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公开(公告)号：US11875538B2
公开(公告)日：2024-01-16
申请号：US17205100
申请日：2021-03-18
发明人： Dejun Zhang , Tian Wang , Vladyslav Zakharchenko
IPC分类号： G06T9/00 , H04N19/172
CPC分类号： G06T9/00 , H04N19/172
摘要： A point cloud encoding method is provided to improve coding efficiency. The method includes: obtaining global matched patches in N frames of point clouds in a point cloud group; determining M union patch occupancy maps corresponding to M sets, where a union patch occupancy map corresponding to an mth set is a union set of occupancy maps of all global matched patches in the mth set; packing the M union patch occupancy maps to obtain a global occupancy map; packing each of the N frames of point clouds to obtain occupancy maps of the N frames of point clouds; and encoding the N frames of point clouds based on the occupancy maps of the N frames of point clouds.
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公开(公告)号：US20230319279A1
公开(公告)日：2023-10-05
申请号：US18330945
申请日：2023-06-07
发明人： Lijun Dong , Vladyslav Zakharchenko
IPC分类号： H04N19/124 , H04N19/176 , H04N19/18
CPC分类号： H04N19/124 , H04N19/176 , H04N19/18
摘要： A media data coding mechanism is disclosed. The mechanism includes partitioning media data into a plurality of blocks. A transform is applied to the blocks to obtain a plurality of quantization coefficients. The quantization coefficients are sorted into quality layers of decreasing priority based on frequency, wherein each subsequent layer includes data to incrementally increase quality of a reconstructed media data. Quantization coefficients for all blocks are positioned in a media data packet according to quality layer in order of decreasing priority. The media data packet is stored.
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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
发明人： Vladyslav Zakharchenko , Dejun Zhang , Kangying Cai , Jianle Chen
IPC分类号： H04N19/70 , H04N19/597 , H04N19/85 , H04N19/17
摘要： 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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公开(公告)号：US20240283974A1
公开(公告)日：2024-08-22
申请号：US18653180
申请日：2024-05-02
发明人： Ye-Kui Wang , FNU Hendry , Vladyslav Zakharchenko
IPC分类号： H04N19/597 , G06T9/00 , H04N19/172 , H04N19/184 , H04N19/46 , H04N19/70
CPC分类号： H04N19/597 , G06T9/00 , H04N19/172 , H04N19/184 , H04N19/46 , H04N19/70
摘要： A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a plurality of coded sequences of point cloud coding (PCC) frames. The plurality of coded sequences of PCC frames represent a plurality of PCC attributes including geometry, texture, and one or more of reflectance, transparency, and normal. Each coded PCC frame is represented by one or more PCC network abstraction layer (NAL) units.
The mechanism also includes parsing the bitstream to obtain, for each PCC attribute, an indication of one of a plurality of video codecs used to code the corresponding PCC attribute. The mechanism also includes decoding the bitstream based on the indicated video codecs for the PCC attributes.-
公开(公告)号：US11388442B2
公开(公告)日：2022-07-12
申请号：US17217404
申请日：2021-03-30
发明人： Dejun Zhang , Tian Wang , Vladyslav Zakharchenko
IPC分类号： H04B1/66 , H04N7/12 , H04N11/02 , H04N11/04 , H04N19/70 , H04N19/172 , H04N19/177 , H04N19/184
摘要： Example point cloud encoding apparatus and point cloud decoding apparatus are provided for effectively encoding and decoding point cloud data. The point cloud encoding apparatus is configured for obtaining auxiliary information of a union occupancy map corresponding to a point cloud group, where the point cloud group includes N frames of point clouds, N≥2, and N is an integer. The union occupancy map is a union set of occupancy maps of N patches having a matching relationship in the N frames of point clouds, and the auxiliary information of the union occupancy map is used to determine auxiliary information of the N patches. A syntax element is encoded into a bitstream, where the syntax element includes the auxiliary information of the union occupancy map.
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公开(公告)号：US20210203989A1
公开(公告)日：2021-07-01
申请号：US17200418
申请日：2021-03-12
发明人： Ye-Kui Wang , FNU Hendry , Vladyslav Zakharchenko
IPC分类号： H04N19/597 , H04N19/70 , H04N19/46 , H04N19/172
摘要： A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a plurality of coded sequences of point cloud coding (PCC) frames. The plurality of coded sequences of PCC frames represent a plurality of PCC attributes including geometry, texture, and one or more of reflectance, transparency, and normal. Each coded PCC frame is represented by one or more PCC network abstraction layer (NAL) units. The mechanism also includes parsing the bitstream to obtain, for each PCC attribute, an indication of one of a plurality of video codecs used to code the corresponding PCC attribute. The mechanism also includes decoding the bitstream based on the indicated video codecs for the PCC attributes.
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公开(公告)号：US20210201539A1
公开(公告)日：2021-07-01
申请号：US17200435
申请日：2021-03-12
发明人： Ye-Kui Wang , FNU Hendry , Vladyslav Zakharchenko
IPC分类号： G06T9/00 , H04N19/70 , H04N19/184
摘要： A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a plurality of coded sequences of point cloud coding (PCC) frames, wherein the plurality of coded sequences of PCC frames represent a plurality of PCC attributes including geometry, texture, and one or more of reflectance, transparency, and normal. Each coded PCC frame is represented by one or more PCC network abstraction layer (NAL) units. The mechanism also includes parsing the bitstream to obtain an indication for each of the PCC NAL units that indicates whether each of the PCC NAL units belongs to a corresponding one of the PCC attributes, and to which of the PCC attributes the PCC NAL unit belongs when the PCC NAL unit belongs to the corresponding PCC attribute. The mechanism also includes decoding the bitstream based on the indications.
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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
摘要： 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：US11973987B2
公开(公告)日：2024-04-30
申请号：US17369408
申请日：2021-07-07
发明人： Vladyslav Zakharchenko , Dejun Zhang , Kangying Cai , Jianle Chen
IPC分类号： H04N19/70 , H04N19/17 , H04N19/597 , H04N19/85
CPC分类号： H04N19/70 , H04N19/17 , H04N19/597 , H04N19/85
摘要： 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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公开(公告)号：US20220301229A1
公开(公告)日：2022-09-22
申请号：US17712794
申请日：2022-04-04
发明人： Dejun Zhang , Bo Liu , Vladyslav Zakharchenko
IPC分类号： G06T9/00 , H04N19/119 , H04N19/147 , H04N19/184 , H04N19/70
摘要： A point cloud coding method includes obtaining description information of a bounding box size of a to-be-encoded point cloud and a normal axis of a to-be-encoded patch in the to-be-encoded point cloud, where the description information of the bounding box size of the to-be-encoded point cloud and the normal axis of the to-be-encoded patch are used to determine a tangent axis of the to-be-encoded patch and a bitangent axis of the to-be-encoded patch, and encoding a syntax element into a bitstream, where the syntax element includes an index of the normal axis of the to-be-encoded patch and information for indicating the description information of the bounding box size of the to-be-encoded point cloud, and the syntax element is used to indicate the tangent axis of the to-be-encoded patch and the bitangent axis of the to-be-encoded patch.
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