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公开(公告)号：US11594159B2
公开(公告)日：2023-02-28
申请号：US17421972
申请日：2020-01-09
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Robin Atkins , Craig Todd , Jaclyn Anne Pytlarz , Timo Kunkel
Abstract: A display apparatus, a display management module and a method for ambient light compensation are described. The display management module is configured to receive an input video signal comprising a sequence of video frames and to determine whether a current video frame of the sequence of video frames immediately follows a scene change. The display management module is further configured to adjust ambient light compensation applied to the input signal in dependence on the signal indicative of intensity of ambient light only in response to determining that the current video frame of the sequence of video frames immediately follows a scene change.
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公开(公告)号：US11361699B2
公开(公告)日：2022-06-14
申请号：US17276752
申请日：2019-09-17
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Jaclyn Anne Pytlarz
Abstract: Methods and systems for mapping images from a first dynamic range to a second dynamic on a target display with power limitations are described. Given: an input image in a first dynamic range, input metadata (Smin, Smid, Smax), power-independent luminance characteristics of a target display (Tmin, reference Tmax), and an APL function of the target display, wherein the APL function determines output luminance in the target display as a function of average picture level (APL) input in the target display, a processor generates an adaptive output of the maximum luminance level for the target display (Tmax) so that when mapping the image from the first dynamic range to the second dynamic range, the anchor points of the tone-mapping function are adjusted according to the APL function of the target display.
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公开(公告)号：US11277543B1
公开(公告)日：2022-03-15
申请号：US17319483
申请日：2021-05-13
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Jaclyn Anne Pytlarz , Robert Wanat
Abstract: In a method for dithering image data, a processor receives an input image in a first color space and a first bit depth larger than 8 bits. The processor converts the input image into a first image in a perceptually uniform color space, such as the BT. 2100 ICtCp color space, with pixel values scaled to be within a target bit depth, it quantizes the first image to generate a quantized image, it generates an error image between the first image and the quantized image, and using a random threshold, it generates a dithered image based on the random threshold, the error image, and the quantized image, allowing to reduce the bit-depth representation for visually consistent reproduction by two bits.
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公开(公告)号：US10930223B2
公开(公告)日：2021-02-23
申请号：US16345192
申请日：2017-12-20
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Jaclyn Anne Pytlarz , Robin Atkins , Gopi Lakshminarayanan , Hariharan Ganapathy Kathirvelu
IPC: G09G3/34
Abstract: Methods are disclosed for ambient light-adaptive display management. Given an input image, image metadata, an ambient-light signal, and parameters characterizing a target display, a processor generates an ambient-light adjustment function which maps input luminance values in a reference viewing environment to output luminance values in a target viewing environment, wherein the target viewing environment is determined based on the ambient-light signal. The ambient-light adjustment function is applied to the input image and the input metadata to generate a virtual image and new metadata. A tone-mapping function based on the new metadata and target display parameters is applied to the virtual image to generate an output image. The parameters for the target display are computed based on the ambient-light signal, global dimming metadata, and the luminance characteristics of the target display.
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公开(公告)号：US20240314364A1
公开(公告)日：2024-09-19
申请号：US18678794
申请日：2024-05-30
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：US11979615B1
公开(公告)日：2024-05-07
申请号：US17992616
申请日：2022-11-22
Applicant: DOLBY LABORATORIES LICENSING CORPORATION
Inventor： Robin Atkins , Peng Yin , Taoran Lu , Jaclyn Anne Pytlarz
CPC classification number: H04N19/87 , H04N1/6058 , H04N9/67 , 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：US11875719B2
公开(公告)日：2024-01-16
申请号：US17611072
申请日：2020-05-12
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Jaclyn Anne Pytlarz , Elizabeth G. Pieri , Robin Atkins
IPC: G09G3/20 , G09G5/10 , G09G5/06 , H04N1/60 , G09G5/02 , H04N5/57 , H04N9/67 , H04N9/69 , H04N9/73
CPC classification number: G09G3/2003 , G09G5/10 , G09G2320/0666 , G09G2320/0693 , G09G2340/02 , G09G2340/06 , G09G2354/00
Abstract: Two corresponding color patches are displayed on two image displays until adjusted by a viewer to match visually to a common color. Two sets of code values rendered on the two corresponding color patches on the two image displays are identified. Two sets of tristimulus values for the viewer are determined based on the two sets of code values rendered on the two corresponding color patches on the two image displays. The viewer's color matching function are generated based on the two sets of tristimulus values. The viewer's CMF is used in image rendering operations on a target image display.
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公开(公告)号：US11837140B2
公开(公告)日：2023-12-05
申请号：US17996210
申请日：2021-04-16
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Jake William Zuena , Jaclyn Anne Pytlarz , Robin Atkins
CPC classification number: G09G3/2003 , G09G5/02 , G09G2320/0666 , G09G2340/06 , G09G2360/144 , G09G2360/16
Abstract: Methods and systems for chromatic ambient-light support are provided. Given an input surround correlated color temperature (CCT), its normalized value is mapped to a preferred gray CCT value using a sigmoid-like function model generated based on viewer experimental data. The preferred gray CCT value is then mapped to an adjusted CCT value so that viewing conditions on a display with the input surround CCT value match a D65 surround CCT value.
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公开(公告)号：US20230345055A1
公开(公告)日：2023-10-26
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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公开(公告)号：US20230196963A1
公开(公告)日：2023-06-22
申请号：US17996210
申请日：2021-04-16
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Jake William Zuena , Jaclyn Anne Pytlarz , Robin Atkins
CPC classification number: G09G3/2003 , G09G5/02 , G09G2320/0666 , G09G2340/06 , G09G2360/144
Abstract: Methods and systems for chromatic ambient-light support are provided. Given an input surround correlated color temperature (CCT), its normalized value is mapped to a preferred gray CCT value using a sigmoid-like function model generated based on viewer experimental data. The preferred gray CCT value is then mapped to an adjusted CCT value so that viewing conditions on a display with the input surround CCT value match a D65 surround CCT value.
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