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公开(公告)号：US12120358B2
公开(公告)日：2024-10-15
申请号：US18678794
申请日：2024-05-30
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：US12096038B2
公开(公告)日：2024-09-17
申请号：US18162492
申请日：2023-01-31
发明人： Tao Chen , Peng Yin , Taoran Lu , Walter J. Husak
IPC分类号： H04N19/70 , H04N19/14 , H04N19/186 , H04N19/20
CPC分类号： H04N19/70 , H04N19/14 , H04N19/186 , H04N19/20
摘要： Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the minimum, average, and maximum luminance values in the source data. Messaging data signaling an active region in each picture may also be included.
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公开(公告)号：US20240283978A1
公开(公告)日：2024-08-22
申请号：US18567333
申请日：2022-06-27
IPC分类号： H04N19/70
CPC分类号： H04N19/70
摘要： Methods, systems, and bitstream syntax are described for determining the processing order of metadata messaging, such as supplemental enhancement information (SEI) messaging in MPEG video coding.
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公开(公告)号：US20240251093A1
公开(公告)日：2024-07-25
申请号：US18616841
申请日：2024-03-26
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：US12041275B1
公开(公告)日：2024-07-16
申请号：US18616959
申请日：2024-03-26
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：US12028555B2
公开(公告)日：2024-07-02
申请号：US18405874
申请日：2024-01-05
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：US20240171760A1
公开(公告)日：2024-05-23
申请号：US18430444
申请日：2024-02-01
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：US20240080465A1
公开(公告)日：2024-03-07
申请号：US18508088
申请日：2023-11-13
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 , H04N19/172 , 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：US11870948B2
公开(公告)日：2024-01-09
申请号：US17925444
申请日：2021-05-26
发明人： Robin Atkins , Ian Godin , Peng Yin
IPC分类号： H04N19/70 , H04N19/172 , H04N19/177 , H04N21/4402 , H04N19/167
CPC分类号： H04N19/70 , H04N19/167 , H04N19/172 , H04N19/177 , H04N21/440281
摘要： Metadata and methods for variable-frame rate (VFR) video playback are presented. Proposed metadata include syntax parameters related to the presentation time duration, picture source type (e.g., original, duplicate, or interpolated), picture position in a scene (e.g., first, last, or in the middle), and motion-related information with respect to a previous picture. A decoder may use these metadata to apply appropriate frame-rate conversion techniques to reduce artifacts during VFR playback.
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公开(公告)号：US11856232B2
公开(公告)日：2023-12-26
申请号：US17613801
申请日：2020-05-27
发明人： Fangjun Pu , Toaran Lu , Peng Yin , Sean Thomas McCarthy
IPC分类号： H04N19/70 , H04N19/172 , H04N19/186 , H04N19/46
CPC分类号： H04N19/70 , H04N19/172 , H04N19/186 , H04N19/46
摘要： A quantization parameter signalling mechanism for both SDR and HDR content in video coding is described using two approaches. The first approach is to send the user-defined QpC table directly in high level syntax. This leads to more flexible and efficient QP control for future codec development and video content coding. The second approach is to signal luma and chroma QPs independently. This approach eliminates the need for QpC tables and removes the dependency of chroma quantization parameter on luma QP.
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