor, that a reconstructed representation of a current sample of video data is to be subject to a bilateral filter defined by one or more parameters based, at least in part, on a weighted sum of sample intensity differences (SDiff values) between a first window covering the current sample and a second window covering neighboring samples, wherein multiple sample intensity differences are assigned a same parameter from the one or more parameters; and applying the bilateral filter defined by the one or more parameters to the reconstructed representation of the current sample of the video data.

公开(公告)号：US20230005190A1

公开(公告)日：2023-01-05

申请号：US17941190

申请日：2022-09-09

申请人： Panasonic Intellectual Property Corporation of America

发明人： Toshiyasu SUGIO ,  Noritaka IGUCHI

IPC分类号： G06T9/00 ,  G06T9/40

摘要： A three-dimensional data encoding method includes: adding a first information item to a bitstream, the first information item indicating whether a duplicated point is available, the duplicated point representing, using a single node, position information items of two or more three-dimensional points having a same position information item in a prediction tree showing a reference relation in predictive encoding; and adding second information items to the bitstream when the first information item indicates that the duplicated point is available, the second information items each corresponding to a different one of nodes included in the prediction tree, and indicating a total number of one or more three-dimensional points included in the different one of the nodes.

公开(公告)号：US11539949B2

公开(公告)日：2022-12-27

申请号：US17582600

申请日：2022-01-24

申请人： Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

发明人： Zhipin Deng ,  Li Zhang ,  Kai Zhang ,  Hongbin Liu

IPC分类号： H04N7/12 ,  H04N19/119 ,  H04N19/96 ,  H04N19/107 ,  H04N19/109 ,  H04N19/11 ,  H04N19/127 ,  H04N19/132 ,  H04N19/167 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/189 ,  H04N19/169 ,  H04N19/60 ,  H04N19/61 ,  H04N19/70 ,  G06T9/40

摘要： Methods, systems, and devices for coding or decoding video wherein the picture partition mode is based on block size are described. An example method for video processing includes using a dimension of a virtual pipeline data unit (VPDU) used for a conversion between a video comprising one or more video regions comprising one or more video blocks and a bitstream representation of the video to perform a determination of whether a ternary-tree (TT) or a binary tree (BT) partitioning of a video block of the one or more video blocks is enabled, and performing, based on the determination, the conversion, wherein the dimension is equal to VSize in luma samples, wherein dimensions of the video block are CtbSizeY in luma samples, wherein VSize=min(M, CtbSizeY), and wherein M is a positive integer.

公开(公告)号：US20220392118A1

公开(公告)日：2022-12-08

申请号：US17889476

申请日：2022-08-17

申请人： BlackBerry Limited

发明人： David FLYNN ,  Sébastien LASSERRE

IPC分类号： G06T9/40 ,  G06F17/18 ,  H03M7/30 ,  H04N19/105 ,  H04N19/13 ,  H04N19/169 ,  H04N19/46 ,  H04N19/96 ,  G06T9/00 ,  G06T17/10

摘要： Methods and devices for encoding a point cloud. A current node associated with a sub-volume is split into further sub-volumes, each further sub-volume corresponding to a child node of the current node, and, at the encoder, an occupancy pattern is determined for the current node based on occupancy status of the child nodes. A probability distribution is selected from among a plurality of probability distributions based on occupancy data for a plurality of nodes neighbouring the current node. The encoder entropy encodes the occupancy pattern based on the selected probability distribution to produce encoded data for the bitstream and updates the selected probability distribution. The decoder makes the same selection based on occupancy data for neighbouring nodes and entropy decodes the bitstream to reconstruct the occupancy pattern.

公开(公告)号：US11508041B2

公开(公告)日：2022-11-22

申请号：US16753773

申请日：2018-10-03

申请人： InterDigital VC Holdings, Inc.

发明人： Kangying Cai ,  Julien Ricard ,  Celine Guede

IPC分类号： G06T5/00 ,  G06T9/40 ,  G06T19/00

摘要： The present disclosure concerns a method for reconstructing a point cloud representing a 3D object from an inverse-projected point cloud obtained by inverse-projecting at least one depth image of an original point cloud, said at least one depth image being obtained by projecting points of the original point cloud onto at least one surface, said method comprising the steps of detecting at least one missing part in the inverse-projected point cloud, and completing said at least one missing part based on points in the neighborhood of said at least one missing part.

公开(公告)号：US20220358686A1

公开(公告)日：2022-11-10

申请号：US17771354

申请日：2019-10-31

申请人： BlackBerry Limited

发明人： Sébastien Lasserre ,  Jonathan Taquet

IPC分类号： G06T9/40

摘要： A method of encoding or decoding a point cloud for representing a three-dimensional location of an object, the point cloud being generated by a device comprising a plurality of beam emitters. The method comprises using information from the beam emitter such as the angle of each beam emitter, and the azimuthal distance between each point capture, to more efficiently represent the point cloud data.

公开(公告)号：US20220358685A1

公开(公告)日：2022-11-10

申请号：US17621592

申请日：2019-06-24

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Shiori SUGIMOTO ,  Seishi TAKAMURA ,  Atsushi SHIMIZU

IPC分类号： G06T9/40 ,  G06T3/40

摘要： An image encoding method that expresses an image using pixels or blocks, and colors assigned to the pixels or the blocks when encoding an image to be encoded, and encodes a block division tree and color information, the color information being assigned to all nodes including a root node, branch nodes, and leaf nodes of the block division tree, the method includes: a division tree generation step of dividing the image to be encoded using an arbitrary division tree and thereby generating the block division tree; a color information determination step of determining representative colors that represent interim blocks or final blocks and assigning the determined colors as color information corresponding to the respective nodes, the interim blocks or the final blocks corresponding to the nodes of the block division tree; a tree encoding step of encoding the block division tree; and a color information encoding step of encoding the color information.

公开(公告)号：US20220351423A1

公开(公告)日：2022-11-03

申请号：US17765042

申请日：2020-10-01

申请人： BlackBerry Limited

发明人： Gaelle Christine MARTIN-COCHER ,  Jonathan TAQUET ,  Sébastien LASSERRE

IPC分类号： G06T9/40

摘要： Method and devices for coding point cloud data using an angular coding mode. The angular coding mode may be signaled using in an angular mode flag to signal that a volume is to be coded using the angular coding mode. The angular coding mode is applicable to planar volumes that have all of their occupied child nodes on one side of a plane bisecting the volume. A planar position flag may signal which side of the volume is occupied. Entropy coding may be used to code the planar position flag. Context determination for coding may take into account angular information for child nodes or groups of child nodes of the volume relative to a location of a beam assembly that has sampled to point cloud. Characteristics of the beam assembly may be coded into a dedicated syntax in the bitstream.