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公开(公告)号：US20230396765A1
公开(公告)日：2023-12-07
申请号：US18451131
申请日：2023-08-17
发明人： Han Gao , Jianle Chen , Semih Esenlik , Anand Meher Kotra , Biao Wang
IPC分类号： H04N19/122 , H04N19/159 , H04N19/176 , H04N19/196 , H04N19/61 , H04N19/625 , G06T9/00 , G06T9/40
CPC分类号： H04N19/122 , H04N19/159 , H04N19/176 , H04N19/196 , H04N19/61 , H04N19/625 , G06T9/007 , G06T9/40
摘要： A method of video coding a block of a picture includes: obtaining a residual signal resulting from inter- or intra-picture prediction; inferring use of a DCT2 transform core for a sequence of the residual signal; processing the transformation of the block using the inferred transform core.
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公开(公告)号：US20230386092A1
公开(公告)日：2023-11-30
申请号：US18233059
申请日：2023-08-11
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：US11798199B2
公开(公告)日：2023-10-24
申请号：US17023902
申请日：2020-09-17
发明人： Jae Jun Yoo , In Sung Jang
CPC分类号： G06T9/40 , G06T17/005 , H04N19/96
摘要： Disclosed are an apparatus and method for configuring spatial information required to visualize a space represented based on a hierarchical structure having a plurality of levels each of which includes one or more tiles, configuring spatial information. The method includes checking tile visibility of each level according to whether a tile exists in the corresponding level; grouping one or more levels in which tile visibility is consistently maintained into one or more groups; and assigning a tile visibility index to each group.
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公开(公告)号：US11790563B2
公开(公告)日：2023-10-17
申请号：US17563391
申请日：2021-12-28
发明人： Wei Zhang , Fuzheng Yang , Shuai Wan , Yanzhuo Ma , Junyan Huo , Zexing Sun , Sujun Zhang
CPC分类号： G06T9/001 , G06T7/11 , G06T9/40 , G06T17/00 , G06T2207/10028
摘要： A point cloud model reconstruction method, an encoder, and a decoder are provided. The method includes the following. An i-th segmentation position of an i-th three-dimensional slice on a longest edge in a point cloud space is obtained, where 1≤i≤n−1 and n is a total number of three-dimensional slices to-be-processed. An i-th cube block set nearest to the i-th segmentation position in the i-th three-dimensional slice is determined based on the i-th segmentation position and a preset cube block length. An i-th vertex position with a cube block in the i-th cube block set is determined along the longest edge, where the i-th vertex position represents a position of a vertex on an edge which is away from a start position of the cube block by the preset cube block length. A point cloud model is reconstructed based on the i-th vertex position.
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公开(公告)号：US20230326090A1
公开(公告)日：2023-10-12
申请号：US18335714
申请日：2023-06-15
发明人： Hui YUAN , Lu WANG , Xiaohui WANG , Qi LIU
CPC分类号： G06T9/40 , G06T2210/36 , G06T17/00
摘要： A point cloud decoding method, a point cloud encoding method, and a decoder are provided in implementation of the disclosure. The decoding method includes the following. A bitstream of a point cloud is parsed to obtain an initial reconstructed value of attribute information of a target point in the point cloud. The initial reconstructed value is converted into an initial luma value and an initial chroma value. A final chroma value is obtained by filtering the initial chroma value with a Kalman filtering algorithm. A final reconstructed value of the attribute information of the target point is obtained based on the final chroma value and the initial luma value. A decoded point cloud is obtained according to the final reconstructed value of the attribute information of the target point.
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公开(公告)号：US20230316586A1
公开(公告)日：2023-10-05
申请号：US18329927
申请日：2023-06-06
发明人： Shuai WAN , Zhecheng WANG
摘要： A point cloud coding method is provided. The method includes the following. Occupancy bit information of neighbouring nodes of a current node is obtained. A context model is determined according to the occupancy bit information of the neighbouring nodes. Related information of the current node is entropy encoded with the context model and signalled into a bitstream, where the related information includes at least one of flag information of a single child node or coordinate information of the single child node.
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公开(公告)号：US11776165B2
公开(公告)日：2023-10-03
申请号：US17228042
申请日：2021-04-12
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：US11756235B2
公开(公告)日：2023-09-12
申请号：US17896433
申请日：2022-08-26
发明人： Toshiyasu Sugio , Noritaka Iguchi
摘要： A three-dimensional data encoding method includes: obtaining third point cloud data that is a combination of first point cloud data and second point cloud data, and includes geometry information of each of three-dimensional points included in the third point cloud data, and identification information indicating which of the first point cloud data and the second point cloud data each of the three-dimensional points belongs to; and generating encoded data by encoding the third point cloud data obtained. In the generating, identification information of each of the three-dimensional points is encoded as attribute information.
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公开(公告)号：US20230267650A1
公开(公告)日：2023-08-24
申请号：US17676706
申请日：2022-02-21
摘要： The present concepts relate to lossless data compression techniques for reducing the size of a data structure. Certain data in the data structure that can be either recovered from another source or rebuilt from other available information may be removed from the data structure. To further reduce data size, the retained data in the data structure may be packed into a smaller-bit encoding data type. Additionally, to reduce the data size even more, the packed data may be zipped using a lossless data compression algorithm. To regain the original data structure, the process may be reversed. The zipped data may be unzipped using a lossless data decompression algorithm. The packed data may be unpacked into the original bit-sized data encoding. The removed data may be restored by either recovering it from another source or rebuilding it from other available information.
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公开(公告)号：US20230260163A1
公开(公告)日：2023-08-17
申请号：US18015835
申请日：2021-07-13
申请人： LG ELECTRONICS INC.
发明人： Sooyeon LEE , Sejin OH , Yousun PARK
CPC分类号： G06T9/40 , G06T17/00 , G06T2210/56
摘要： A point cloud data transmission method according to embodiments may comprise the steps of: acquiring point cloud data; encoding geometry information including the positions of points of the point cloud data; encoding, on the basis of the geometry information, attribute information including attribute values of the points of the point cloud data; and transmitting the encoded geometry information, the encoded attribute information, and signaling information.
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