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1.发明公开
公开(公告)号：EP4443872A1
公开(公告)日：2024-10-09
申请号：EP22900607.7
申请日：2022-12-01
发明人： ZHANG, Wei , YANG, Fuzheng , LU, Jingyun , LV, Zhuoyi
IPC分类号： H04N13/30
CPC分类号： H04N13/161 , H04N19/13 , H04N13/30 , H04N19/136
摘要： Disclosed are a point cloud coding method, a point cloud decoding method and a related device, which belong to the technical field of computers. The point cloud coding method in an example of the present disclosure includes: determining a distribution characteristic value, where the distribution characteristic value is configured to denote distribution characteristic information (101) of to-be-coded attribute information; determining, based on the distribution characteristic value, a target order corresponding to the to-be-coded attribute information, where the target order is an order (102) of exponential-Golomb coding; and entropy-coding the to-be-coded attribute information based on an exponential-Golomb coding algorithm of the target order, and obtaining an attribute code stream (103).
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公开(公告)号：EP4456533A1
公开(公告)日：2024-10-30
申请号：EP22909824.9
申请日：2022-12-13
发明人： LV, Zhuoyi , ZHOU, Chuan
IPC分类号： H04N19/139
摘要： This application discloses an inter-frame prediction method and a terminal and pertains to the field of video encoding and decoding technologies. The inter-frame prediction method according to embodiments of this application includes: obtaining first motion information of a first block and second motion information of a second block; determining first and second prediction values corresponding to each pixel point in a first pixel region associated with the first block; and determining a target prediction value corresponding to each pixel point in a second pixel region of the first block based on target information; where the first block is a block to be encoded, and the second block is an encoded block; or the first block is a block to be decoded, and the second block is a decoded block.
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3.发明公开
公开(公告)号：EP4443873A1
公开(公告)日：2024-10-09
申请号：EP22900624.2
申请日：2022-12-01
发明人： ZHANG, Wei , YANG, Fuzheng , LU, Jingyun , LV, Zhuoyi
IPC分类号： H04N13/30 , H04N19/103 , H04N19/124
CPC分类号： H04N19/91 , H04N19/93 , H04N19/94 , H04N13/161 , H04N19/124 , H04N13/30 , H04N19/103
摘要： This application discloses a point cloud encoding and decoding method and apparatus, and pertains to the field of point cloud processing technologies. The point cloud encoding method in embodiments of this application includes: An encoder determines, based on attribute information of target point cloud, a target attribute information distribution characteristic value corresponding to a target bit rate point, where the target bit rate point is a bit rate point corresponding to an attribute quantization step of the attribute information (201); the encoder determines a target run-length encoding manner based on the target attribute information distribution characteristic value (202); and the encoder performs encoding processing on the attribute information based on the target run-length encoding manner (203).
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公开(公告)号：EP4329312A1
公开(公告)日：2024-02-28
申请号：EP22819566.5
申请日：2022-06-08
发明人： ZHANG, Wei , NIE, Jiaming , LV, Zhuoyi , YANG, Fuzheng
摘要： This application discloses a point cloud encoding processing method and decoding processing method, and related devices. The point cloud encoding processing method of embodiments of this application includes: obtaining a current to-be-encoded node in a target queue, where the target queue includes an occupied node in a space block corresponding to a constructed tree structure based on first geometric information, the first geometric information is obtained by preprocessing based on geometric information of a to-be-encoded N-th frame point cloud, and N is an integer greater than 1; and determining an encoding mode of the current to-be-encoded node based on whether the current to-be-encoded node meets an encoding condition of an isolated point. The encoding condition of the isolated point includes: An occupancy status of a target node meets a preset condition. The target node is a node that is in encoded nodes and that is associated with the current to-be-encoded node.
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公开(公告)号：EP4460005A1
公开(公告)日：2024-11-06
申请号：EP22914485.2
申请日：2022-12-22
发明人： LV, Zhuoyi , QIN, Fei , ZHOU, Chuan , ZHANG, Jinrong
摘要： This application discloses a loop filtering method and a terminal, and pertains to the field of video compression technologies. The loop filtering method in the embodiments of this application includes: obtaining, by an electronic device, semantic block information of a picture to be filtered; determining, based on the semantic block information, at least one semantic block included in the picture to be filtered; and performing, for each semantic block by using a filter corresponding to the semantic block, loop filtering processing on a first reconstruction value corresponding to the semantic block, to obtain a second reconstruction value corresponding to the semantic block.
