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公开(公告)号：US12108061B2
公开(公告)日：2024-10-01
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：US20240244271A1
公开(公告)日：2024-07-18
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：US12015793B1
公开(公告)日：2024-06-18
申请号：US18410975
申请日：2024-01-11
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：US11979589B2
公开(公告)日：2024-05-07
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：US11877000B2
公开(公告)日：2024-01-16
申请号：US17629093
申请日：2020-08-05
发明人： Taoran Lu , Fangjun Pu , Peng Yin , Sean Thomas McCarthy , Tao Chen
IPC分类号： H04N19/513 , H04N19/105 , H04N19/172 , H04N19/33
CPC分类号： H04N19/513 , H04N19/105 , H04N19/172 , H04N19/33
摘要： Methods and systems for canvas size scalability across the same or different bitstream layers of a video coded bitstream are described. Offset parameters for a conformance window, a reference region of interest (ROI) in a reference layer, and a current ROI in a current layer are received. The width and height of a current ROI and a reference ROI are computed based on the offset parameters and they are used to generate a width and height scaling factor to be used by a reference picture resampling unit to generate an output picture based on the current ROI and the reference ROI.
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公开(公告)号：US11800151B2
公开(公告)日：2023-10-24
申请号：US17581827
申请日：2022-01-21
发明人： Peng Yin , Taoran Lu , Fangjun Pu , Tao Chen , Walter J. Husak
IPC分类号： H04N19/70 , H04N19/186 , H04N19/30 , H04N19/85 , G06T5/00
CPC分类号： H04N19/70 , G06T5/007 , H04N19/186 , H04N19/30 , H04N19/85 , G06T2207/20208
摘要： In a method to improve the coding efficiency of high-dynamic range (HDR) images, a decoder parses sequence processing set (SPS) data from an input coded bitstream to detect that an HDR extension syntax structure is present in the parsed SPS data. It extracts from the HDR extension syntax structure post-processing information that includes one or more of a color space enabled flag, a color enhancement enabled flag, an adaptive reshaping enabled flag, a dynamic range conversion flag, a color correction enabled flag, or an SDR viewable flag. It decodes the input bitstream to generate a preliminary output decoded signal, and generates a second output signal based on the preliminary output signal and the post-processing information.
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公开(公告)号：US11729400B2
公开(公告)日：2023-08-15
申请号：US17334631
申请日：2021-05-28
发明人： Peng Yin , Guan-Ming Su , Taoran Lu , Tao Chen , Walter J. Husak
IPC分类号： H04N19/50 , H04N19/167 , H04N19/117 , H04N19/124 , H04N19/17 , H04N19/132 , H04N19/182 , H04N19/60 , H04N19/70 , H04L43/16
CPC分类号： H04N19/167 , H04L43/16 , H04N19/117 , H04N19/124 , H04N19/132 , H04N19/17 , H04N19/182 , H04N19/649 , H04N19/70
摘要： Sample data and metadata related to spatial regions in images may be received from a coded video signal. It is determined whether specific spatial regions in the images correspond to a specific region of luminance levels. In response to determining the specific spatial regions correspond to the specific region of luminance levels, signal processing and video compression operations are performed on sets of samples in the specific spatial regions. The signal processing and video compression operations are at least partially dependent on the specific region of luminance levels.
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公开(公告)号：US11570455B2
公开(公告)日：2023-01-31
申请号：US17673646
申请日：2022-02-16
IPC分类号： H04N19/33 , H04N19/105 , H04N19/59 , H04N19/80
摘要： The precision of up-sampling operations in a layered coding system is preserved when operating on video data with high bit-depth. In response to bit-depth requirements of the video coding or decoding system, scaling and rounding parameters are determined for a separable up-scaling filter. Input data are first filtered across a first spatial direction using a first rounding parameter to generate first up-sampled data. First intermediate data are generated by scaling the first up-sampled data using a first shift parameter. The intermediate data are then filtered across a second spatial direction using a second rounding parameter to generate second up-sampled data. Second intermediate data are generated by scaling the second up-sampled data using a second shift parameter. Final up-sampled data may be generated by clipping the second intermediate data.
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公开(公告)号：US11523127B2
公开(公告)日：2022-12-06
申请号：US17281380
申请日：2020-03-11
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
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：US11284095B2
公开(公告)日：2022-03-22
申请号：US17206843
申请日：2021-03-19
IPC分类号： H04N19/33 , H04N19/105 , H04N19/59 , H04N19/80
摘要： The precision of up-sampling operations in a layered coding system is preserved when operating on video data with high bit-depth. In response to bit-depth requirements of the video coding or decoding system, scaling and rounding parameters are determined for a separable up-scaling filter. Input data are first filtered across a first spatial direction using a first rounding parameter to generate first up-sampled data. First intermediate data are generated by scaling the first up-sampled data using a first shift parameter. The intermediate data are then filtered across a second spatial direction using a second rounding parameter to generate second up-sampled data. Second intermediate data are generated by scaling the second up-sampled data using a second shift parameter. Final up-sampled data may be generated by clipping the second intermediate data.
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