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公开(公告)号：EP4407959A1
公开(公告)日：2024-07-31
申请号：EP22897665.0
申请日：2022-11-16
发明人： TU, Chenxi , CAI, Kangying , CAO, Xiaoran
IPC分类号： H04L69/04 , H04L69/164 , H04N19/93 , H04N19/91 , G01S17/931 , G01S17/08
摘要： This application provides a method for compressing lidar data and an apparatus. The method for compressing lidar data includes: obtaining to-be-compressed data, where the to-be-compressed data is measurement data collected by lidar through N transmissions, and N ≥ 1; when the to-be-compressed data includes corresponding distance measurement data and signal intensity measurement data, compressing the distance measurement data to obtain a first bitstream; and predicting the signal intensity measurement data based on the distance measurement data to obtain a second bitstream. In this application, an amount of the to-be-compressed data can be greatly reduced. In particular, a larger quantity of 0 values indicates higher compression efficiency. This reduces occupied bitstreams.
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2.发明公开
公开(公告)号：EP4343574A1
公开(公告)日：2024-03-27
申请号：EP21943599.7
申请日：2021-06-04
发明人： CAI, Kangying , TU, Chenxi , CAO, Xiaoran , WANG, Pei
IPC分类号： G06F16/29
摘要： Methods and apparatuses for compressing and decompressing a 3D map are provided, to reduce a data amount of the 3D map, and this application relates to the field of 3D map technologies. The method for compressing a 3D map includes: obtaining a plurality of 3D map point spatial locations and a plurality of 3D map point descriptors (S101); determining a correspondence between the plurality of 3D map point spatial locations and the plurality of 3D map point descriptors, where the correspondence represents that a 3D map point spatial location and a 3D map point descriptor correspond to a same 3D map point (S102); and performing compression processing on the plurality of 3D map point spatial locations and the plurality of 3D map point descriptors based on the correspondence, or performing compression processing on the plurality of 3D map point spatial locations, the plurality of 3D map point descriptors, and the correspondence, to obtain compressed data of a plurality of 3D map points (S103). In this method, storage space used for storing the 3D map can be reduced, or transmission resources used for transmitting the 3D map can be reduced.
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公开(公告)号：EP4388451A1
公开(公告)日：2024-06-26
申请号：EP21811534.3
申请日：2021-10-19
CPC分类号： G06N3/09 , G06N3/0495 , G06N3/0442 , G06N3/0464 , G06N3/045
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公开(公告)号：EP4344200A1
公开(公告)日：2024-03-27
申请号：EP21943597.1
申请日：2021-06-04
发明人： TU, Chenxi , CAI, Kangying , CAO, Xiaoran , WANG, Pei
摘要： This application provides a 3D map encoding and decoding method and apparatus. The 3D map encoding method in this application includes: predicting a spatial location of a current 3D map point based on a spatial location of a reference 3D map point to obtain residual data of the spatial location of the current 3D map point, where the current 3D map point and the reference 3D map point belong to a 3D map, the reference 3D map point is a 3D map point that has been encoded before the current 3D map point is encoded, the 3D map includes a plurality of 3D map points, and the 3D map point includes a spatial location; and encoding the residual data of the spatial location of the current 3D map point to obtain a bitstream. In this application, a data amount of the 3D map can be reduced, so that transmission bandwidth is reduced, and transmission efficiency is improved.
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5.发明公开
公开(公告)号：EP4336779A1
公开(公告)日：2024-03-13
申请号：EP22815272.4
申请日：2022-05-31
发明人： CAO, Xiaoran , WANG, Pei , CAI, Kangying , TU, Chenxi
摘要： Embodiments of this application relate to 3D map compression technologies and disclose a 3D map compression method and apparatus, and a 3D map decompression method and apparatus. The compression method includes: performing compaction processing on a to-be-encoded descriptor to obtain a first compact representation of the to-be-encoded descriptor, where the to-be-encoded descriptor corresponds to at least one 3D map point on a 3D map; obtaining a compact representation of at least one reference descriptor corresponding to the to-be-encoded descriptor; obtaining a second compact representation of the to-be-encoded descriptor based on the first compact representation of the to-be-encoded descriptor and the compact representation of the at least one reference descriptor; and encapsulating the second compact representation to obtain a bitstream of the 3D map. According to embodiments of this application, 3D map transmission overheads or 3D map storage overheads can be reduced.
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公开(公告)号：EP4336451A1
公开(公告)日：2024-03-13
申请号：EP21943595.5
申请日：2021-06-04
发明人： CAO, Xiaoran , CAI, Kangying , WANG, Pei , TU, Chenxi , SU, Qi
IPC分类号： G06T9/00 , H04N19/124
摘要： An apparatus and a method for encoding a 3D map are provided. The apparatus for encoding a 3D map includes a compression module (51) and a transmission module (52). The compression module (51) is configured to compress data of a 3D map to obtain a bitstream of the 3D map, where the 3D map includes a plurality of 3D map points, and the data of the 3D map includes data of the plurality of 3D map points. The transmission module (52) is configured to transmit the bitstream of the 3D map. With the use of the apparatus, a data volume of a 3D map can be reduced, thereby reducing transmission bandwidth and improving transmission efficiency.
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7.发明公开
公开(公告)号：EP4388498A1
公开(公告)日：2024-06-26
申请号：EP21819247.4
申请日：2021-10-28
IPC分类号： G06T9/40 , H04N19/96 , G06T9/00 , H04N19/597 , H04N19/13 , H04N19/136 , H04N19/184
CPC分类号： G06T9/40 , H04N19/96 , G06T9/005 , H04N19/597 , H04N19/13 , H04N19/136 , H04N19/184
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公开(公告)号：EP4336456A1
公开(公告)日：2024-03-13
申请号：EP21943596.3
申请日：2021-06-04
发明人： CAO, Xiaoran , CAI, Kangying , WANG, Pei , TU, Chenxi , SU, Qi
IPC分类号： G06T17/05
摘要： This application provides an apparatus and a method for decoding a 3D map, and an encoded bitstream of a 3D map. The apparatus for decoding a 3D map in this application includes a transmission module and a decompression module. The transmission module is configured to receive a bitstream of a 3D map, where the 3D map includes a plurality of 3D map points. The decompression module is configured to decompress the bitstream of the 3D map to obtain reconstructed data of the 3D map, where the reconstructed data of the 3D map includes reconstructed data of the plurality of 3D map points. In this application, the decompressor end may support decompression of compressed data of the 3D map, to support compression/decompression of data of the 3D map. This can reduce a quantity of bits occupied by the data of the 3D map, thereby reducing transmission bandwidth, and improving transmission efficiency.
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