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公开(公告)号：US12200271B1
公开(公告)日：2025-01-14
申请号：US18899400
申请日：2024-09-27
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
Abstract: 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：US12108060B2
公开(公告)日：2024-10-01
申请号：US18477511
申请日：2023-09-28
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC: H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
CPC classification number: H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
Abstract: 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
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
CPC classification number: H04N19/87 , H04N1/6058 , H04N19/46 , H04N19/85 , H04N19/98 , G09G2320/06 , G09G2340/06
Abstract: 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
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC: H04N19/172 , H04N19/187 , H04N19/30 , H04N19/31 , H04N19/46 , H04N19/70
CPC classification number: H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
Abstract: 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
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
CPC classification number: H04N19/87 , H04N1/6058 , H04N19/46 , H04N19/85 , H04N19/98 , G09G2320/06 , G09G2340/06
Abstract: 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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Patent Agency Ranking
公开(公告)号：US11910025B1
公开(公告)日：2024-02-20
申请号：US18385724
申请日：2023-10-31
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
CPC classification number: H04N19/87 , H04N1/6058 , H04N19/46 , H04N19/85 , H04N19/98 , G09G2320/06 , G09G2340/06
Abstract: 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
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC: H04N19/31 , H04N19/187 , H04N19/172 , H04N19/30 , H04N19/46 , H04N19/70
CPC classification number: H04N19/31 , H04N19/187 , H04N19/172 , H04N19/30 , H04N19/46 , H04N19/70
Abstract: 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
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Fangjun Pu , Sean Thomas McCarthy , Walter J. Husak , Tao Chen , Guan-Ming Su
IPC: H04N19/31 , H04N19/187 , H04N19/172 , H04N19/30 , H04N19/46 , H04N19/70
CPC classification number: H04N19/31 , H04N19/172 , H04N19/187 , H04N19/30 , H04N19/46 , H04N19/70
Abstract: 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
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Sean Thomas McCarthy , Peng Yin , Walter J. Husak
Abstract: 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
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
Abstract: 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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