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公开(公告)号：US20210235104A1
公开(公告)日：2021-07-29
申请号：US17230769
申请日：2021-04-14
Inventor： Junyan HUO , Yanzhuo MA , Shuai WAN , Wei ZHANG , Fuzheng YANG , Haixin WANG , Yu SUN
IPC: H04N19/50 , H04N19/176
Abstract: Provided are a picture encoding and decoding method, an encoder, a decoder and a storage medium. The decoder decodes a bitstream to obtain a size, a coding mode, and residuals of a current block; when the coding mode of the current block is an MIP mode, calculates a second offset based on the size of the current block, a first offset and reconstructed values of adjacent pixels corresponding to the current block; calculates a second prediction value of a pixel at a preset position in the current block by using the second offset, the preset position being a particular position in the current block; performs filtering on the second prediction value to obtain first prediction values of all pixels in the current block; and calculates sum values of the first prediction values and the residuals, and sets the sum values as reconstructed values of the current block.
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公开(公告)号：US20210218971A1
公开(公告)日：2021-07-15
申请号：US17211636
申请日：2021-03-24
Inventor： Shuai WAN , Junyan HUO , Yanzhuo MA , Fuzheng YANG , Jinkun GUO , Haixin WANG
IPC: H04N19/159 , H04N19/184 , H04N19/172 , G06F5/01
Abstract: Picture coding and decoding methods, an encoder, a decoder and a storage medium are provided. The encoder, before performing coding processing according to a matrix-based intra prediction (MIP) mode, sets initial right shift parameters corresponding to different sizes and different MIP mode numbers as an uniform offset parameter, the offset parameter indicating a number of right shifting bits of a predicted value, and when performing coding processing according to the MIP mode, performs coding processing according to the offset parameter. The decoder, before performing decoding processing according to an MIP mode, sets initial right shift parameters corresponding to different sizes and different MIP mode numbers as an uniform offset parameter, the offset parameter indicating a number of right shifting bits of a predicted value, and when performing decoding processing according to the MIP mode, performs decoding processing according to the offset parameter.
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公开(公告)号：US20230053024A1
公开(公告)日：2023-02-16
申请号：US17968883
申请日：2022-10-19
Inventor： Junyan HUO , Shuai WAN , Yanzhuo MA , Haixin WANG , Fuzheng YANG
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: A method for decoding a picture, a method for encoding a picture, an encoder, and a decoder are provided. The method for encoding a picture includes (i) determining a width and a height of a coding block in the picture; (ii) if the width and the height are equal to N, where N is a positive integer power of 2, determining a matrix-based intra prediction (MIP) size identifier indicating that an MIP prediction size equal to N; (iii) deriving a group of reference samples of the coding block; and (iv) deriving an MIP prediction of the coding block based on the group of reference samples and an MIP matrix corresponding to the MIP size identifier.
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公开(公告)号：US20230007279A1
公开(公告)日：2023-01-05
申请号：US17942679
申请日：2022-09-12
Inventor： Shuai WAN , Yanzhuo MA , Junyan HUO , Haixin WANG , Fuzheng YANG
IPC: H04N19/186 , H04N19/105 , H04N19/132 , H04N19/147 , H04N19/176 , H04N19/593 , H04N19/70 , H04N19/80
Abstract: A method for colour component prediction, applied to an encoder and includes: determining a neighbouring reference sample set of a current block, wherein the neighbouring reference sample set comprises at least one reference sample; determining a preset parameter value corresponding to the current block, including: determining a bitdepth value corresponding to a to-be-predicted colour component of the current block; and performing a shift on 1 by the bitdepth value minus 1 to obtain the preset parameter value. The method further includes: determining an input sample matrix by means of a first preset calculation model based on the neighbouring reference sample set and the preset parameter value; and performing colour component prediction on the current block according to the input sample matrix to obtain a prediction block of the current block.
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公开(公告)号：US20220141453A1
公开(公告)日：2022-05-05
申请号：US17579795
申请日：2022-01-20
Inventor： Junyan HUO , Shuai WAN , Yanzhuo MA , Haixin WANG , Fuzheng YANG
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: A method for decoding a picture, a method for encoding a picture, an encoder, and a decoder are provided. The method for encoding a picture includes (i) determining a width and a height of a coding block in the picture; (ii) if the width and the height are equal to N, where N is a positive integer power of 2, determining a matrix-based intra prediction (MIP) size identifier indicating that an MIP prediction size equal to N; (iii) deriving a group of reference samples of the coding block; and (iv) deriving an MIP prediction of the coding block based on the group of reference samples and an MIP matrix corresponding to the MIP size identifier.
