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公开(公告)号：US20240331208A1
公开(公告)日：2024-10-03
申请号：US18732970
申请日：2024-06-04
发明人： Toshiyasu SUGIO , Noritaka IGUCHI , Chi WANG , Pongsak LASANG , Chung Dean HAN
IPC分类号： G06T9/40
CPC分类号： G06T9/40
摘要： A three-dimensional data encoding method includes: encoding first information of a first current node or second information of a second current node, the first current node being included in an N-ary tree structure of first three-dimensional points included in a first three-dimensional point cloud, N being 2 or 4, the second current node being included in an octree structure of second three-dimensional points included in a second three-dimensional point cloud The encoding of the first information or the second information includes encoding the first information using a first encoding pattern including a pattern common to a second encoding pattern used in encoding the second information.
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公开(公告)号：US20240282014A1
公开(公告)日：2024-08-22
申请号：US18637212
申请日：2024-04-16
摘要： Methods and apparatuses are provided for entropy encoding and decoding data of a three-dimensional point cloud, which includes for a current node in an N-ary tree-structure representing the three-dimensional point cloud, extracting features of a set of the neighboring nodes of the current node by applying a neural network including an attention layer. Probabilities of information associated with the current node is estimated based on the extracted features. The information associated with the current node is entropy encoded based on the estimated probabilities.
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公开(公告)号：US12069316B2
公开(公告)日：2024-08-20
申请号：US17441146
申请日：2020-03-20
申请人： LG ELECTRONICS INC.
发明人： Hyunmook Oh , Sejin Oh
CPC分类号： H04N19/96 , G06T9/40 , G06T15/005 , H04N19/91 , G06T2210/56
摘要： A point cloud data transmission method according to embodiments comprises the steps of: acquiring point cloud data; encoding geometry information included in the point cloud data; encoding attribute information included in the point cloud data; and transmitting the encoded geometry information and the encoded attribute information.
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公开(公告)号：US12058370B2
公开(公告)日：2024-08-06
申请号：US17634130
申请日：2020-03-26
申请人： LG Electronics Inc.
发明人： Yousun Park , Sejin Oh
IPC分类号： H04N19/597 , G06T9/40 , H04N19/119 , H04N19/167 , H04N19/169
CPC分类号： H04N19/597 , G06T9/40 , H04N19/119 , H04N19/167 , H04N19/1883
摘要： A point cloud data transmission device according to embodiments may comprise: an acquisition unit for acquiring point cloud data; an encoder for encoding the acquired point cloud data; and a transmitter for transmitting a bitstream including the encoded point cloud data. A point cloud data reception device according to embodiments may comprise: a receiver for receiving a bitstream including point cloud data; a decoder for decoding the point cloud data; and a renderer for rendering the point cloud data.
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公开(公告)号：US12046009B2
公开(公告)日：2024-07-23
申请号：US18590993
申请日：2024-02-29
发明人： Wenrui Dai , Xin Li , Shaohui Li , Chenglin Li , Junni Zou , Hongkai Xiong
摘要： A graph dictionary learning method for a 3D point cloud comprises: obtaining N point clouds to form training dataset; performing voxelization process on the point cloud data to obtain voxelized point cloud data of the training dataset; performing voxel block division on the point cloud data of the training dataset, selecting a plurality of voxel blocks as the training dataset, and constructing a graph dictionary learning model according to the training dataset; and performing iterative optimization on the graph dictionary learning objective function to obtain a graph dictionary for encoding and decoding a 3D point cloud signal. The present disclosure effectively uses the spatial correlation between point cloud signals to near-optimally remove the redundancy among point cloud signals.
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公开(公告)号：US20240221234A1
公开(公告)日：2024-07-04
申请号：US18609006
申请日：2024-03-19
申请人： BlackBerry Limited
IPC分类号： G06T9/40 , H04N19/184 , H04N19/52
CPC分类号： G06T9/40 , H04N19/184 , H04N19/52
摘要： Methods and devices for encoding a point cloud. More than one frame of reference is identified and a transform defines the relative motion of a second frame of reference to a first frame of reference. The space is segmented into regions and each region is associated with one of the frames of reference. Local motion vectors within a region are expressed relative to the frame of reference associated with that region. Occupancy of the bitstream is entropy encoded based on predictions determined using the location motion vectors and the transform associated with the attached frame of reference.
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公开(公告)号：US20240212219A1
公开(公告)日：2024-06-27
申请号：US18594466
申请日：2024-03-04
申请人： KDDI CORPORATION
发明人： Kouhei MATSUZAKI , Kei KAWAMURA , Kyohei UNNO
摘要： A point cloud decoding device (200) according to the present invention including a circuit, wherein the circuit: stores occupancy information of a child hierarchical node indicating whether or not the child hierarchical node is occupied; and predicts occupancy information of a child node indicating whether or not the child node is occupied using the occupancy information of the child hierarchical node.
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公开(公告)号：US12020461B2
公开(公告)日：2024-06-25
申请号：US17446263
申请日：2021-08-27
申请人： TENCENT AMERICA LLC
发明人： Wen Gao , Xiang Zhang , Shan Liu
CPC分类号： G06T9/40 , H04N19/60 , G06T2210/56
摘要： In a method of point cloud attribute decoding in a point cloud decoder, a sorting method of a set of points of a point is determined. A quantization parameter for quantizing transform coefficients of a Haar-based attribute coding of the point cloud is determined based on first signaling information in a coded bitstream of the point cloud. The Haar-based attribute coding is configured to perform point cloud compression on the set of points of the point cloud based on a Haar transform. An entropy decoding method for decoding the quantized transform coefficients is determined according to the quantization parameter that is determined based on the first signaling information. The quantized transform coefficients are further determined based on the entropy decoding method. Attributes of the point cloud are reconstructed based on the determined sorting method and the determined quantized transform coefficients.
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公开(公告)号：US11991348B2
公开(公告)日：2024-05-21
申请号：US17620412
申请日：2020-06-11
发明人： Koji Yano , Hiroyuki Yasuda , Tsuyoshi Kato , Satoru Kuma , Ohji Nakagami
IPC分类号： H04N19/103 , G06T9/40 , H04N19/124 , H04N19/96
CPC分类号： H04N19/103 , G06T9/40 , H04N19/124 , H04N19/96
摘要： The present disclosure relates to an information processing device and a method capable of suppressing a reduction in encoding efficiency of point cloud data. As for a point cloud representing an object having a three-dimensional shape as a point group, position information of a point to be processed is predicted on the basis of position information of a reference point, position information of a prediction point is generated, a difference between the generated position information of the prediction point and the position information of the point to be processed is derived, the derived difference is encoded, and a bitstream is generated. The present disclosure may be applied to, for example, an information processing device, an electronic device, an information processing method, a program or the like.
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公开(公告)号：US11989921B2
公开(公告)日：2024-05-21
申请号：US17091251
申请日：2020-11-06
发明人： Chung Dean Han , Pongsak Lasang , Chi Wang , Toshiyasu Sugio
摘要： A three-dimensional data encoding method includes generating a bitstream by encoding subspaces included in a current space including three-dimensional points. In the generating of the bitstream: first information is stored in a first header which is common to the subspaces and included in the bitstream, the first information indicating first coordinates which are coordinates of the current space; and second information is stored in a second header which is provided on a subspace basis and included in the bitstream, the second information indicating a difference between second coordinates which are coordinates of a corresponding subspace among the subspaces and the first coordinates.
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