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公开(公告)号：EP4443871A1
公开(公告)日：2024-10-09
申请号：EP22900611.9
申请日：2022-12-01
发明人： ZHANG, Wei , YANG, Fuzheng , NIE, Jiaming , LV, Zhuoyi
IPC分类号： H04N13/161
CPC分类号： H04N19/159 , H04N19/96 , H04N13/161 , H04N19/13 , H04N19/124
摘要： This application discloses a point cloud encoding/decoding processing method and apparatus, an encoding device, and a decoding device, and pertains to the field of audio/video processing. The point cloud encoding processing method according to the embodiments of this application includes: performing, by an encoding end, synchronous multi-branch tree division on a current frame to be encoded and an encoded frame; and performing, by the encoding end based on a target value corresponding to a first node in the encoded frame, inter prediction on an occupancy status of a second node in the frame to be encoded, where the occupancy status includes: occupied or unoccupied, where a position of the first node in the encoded frame is the same as a position of the second node in the frame to be encoded, and the target value includes one of the following: the number of points included in a space corresponding to the first node; density of the points included in the space corresponding to the first node; the number of points included in a first child node included in the first node, where the first node includes at least one first child node; and density of the points included in the first child node included in the first node.
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7.发明公开
公开(公告)号：EP4395323A1
公开(公告)日：2024-07-03
申请号：EP22860370.0
申请日：2022-08-18
发明人： ZHANG, Wei , LU, Jingyun , LV, Zhuoyi , YANG, Fuzheng , DAI, Na
IPC分类号： H04N19/61 , H04N19/645 , H04N19/96 , H04N19/169
CPC分类号： H04N19/48 , H04N19/176 , H04N19/13 , H04N19/124 , H04N19/645 , H04N19/61 , H04N19/96 , H04N19/169
摘要： This application discloses a point cloud attribute coding method, a point cloud attribute decoding method, and a terminal, and pertains to the field of point cloud processing technologies. The point cloud attribute coding method includes: obtaining a to-be-coded point cloud; partitioning the to-be-coded point cloud into at least one to-be-coded point cloud block based on the number of to-be-coded points included in the to-be-coded point cloud, volume information of a bounding box corresponding to the to-be-coded point cloud, and an order of each to-be-coded point; for each to-be-coded point cloud block including at least two to-be-coded points, partitioning the to-be-coded point cloud block into N to-be-coded point cloud groups based on the number of to-be-coded points included in the to-be-coded point cloud block and a preset maximum transform order; performing transform coding and quantization processing on first residual information corresponding to a first target to-be-coded point cloud group, to obtain a quantized first transform coefficient; and performing entropy coding on the quantized first transform coefficient and second residual information corresponding to a second target to-be-coded point cloud group to generate a target code stream.
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8.发明公开
公开(公告)号：EP4319167A1
公开(公告)日：2024-02-07
申请号：EP22819607.7
申请日：2022-06-09
发明人： ZHANG, Wei , TIAN, Tengya , LV, Zhuoyi , YANG, Fuzheng
摘要： This application discloses a point cloud encoding processing method and apparatus and a point cloud decoding processing method and apparatus. The point cloud encoding processing method of embodiments of this application includes: determining sparsity level information of a target point cloud; and in a case that the sparsity level information indicates the target point cloud being a sparse point cloud and a node to be encoded corresponding to the target point cloud satisfies an isolated point encoding condition, enabling an isolated point encoding mode.
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9.发明公开
公开(公告)号：EP4443876A1
公开(公告)日：2024-10-09
申请号：EP22900618.4
申请日：2022-12-01
发明人： ZHANG, Wei , YANG, Fuzheng , LU, Jingyun , LV, Zhuoyi
IPC分类号： H04N19/124
CPC分类号： H04N19/91 , H04N19/42 , H04N19/124
摘要： This application discloses an attribute quantization and dequantization method and apparatus, and a device, and pertains to the field of point cloud processing technologies. The attribute quantization method in embodiments of this application includes: A first device determines a quantization correction factor based on target information, where the target information includes at least one of geometric information or attribute information of a target point cloud, and the quantization correction factor is used to perform correction on a target quantization step size. The first device performs correction on the target quantization step size based on the quantization correction factor, to obtain a corrected quantization step size, and performs quantization processing on the target point cloud based on the corrected quantization step size.
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公开(公告)号：EP4443870A1
公开(公告)日：2024-10-09
申请号：EP22900605.1
申请日：2022-12-01
发明人： ZHANG, Wei , YANG, Fuzheng , LU, Jingyun , LV, Zhuoyi
IPC分类号： H04N13/161
CPC分类号： H04N19/119 , H04N19/96 , H04N13/161 , H04N19/13 , H04N19/136
摘要： This application discloses a point cloud attribute coding method, a point cloud decoding method, and a terminal, and belongs to the field of point cloud processing technologies. The point cloud attribute coding method according to an embodiment of this application includes: An encoder side obtains a to-be-coded point cloud, where the to-be-coded point cloud includes at least one type of attribute information, and each coding point in the to-be-coded point cloud includes an attribute value corresponding to the attribute information. The encoder side determines a target ordering manner of the to-be-coded point cloud based on an initial order corresponding to the to-be-coded point cloud or based on the initial order and density corresponding to the to-be-coded point cloud, where the initial order is determined based on an attribute value of a target coding point in the to-be-coded point cloud, and the density is determined based on geometric information of the to-be-coded point cloud and a quantity of coding points in the to-be-coded point cloud. The encoder side codes the to-be-coded point cloud according to the target ordering manner.
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