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公开(公告)号：EP3649779A1
公开(公告)日：2020-05-13
申请号：EP18737866.6
申请日：2018-07-02
IPC分类号： H04N19/126 , H04N19/186 , H04N19/157
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公开(公告)号：EP3627837A1
公开(公告)日：2020-03-25
申请号：EP18306226.4
申请日：2018-09-21
IPC分类号： H04N19/147 , H04N19/186 , H04N19/82
摘要： In at least one embodiment, encoding or decoding a picture part can include using a refinement mode per block where the refinement mode can be based on a refinement parameter. The refinement mode can include a cross-component refinement that can be a cross-component chroma refinement. The refinement mode can include enabling selection per block of a refinement parameter where the refinement parameter can include one or more chroma refinement parameters included in a chroma refinement table.
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公开(公告)号：EP3939322A1
公开(公告)日：2022-01-19
申请号：EP20716355.1
申请日：2020-03-12
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公开(公告)号：EP3906691A1
公开(公告)日：2021-11-10
申请号：EP19839202.9
申请日：2019-12-16
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公开(公告)号：EP4207759A1
公开(公告)日：2023-07-05
申请号：EP23158005.1
申请日：2018-03-15
IPC分类号： H04N19/126 , H04N19/136 , H04N19/50 , H04N19/176 , H04N19/196 , H04N19/117 , H04N19/186 , H04N19/182 , H04N19/82
摘要： A method for encoding a block of a picture is disclosed. The method comprises for at least one sample of the block and for one current component:
- obtaining a prediction value;
- determining a mapped residual value from a source value of the sample and from the prediction value responsive to a mapping function; and
- encoding the mapped residual value into a bitstream;
wherein the mapping function is derived to obtain at least one of a reduction of a bit cost of the bitstream for a given quality of reconstruction or an increase of quality of reconstruction for a given bit cost of the bitstream.-
公开(公告)号：EP3811620A1
公开(公告)日：2021-04-28
申请号：EP19732866.9
申请日：2019-06-11
IPC分类号： H04N19/147 , H04N19/186 , H04N19/82
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公开(公告)号：EP3700217A1
公开(公告)日：2020-08-26
申请号：EP19305213.1
申请日：2019-02-22
摘要： Reshaping can be used to better exploit the sample value distribution of video data. When reshaping is used inside the coding loop, forward mapping is applied to prediction signals from intra or inter prediction, and inverse mapping is applied to reconstructed signals. To simplify the inverse mapping operations, in one embodiment, the inverse mapping function is modelled as a piece-wise linear function, and each line segment is defined on an equi-distant interval of a length equal to a power of 2. In this embodiment, the inverse mapping function is specified by the number of pieces, initial offset value and the slope for each piece. In one example, the slope parameters can be signaled directly in the bitstream. In another example, an initial estimate of the slope parameters can be obtained from the forward mapping function, and the difference between the initial estimate and the actual parameters are signaled.
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公开(公告)号：EP3607746A1
公开(公告)日：2020-02-12
申请号：EP18711334.5
申请日：2018-03-15
IPC分类号： H04N19/126 , H04N19/136 , H04N19/50 , H04N19/176 , H04N19/196 , H04N19/117 , H04N19/186 , H04N19/182
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公开(公告)号：EP3456053A1
公开(公告)日：2019-03-20
申请号：EP17721170.3
申请日：2017-05-05
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公开(公告)号：EP4221201A1
公开(公告)日：2023-08-02
申请号：EP23172565.6
申请日：2019-01-04
IPC分类号： H04N19/105 , H04N19/176 , H04N19/147 , H04N19/463 , H04N19/186 , H04N19/85 , H04N19/90
摘要： An encoding method is disclosed. A picture part is encoded (S 120) in a bitstream and reconstructed comprising. Refinement data are determined (S 130) such that:
- a rate distortion cost computed as a weighted sum of data coding cost and of a distortion between an original version of said picture part and said reconstructed picture part after refinement by said refinement data is decreased compared to a rate distortion cost computed as a weighted sum of data coding cost and of a distortion between said original version of said picture part and said reconstructed picture part without refinement in the case where no mapping applies before coding;
- a rate distortion cost computed as a weighted sum of data coding cost and of a distortion between an original version of said picture part and said reconstructed picture part after inverse mapping and refinement by said refinement data is decreased compared to a rate distortion cost computed as a weighted sum of data coding cost and of a distortion between said original version of said picture part and said reconstructed picture part after inverse mapping without refinement in the case where mapping applies before coding and said refinement is out of the decoding loop;
- a rate distortion cost computed as a weighted sum of data coding cost and of a distortion between a mapped original version of said picture part and said reconstructed picture part after refinement by said refinement data is decreased compared to a rate distortion cost computed as a weighted sum of data coding cost and of a distortion between said mapped original version of said picture part and said reconstructed picture part without refinement in the case where mapping applies before coding and said refinement is in the decoding loop.
Finally, the refinement data are encoded (S 140) in the bitstream.
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