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公开(公告)号：US12212762B2
公开(公告)日：2025-01-28
申请号：US17477812
申请日：2021-09-17
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Kangying Cai , Dejun Zhang
IPC: H04N19/20 , H04N19/136 , H04N19/184 , H04N19/70
Abstract: This application discloses a point cloud encoding method and apparatus, a point cloud decoding method and apparatus, and a storage medium for point cloud encoding and/or decoding, and belongs to a data processing field. The method includes: first obtaining auxiliary information of a to-be-encoded patch, and then encoding the auxiliary information and a first index of the to-be-encoded patch into a bitstream. Values of the first index may be a first value, a second value, and a third value. Different values indicate different types of patches. Therefore, different types of patches can be distinguished by using the first index. For different types of patches, their corresponding auxiliary information encoded into a bitstream may comprise different contents. This can simplify a format of information encoded into the bitstream, reduce bit overheads of the bitstream, and improve encoding efficiency.
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公开(公告)号：US20250008104A1
公开(公告)日：2025-01-02
申请号：US18884380
申请日：2024-09-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zehui Lin , Kangying Cai , Rong Wei , Yunneng Mo
IPC: H04N19/124 , G06T15/80 , H04N19/146 , H04N19/164
Abstract: An encoding method includes obtaining probe data, where the probe data corresponds to one or more probes in a three-dimensional (3D) scene, and the probe data is used by a second device to determine shading effect of an object in the 3D scene in a rendering process; performing data form conversion on the probe data to obtain intermediate data, where the data form conversion includes domain conversion; and encoding the intermediate data to obtain a corresponding bitstream.
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公开(公告)号：US20240102826A1
公开(公告)日：2024-03-28
申请号：US18526721
申请日：2023-12-01
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xiaoran Cao , Kangying Cai , Pei Wang , Chenxi Tu , Qi Su
CPC classification number: G01C21/3896 , G06T9/00
Abstract: 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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公开(公告)号：US20210398324A1
公开(公告)日：2021-12-23
申请号：US17466844
申请日：2021-09-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Vladyslav Zakharchenko , Jianle Chen , Kangying Cai
Abstract: A method of point cloud coding (PCC) including receiving encoded patch information data; obtaining a patch corresponding to the encoded patch information data, the patch having a patch type; determining whether the patch type for the patch is a last patch type; and terminating a reconstruction process corresponding to the encoded patch information data when the patch type is the last patch type. Another method includes the same receiving and obtaining steps, but determining whether the patch type for the patch is a skip patch type; decoding a reference patch index corresponding to the patch when the patch type is the skip patch type; determining a reference index for the patch based on a reference frame index corresponding to the patch and the reference patch index as decoded when the patch type is the skip patch type; and reconstructing a volumetric representation of the patch.
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公开(公告)号：US20210337237A1
公开(公告)日：2021-10-28
申请号：US17369408
申请日：2021-07-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Vladyslav Zakharchenko , Dejun Zhang , Kangying Cai , Jianle Chen
IPC: H04N19/70 , H04N19/597 , H04N19/85 , H04N19/17
Abstract: A method of point cloud coding (PCC) implemented by a decoder is provided. The method includes receiving, by a receiver of the decoder, a bitstream containing a patch rotation enabled flag and atlas information for a two dimensional (2D) patch; determining, by a processor of the decoder, that the 2D patch is capable of being rotated based on the patch rotation enabled flag; rotating, by the processor, the 2D patch; and reconstructing, by the processor, a three dimensional (3D) image using the atlas information and the 2D patch as rotated.
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Patent Agency Ranking
公开(公告)号：US20250113048A1
公开(公告)日：2025-04-03
申请号：US18978129
申请日：2024-12-12
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Kangying Cai , Dejun Zhang
IPC: H04N19/20 , H04N19/136 , H04N19/184 , H04N19/70
Abstract: A method and apparatus for point cloud encoding, a method and apparatus for point cloud decoding, and a related storage medium are disclosed. The method for point cloud encoding includes: obtaining auxiliary information of a to-be-encoded patch, and then encoding the auxiliary information and a first index of the to-be-encoded patch into a bitstream. The first index may have different values, including a first value, a second value, and a third value. These different values indicate different types of patches. That is, different types of patches can be distinguished by using the first index. For different types of patches, content included in auxiliary information encoded into a bitstream may be different. This can simplify a format of information encoded into the bitstream, reduce bit overheads of the bitstream, and improve encoding efficiency.
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公开(公告)号：US20240111793A1
公开(公告)日：2024-04-04
申请号：US18526846
申请日：2023-12-01
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xiaoran Cao , Kangying Cai
IPC: G06F16/29 , G06F16/487 , G06T17/05
CPC classification number: G06F16/29 , G06F16/487 , G06T17/05
Abstract: A method and an apparatus for retrieving a 3D map are provided. The method for retrieving a 3D map includes: obtaining binary data of S 3D map descriptors; performing stage-i retrieval in the binary data of the S 3D map descriptors based on binary data of a retrieval descriptor, to obtain P 3D map descriptors through screening; performing stage-m decompression on compressed data of the P 3D map descriptors to obtain reconstructed data of the P 3D map descriptors; and performing stage-j retrieval in the reconstructed data of the P 3D map descriptors based on partial data or all data of the retrieval descriptor, to obtain Q 3D map descriptors.
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公开(公告)号：US20210304444A1
公开(公告)日：2021-09-30
申请号：US17345523
申请日：2021-06-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Dejun Zhang , Kangying Cai
Abstract: A point cloud encoding method includes grouping a to-be-coded point cloud group into a plurality of subgroups, where the grouping a to-be-coded point cloud group into a plurality of subgroups includes pre-grouping a plurality of frames of point clouds in the to-be-coded point cloud group to obtain a pre-grouped subgroup, and determining, based on feature information of the pre-grouped subgroup, that the pre-grouped subgroup is one of the plurality of subgroups, where the feature information represents a size of an occupancy map of a point cloud in the pre-grouped subgroup, and encoding a point cloud included in the plurality of subgroups.
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公开(公告)号：US20240314350A1
公开(公告)日：2024-09-19
申请号：US18672686
申请日：2024-05-23
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Chenxi Tu , Kangying Cai , Xiaoran Cao
CPC classification number: H04N19/52 , G01S7/4808 , G01S17/89
Abstract: Method and apparatus for compressing lidar data provide for obtaining to-be-compressed data, where the to-be-compressed data is measurement data collected by lidar through N transmissions, where N≥1. When the to-be-compressed data includes corresponding distance measurement data and signal intensity measurement data, the distance measurement data is compressed to obtain a first bitstream. Signal intensity measurement data is predicted based on the distance measurement data to obtain a second bitstream.
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公开(公告)号：US12002243B2
公开(公告)日：2024-06-04
申请号：US17466844
申请日：2021-09-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Vladyslav Zakharchenko , Jianle Chen , Kangying Cai
Abstract: A method of point cloud coding (PCC) including receiving encoded patch information data; obtaining a patch corresponding to the encoded patch information data, the patch having a patch type; determining whether the patch type for the patch is a last patch type; and terminating a reconstruction process corresponding to the encoded patch information data when the patch type is the last patch type. Another method includes the same receiving and obtaining steps, but determining whether the patch type for the patch is a skip patch type; decoding a reference patch index corresponding to the patch when the patch type is the skip patch type; determining a reference index for the patch based on a reference frame index corresponding to the patch and the reference patch index as decoded when the patch type is the skip patch type; and reconstructing a volumetric representation of the patch.
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