公开(公告)号：US10977809B2

公开(公告)日：2021-04-13

申请号：US16214632

申请日：2018-12-10

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu Choudhury ,  Robin Atkins ,  Tao Chen

IPC: G06T7/11 ,  G06T7/13 ,  G06T7/155 ,  G06T7/194 ,  G06T7/254 ,  G06T7/40 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/46 ,  H04N19/543

Abstract: Motion characteristics related to foreground objects and background regions bordering the foreground objects in images are determined. A frame rate conversion (FRC)-related metadata portion is generated based on the motion characteristics. The FRC-related metadata portion is to be used for determining an optimal FRC operational mode with a downstream device for the images. The images are encoded into a video stream. The FRC-related metadata portion is encoded into the video stream as a part of image metadata. The video stream is caused to be transmitted to the downstream device.

公开(公告)号：US20250095125A1

公开(公告)日：2025-03-20

申请号：US18291578

申请日：2022-07-22

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Robert Wanat ,  Anustup Kumar Atanu Choudhury ,  Robin Atkins

IPC: G06T5/92 ,  G06V10/60 ,  G06V10/75

Abstract: Methods and systems for dynamic range conversion and display mapping of standard dynamic range (SDR) images onto high dynamic range (HDR) displays are described. Given an SDR input image, a processor generates an intensity (luminance) image and optionally a base layer image and a detail layer image. A first neural network uses the intensity image to predict statistics of the SDR image in a higher dynamic range. These predicted statistics together with the original image statistics of the input image are used to derive an optimal tone-mapping curve to map the input SDR image onto an HDR display. Optionally, a second neural network, using the intensity image and the detail layer image, can generate a residual detail layer image in a higher dynamic range to enhance the tone-mapping of the base layer image into the higher dynamic range.

公开(公告)号：US20180082429A1

公开(公告)日：2018-03-22

申请号：US15703764

申请日：2017-09-13

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu Choudhury ,  Tao Chen ,  Robin Atkins ,  Samir N. Hulyalkar

IPC: G06T7/207 ,  H04N21/235 ,  H04N21/2343 ,  G06T7/246

CPC classification number: G06T7/207 ,  G06T7/248 ,  G06T2207/10016 ,  G06T2207/10024 ,  H04N7/0127 ,  H04N21/2343 ,  H04N21/234381 ,  H04N21/2353 ,  H04N21/2401

Abstract: Motion characteristics related to the images are determined. A motion characteristics metadata portion is generated based on the motion characteristics, and is to be used for determining an optimal FRC operational mode with a downstream device for the images. The images are encoded into a video stream. The motion characteristics metadata portion is encoded into the video stream as a part of image metadata. The video stream is transmitted to the downstream device. The downstream receives the video stream and operates the optimal FRC operational mode to generate, based on the images, additional images. The images and the additional images are rendered on a display device at an image refresh rate different from an input image refresh rate represented by images encoded in the video stream.

公开(公告)号：US12283023B1

公开(公告)日：2025-04-22

申请号：US18846430

申请日：2023-03-17

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Shruthi Suresh Rotti ,  Anustup Kumar Atanu Choudhury

IPC: G06T3/40 ,  G06T3/4046 ,  G06T3/4053

Abstract: Methods and systems for the super resolution of high dynamic range (HDR) video are described. Given a sequence of video frames, a current frame and two or more neighboring frames are processed by a neural-network (NN) feature extraction module, followed by a NN upscaling module, and a NN reconstruction module. In parallel, the current frame is upscaled using traditional up-sampling to generate an intermediate up-sampled frame. The output of the reconstruction module is added to the intermediate up-sampled frame to generate an output frame. Additional traditional up-sampling may be performed on the output frame to match the desired up-scaling factor, beyond the up-scaling factor for which the neural network was trained.

公开(公告)号：US10354394B2

公开(公告)日：2019-07-16

申请号：US15703764

申请日：2017-09-13

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu Choudhury ,  Tao Chen ,  Robin Atkins ,  Samir N. Hulyalkar

IPC: H04N19/102 ,  H04N19/11 ,  H04N19/114 ,  H04N19/137 ,  H04N19/139 ,  H04N19/157 ,  G06T7/207 ,  H04N21/235 ,  H04N21/2343 ,  G06T7/246 ,  H04N7/01 ,  H04N21/24

Abstract: Motion characteristics related to the images are determined. A motion characteristics metadata portion is generated based on the motion characteristics, and is to be used for determining an optimal FRC operational mode with a downstream device for the images. The images are encoded into a video stream. The motion characteristics metadata portion is encoded into the video stream as a part of image metadata. The video stream is transmitted to the downstream device. The downstream receives the video stream and operates the optimal FRC operational mode to generate, based on the images, additional images. The images and the additional images are rendered on a display device at an image refresh rate different from an input image refresh rate represented by images encoded in the video stream.

公开(公告)号：US11776099B2

公开(公告)日：2023-10-03

申请号：US17344843

申请日：2021-06-10

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Robert Wanat ,  Robin Atkins ,  Anustup Kumar Atanu Choudhury ,  Scott Daly ,  Jaclyn Anne Pytlarz

IPC: G06T7/00 ,  G06T5/00 ,  G06T5/50

CPC classification number: G06T7/0002 ,  G06T5/002 ,  G06T5/50 ,  G06T7/97 ,  G06T2207/10024 ,  G06T2207/20024 ,  G06T2207/20224 ,  G06T2207/30168

Abstract: Methods and systems for generating an image quality metric are described. A reference and a test image are first converted to the ITP color space. After calculating difference images ΔI, ΔT, and ΔP, using the color channels of the two images, the difference images are convolved with low pass filters, one for the I channel and one for the chroma channels (I or P). The image quality metric is computed as a function of the sum of squares of filtered ΔI, ΔT, and ΔP values. The chroma low-pass filter is designed to maximize matching the image quality metric with subjective results.

公开(公告)号：US11336895B2

公开(公告)日：2022-05-17

申请号：US16640332

申请日：2018-09-05

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Anustup Kumar Atanu Choudhury ,  Robin Atkins ,  Thaddeus Beier ,  Ali Zandifar ,  Ian Godin

IPC: H04N19/136 ,  H04N19/186 ,  H04N19/70

Abstract: A method for generating metadata for use by a video decoder for displaying video content encoded by a video encoder includes: (1) accessing a target tone mapping curve; (2) accessing a decoder tone curve corresponding to a tone curve used by the video decoder for tone mapping the video content; (3) generating a plurality of parameters of a trim-pass function used by the video decoder to apply after applying the decoder tone curve to the video content, wherein the parameters of the trim-pass function are generated to approximate the target tone curve with the combination of the trim-pass function and the decoder tone curve, and (4) generating the metadata for use by the video decoder, including said plurality of parameters of the trim-pass function.