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公开(公告)号：US08971408B2
公开(公告)日：2015-03-03
申请号：US14370674
申请日：2013-01-23
发明人： Guan-Ming Su , Sheng Qu , Peng Yin
CPC分类号： H04N19/186 , H04N19/119 , H04N19/14 , H04N19/194 , H04N19/593
摘要： A sequence of visual dynamic range (VDR) images may be encoded using a standard dynamic range (SDR) base layer and one or more enhancement layers. A prediction image is generated by using piecewise cross-color channel prediction (PCCC), wherein a color channel in the SDR input may be segmented into two or more color channel segments and each segment is assigned its own cross-color channel predictor to derive a predicted output VDR image. PCCC prediction models may include first order, second order, or higher order parameters. Using a minimum mean-square error criterion, a closed form solution is presented for the prediction parameters for a second-order PCCC model. Algorithms for segmenting the color channels into multiple color channel segments are also presented.
摘要翻译： 可以使用标准动态范围（SDR）基础层和一个或多个增强层对视觉动态范围（VDR）图像序列进行编码。 通过使用分段交叉色信道预测（PCCC）生成预测图像，其中SDR输入中的彩色通道可以被分割成两个或更多个颜色通道段，并且每个段被分配其自己的交叉颜色通道预测器以导出 预测输出VDR图像。 PCCC预测模型可以包括一阶，二阶或更高阶参数。 使用最小均方误差准则，给出了二阶PCCC模型的预测参数的闭合形式解。 还给出了将颜色通道分割成多个颜色通道段的算法。
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公开(公告)号：US12108060B2
公开(公告)日：2024-10-01
申请号：US18477511
申请日：2023-09-28
发明人： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC分类号： H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
CPC分类号： H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
摘要： Methods and systems for frame rate scalability are described. Support is provided for input and output video sequences with variable frame rate and variable shutter angle across scenes, or for input video sequences with fixed input frame rate and input shutter angle, but allowing a decoder to generate a video output at a different output frame rate and shutter angle than the corresponding input values. Techniques allowing a decoder to decode more computationally-efficiently a specific backward compatible target frame rate and shutter angle among those allowed are also presented.
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公开(公告)号：US20240283983A1
公开(公告)日：2024-08-22
申请号：US18630786
申请日：2024-04-09
发明人： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
CPC分类号： H04N19/87 , H04N1/6058 , H04N19/46 , H04N19/85 , H04N19/98 , G09G2320/06 , G09G2340/06
摘要： In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized. HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.
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公开(公告)号：US11936888B1
公开(公告)日：2024-03-19
申请号：US18506758
申请日：2023-11-10
发明人： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC分类号： H04N19/172 , H04N19/187 , H04N19/30 , H04N19/31 , H04N19/46 , H04N19/70
CPC分类号： H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
摘要： Methods and systems for frame rate scalability are described. Support is provided for input and output video sequences with variable frame rate and variable shutter angle across scenes, or for input video sequences with fixed input frame rate and input shutter angle, but allowing a decoder to generate a video output at a different output frame rate and shutter angle than the corresponding input values. Techniques allowing a decoder to decode more computationally-efficiently a specific backward compatible target frame rate and shutter angle among those allowed are also presented.
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公开(公告)号：US11924477B2
公开(公告)日：2024-03-05
申请号：US18215129
申请日：2023-06-27
发明人： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
CPC分类号： H04N19/87 , H04N1/6058 , H04N19/46 , H04N19/85 , H04N19/98 , G09G2320/06 , G09G2340/06
摘要： In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized. HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.
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公开(公告)号：US11910025B1
公开(公告)日：2024-02-20
申请号：US18385724
申请日：2023-10-31
发明人： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
CPC分类号： H04N19/87 , H04N1/6058 , H04N19/46 , H04N19/85 , H04N19/98 , G09G2320/06 , G09G2340/06
摘要： In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.
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公开(公告)号：US20240015315A1
公开(公告)日：2024-01-11
申请号：US18334306
申请日：2023-06-13
发明人： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC分类号： H04N19/31 , H04N19/187 , H04N19/172 , H04N19/30 , H04N19/46 , H04N19/70
CPC分类号： H04N19/31 , H04N19/187 , H04N19/172 , H04N19/30 , H04N19/46 , H04N19/70
摘要： Methods and systems for frame rate scalability are described. Support is provided for input and output video sequences with variable frame rate and variable shutter angle across scenes, or for input video sequences with fixed input frame rate and input shutter angle, but allowing a decoder to generate a video output at a different output frame rate and shutter angle than the corresponding input values. Techniques allowing a decoder to decode more computationally-efficiently a specific backward compatible target frame rate and shutter angle among those allowed are also presented.
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公开(公告)号：US11871015B2
公开(公告)日：2024-01-09
申请号：US17950087
申请日：2022-09-21
发明人： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC分类号： H04N19/31 , H04N19/187 , H04N19/172 , H04N19/30 , H04N19/46 , H04N19/70
CPC分类号： H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
摘要： Methods and systems for frame rate scalability are described. Support is provided for input and output video sequences with variable frame rate and variable shutter angle across scenes, or for input video sequences with fixed input frame rate and input shutter angle, but allowing a decoder to generate a video output at a different output frame rate and shutter angle than the corresponding input values. Techniques allowing a decoder to decode more computationally-efficiently a specific backward compatible target frame rate and shutter angle among those allowed are also presented.
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公开(公告)号：US20230199224A1
公开(公告)日：2023-06-22
申请号：US17996207
申请日：2021-04-21
发明人： Sean Thomas McCarthy , Peng Yin , Walter J. Husak
摘要： Methods, systems, and bitstream syntax are described for constrained processing in video coding. Using one or more syntax elements and either explicit or implicit signaling, an encoder may signal to compliant decoders that certain features of the main profile, such as subpictures and multi-layered scalable coding, are disabled.
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公开(公告)号：US20230120882A1
公开(公告)日：2023-04-20
申请号：US17992603
申请日：2022-11-22
发明人： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
摘要： In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.
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