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公开(公告)号：US20240283914A1
公开(公告)日：2024-08-22
申请号：US18649645
申请日：2024-04-29
Inventor： Junyan HUO , Shuai WAN , Yanzhuo MA , Haixin WANG , Fuzheng YANG
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
CPC classification number: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: A method for decoding a picture, a method for encoding a picture, an encoder, and a decoder are provided. The method for encoding a picture includes (i) determining a width and a height of a coding block in the picture; (ii) if the width and the height are equal to N, where N is a positive integer power of 2, determining a matrix-based intra prediction (MIP) size identifier indicating that an MIP prediction size equal to N; (iii) deriving a group of reference samples of the coding block; and (iv) deriving an MIP prediction of the coding block based on the group of reference samples and an MIP matrix corresponding to the MIP size identifier.
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公开(公告)号：US20240236335A1
公开(公告)日：2024-07-11
申请号：US18615548
申请日：2024-03-25
Inventor： Junyan HUO , Yanzhuo MA , Shuai WAN , Fuzheng YANG , Wei ZHANG , Haixin WANG , Yu SUN
IPC: H04N19/159 , H04N19/105 , H04N19/117 , H04N19/119 , H04N19/176 , H04N19/593 , H04N19/70
CPC classification number: H04N19/159 , H04N19/105 , H04N19/117 , H04N19/119 , H04N19/176 , H04N19/593 , H04N19/70
Abstract: Methods for determining a prediction value, an encoder and a decoder are provided. A bitstream is parsed to obtain a size and a coding mode of a current block. Reconstructed values of neighboring samples are acquired and the reconstructed values of the neighboring samples are filtered. A second constant value is calculated according to a bit depth value of a luma component of a sample in the current block. A difference between the second constant value and a first reference value in the reference value set is assigned as a first prediction input value in a prediction input value set. Other prediction input values in the prediction input value set other than the first prediction input value are determined. Prediction values of samples at specific positions in the current block are calculated. The prediction values are filtered to obtain prediction values of all samples in the current block.
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公开(公告)号：US20240107050A1
公开(公告)日：2024-03-28
申请号：US18527169
申请日：2023-12-01
Inventor： Junyan HUO , Yanzhuo MA , Shuai WAN , Wei ZHANG , Fuzheng YANG , Haixin WANG , Yu SUN
IPC: H04N19/50 , H04N19/176
CPC classification number: H04N19/50 , H04N19/176
Abstract: Provided are a picture encoding and decoding method, an encoder, a decoder and a storage medium. The decoder decodes a bitstream to obtain a size, a coding mode, and residuals of a current block; when the coding mode of the current block is an MIP mode, calculates a second offset based on the size of the current block, a first offset and reconstructed values of adjacent pixels corresponding to the current block; determines a first prediction value of the current block according to the second offset; and determines a reconstructed value of the current block based on the first prediction value.
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公开(公告)号：US20230038121A1
公开(公告)日：2023-02-09
申请号：US17968557
申请日：2022-10-18
Inventor： Junyan HUO , Shuai WAN , Yanzhuo MA , Haixin WANG , Fuzheng YANG
IPC: H04N19/105 , H04N19/159 , H04N19/132 , H04N19/176
Abstract: A method for decoding a picture, a method for encoding a picture, an encoder, and a decoder are provided. The method for encoding a picture includes (i) determining a width and a height of a coding block in the picture; (ii) if the width and the height are equal to N, where N is a positive integer power of 2, determining a matrix-based intra prediction (MIP) size identifier indicating that an MIP prediction size equal to N; (iii) deriving a group of reference samples of the coding block; and (iv) deriving an MIP prediction of the coding block based on the group of reference samples and an MIP matrix corresponding to the MIP size identifier.
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公开(公告)号：US20210274194A1
公开(公告)日：2021-09-02
申请号：US17325752
申请日：2021-05-20
Inventor： Junyan HUO , Yanzhuo MA , Shuai WAN , Fuzheng YANG , Wei ZHANG , Haixin WANG , Yu SUN
IPC: H04N19/159 , H04N19/176 , H04N19/593 , H04N19/105 , H04N19/119 , H04N19/117 , H04N19/70
Abstract: Methods for determining a prediction value, an encoder, and a decoder are provided. Reconstructed values of neighboring samples of a current block are acquired, and then filtered to obtain a reference value set of the current block. When a size of the current block is smaller than a preset threshold value, a first constant value is calculated according to a bit depth value of a luma component of a sample in the current block. A difference between the first constant value and a first reference value in the reference value set is determined as a first prediction input value in a prediction input value set. Other prediction input values in the prediction input value set other than the first prediction input value are determined according to the reference value set. Prediction values of samples at specific positions in the current block is calculated and then filtered.
