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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
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Peng Yin , Guan-Ming Su , Taoran Lu , Tao Chen , Walter J. Husak
IPC: H04N19/50 , H04N19/167 , H04N19/117 , H04N19/124 , H04N19/17 , H04N19/132 , H04N19/182 , H04N19/60 , H04N19/70 , H04L43/16
CPC classification number: H04N19/167 , H04L43/16 , H04N19/117 , H04N19/124 , H04N19/132 , H04N19/17 , H04N19/182 , H04N19/649 , H04N19/70
Abstract: 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
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
IPC: H04N19/33 , H04N19/105 , H04N19/59 , H04N19/80
Abstract: 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
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
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：US11284095B2
公开(公告)日：2022-03-22
申请号：US17206843
申请日：2021-03-19
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
IPC: H04N19/33 , H04N19/105 , H04N19/59 , H04N19/80
Abstract: 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：US20220038723A1
公开(公告)日：2022-02-03
申请号：US17281380
申请日：2020-03-11
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: H04N19/30 , H04N19/172 , H04N19/46 , H04N19/187 , 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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Patent Agency Ranking
公开(公告)号：US10992941B2
公开(公告)日：2021-04-27
申请号：US16619074
申请日：2018-06-29
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Taoran Lu , Fangjun Pu , Peng Yin , Tao Chen , Walter J. Husak
IPC: H04N19/159 , H04N19/124 , H04N19/182 , H04N19/44
Abstract: Given a sequence of images in a first codeword representation, methods, processes, and systems are presented for integrating reshaping into a next generation video codec for encoding and decoding the images, wherein reshaping allows part of the images to be coded in a second codeword representation which allows more efficient compression than using the first codeword representation. A variety of architectures are discussed, including: an out-of-loop reshaping architecture, an in-loop-for intra pictures only reshaping architecture, an in-loop architecture for prediction residuals, and a hybrid in-loop reshaping architecture. Syntax methods for signaling reshaping parameters, and image-encoding methods optimized with respect to reshaping are also presented.
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公开(公告)号：US20200382802A1
公开(公告)日：2020-12-03
申请号：US16901911
申请日：2020-06-15
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
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：US10728549B2
公开(公告)日：2020-07-28
申请号：US16180775
申请日：2018-11-05
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Peng Yin , Taoran Lu , Fangjun Pu , Tao Chen
IPC: H04N19/117 , H04N19/82 , H04N19/136
Abstract: Methods, processes, and systems are presented for adaptive loop filtering in coding and decoding high dynamic range (HDR) video. Given an input image block, its luminance information may be used to adapt one or more parameters of adaptive loop filtering and compute gradient and directionality information, activity information, a classification index, and adaptive-loop-filtering coefficients.
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公开(公告)号：US10516889B2
公开(公告)日：2019-12-24
申请号：US16168644
申请日：2018-10-23
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
IPC: H04N19/33 , H04N19/105 , H04N19/59 , H04N19/80
Abstract: 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：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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