公开(公告)号：US20150222916A1

公开(公告)日：2015-08-06

申请号：US14687534

申请日：2015-04-15

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Guan-Ming SU ,  Sheng QU ,  Peng YIN

IPC: H04N19/44 ,  H04N19/14 ,  H04N19/186 ,  H04N19/105

CPC classification number: H04N19/33 ,  H04N19/105 ,  H04N19/14 ,  H04N19/154 ,  H04N19/182 ,  H04N19/186 ,  H04N19/44 ,  H04N19/503

Abstract: A sequence of visual dynamic range (VDR) images is encoded using a standard dynamic range (SDR) base layer and one or more enhancement layers. A predicted VDR image is generated from an SDR input by using a weighted, multi-band, cross-color channel prediction model. Exponential weights with an adaptable decay parameter for each band are also presented.

Abstract translation: 使用标准动态范围（SDR）基础层和一个或多个增强层对视觉动态范围（VDR）图像序列进行编码。 通过使用加权的多频带交叉颜色信道预测模型从SDR输入生成预测的VDR图像。 还给出了每个频带具有适应衰减参数的指数权重。

公开(公告)号：US20250063203A1

公开(公告)日：2025-02-20

申请号：US18721054

申请日：2022-12-19

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Guan-Ming SU ,  Harshad KADU ,  Peng YIN

IPC: H04N19/80 ,  H04N19/85

Abstract: Methods, systems, and bitstream syntax are described for metadata signaling and film-grain parameter adaptation based on a viewing environment which may differ from a reference environment. Example adaptation models are provided for viewing parameters that include: ambient room illumination, viewing distance, and pixels per inch in a target display. Example systems include a single reference viewing environment model and a multi-reference viewing environment model supporting adaptation of film-grain model parameters via adaptation functions or interpolation.

公开(公告)号：US20250063201A1

公开(公告)日：2025-02-20

申请号：US18940599

申请日：2024-11-07

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao CHEN ,  Peng YIN ,  Taoran LU ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

Abstract: Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the minimum, average, and maximum luminance values in the source data. Messaging data signaling an active region in each picture may also be included.

公开(公告)号：US20240388738A1

公开(公告)日：2024-11-21

申请号：US18787909

申请日：2024-07-29

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao CHEN ,  Peng YIN ,  Taoran LU ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

Abstract: Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the minimum, average, and maximum luminance values in the source data. Messaging data signaling an active region in each picture may also be included.

公开(公告)号：US20240171775A1

公开(公告)日：2024-05-23

申请号：US18550425

申请日：2022-05-16

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Guan-Ming SU ,  Peng YIN

IPC: H04N19/597 ,  G06T7/11 ,  G06T17/00

CPC classification number: H04N19/597 ,  G06T7/11 ,  G06T17/00

Abstract: An input 3D point cloud including a spatial distribution of points is received. Patches including pre-reshaped patch data are generated from the input 3D point cloud. Encoder-side reshaping is performed on the pre-reshaped patch data to generate reshaped patch data for the patches. The reshaped patch data is encoded into a 3D video signal, which a recipient device of the 3D video signal can decode to generate a reconstructed 3D point cloud that approximates the input 3D point cloud.

公开(公告)号：US20230171434A1

公开(公告)日：2023-06-01

申请号：US18162492

申请日：2023-01-31

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao CHEN ,  Peng YIN ,  Taoran LU ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

CPC classification number: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

Abstract: Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the minimum, average, and maximum luminance values in the source data. Messaging data signaling an active region in each picture may also be included.

公开(公告)号：US20210368212A1

公开(公告)日：2021-11-25

申请号：US17282523

申请日：2019-10-02

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Qing SONG ,  Neeraj J. GADGIL ,  Guan-Ming SU ,  Peng YIN ,  Arun RAJ

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/189 ,  H04N19/182

Abstract: Methods and systems for reducing banding artifacts when displaying high-dynamic-range images reconstructed from coded reshaped images are described. Given an input image in a high dyna mic range (HDR) which is mapped to a second image in a second dynamic range, banding artifacts in a reconstructed HDR image generated using the second image are reduced by a) in darks and mid-tone regions of the input image, adding noise to the input image before being mapped to the second image, and b) in highlights regions of the input image, modifying an input backward reshaping function, wherein the modified backward reshaping function will be used by a decoder to map a decoded version of the second image to the reconstructed HDR image. An example noise generation technique using simulated film-grain noise is provided.

公开(公告)号：US20210289212A1

公开(公告)日：2021-09-16

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: H04N19/167 ,  H04N19/117 ,  H04N19/124 ,  H04N19/17 ,  H04N19/132 ,  H04N19/182 ,  H04N19/60 ,  H04N19/70 ,  H04L12/26

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.

公开(公告)号：US20200045340A1

公开(公告)日：2020-02-06

申请号：US16339992

申请日：2017-10-03

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao CHEN ,  Peng YIN ,  Taoran LU ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/14 ,  H04N19/20

Abstract: Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the Messaging data signaling an active region in each picture may also be included.

公开(公告)号：US20200029078A1

公开(公告)日：2020-01-23

申请号：US16495812

申请日：2018-03-21

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Fangjun PU ,  Taoran LU ,  Peng YIN ,  Tao CHEN

IPC: H04N19/124 ,  H04N19/186

Abstract: Methods for quantization parameter (QP) prediction are presented. In a coded bitstream that includes QP values, instead of simply embedding all delta QP values in the bitstream, the bitstream may include QP-related syntax elements that allow a decoder to reconstruct the delta QP values using luma-based QP prediction. Encoding and decoding bitstream examples are provided where delta QP values may be predicted using information from just the luminance values of the prediction blocks of the current block or by additional luminance information from its known neighbors (e.g., from the left or above blocks) and a base QP value.