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

Inventor： Peng Yin ,  Taoran Lu ,  Tao Chen

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.

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.

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

Inventor： Peng Yin ,  Taoran Lu ,  Tao Chen

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.

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.

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.

公开(公告)号：US10977849B2

公开(公告)日：2021-04-13

申请号：US16674373

申请日：2019-11-05

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Timo Kunkel ,  Ning Xu ,  Tao Chen ,  Bongsun Lee ,  Samir N. Hulyalkar

IPC: G06T11/60 ,  H04N21/431 ,  H04N5/445 ,  H04N21/81 ,  H04N5/272 ,  H04N21/462 ,  G09G5/10 ,  G06T7/90 ,  G06K9/46 ,  G06K9/52 ,  G06K9/62 ,  H04N5/58 ,  H04N9/67 ,  H04N21/41 ,  H04N21/422 ,  H04N21/488 ,  G06F3/14

Abstract: Systems and methods for overlaying a second image/video data onto a first image/video data are described herein. The first image/video data may be intended to be rendered on a display with certain characteristics—e.g., HDR, EDR, VDR or UHD capabilities. The second image/video data may comprise graphics, closed captioning, text, advertisement—or any data that may be desired to be overlaid and/or composited onto the first image/video data. The second image/video data may be appearance mapped according to the image statistics and/or characteristics of the first image/video data. In addition, such appearance mapping may be made according to the characteristics of the display that the composite data is to be rendered. Such appearance mapping is desired to render a composite data that is visually pleasing to a viewer, rendered upon a desired display.

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.

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.

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

Inventor： Peng Yin ,  Taoran Lu ,  Tao Chen

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.

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.