公开(公告)号：US20190058892A1

公开(公告)日：2019-02-21

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：US20180131938A1

公开(公告)日：2018-05-10

申请号：US15564185

申请日：2016-04-19

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

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

IPC: H04N19/126 ,  H04N19/186 ,  H04N19/85 ,  G06T5/00

CPC classification number: H04N19/126 ,  G06T5/009 ,  G06T2207/20208 ,  H04N9/67 ,  H04N19/186 ,  H04N19/85

Abstract: In a method to improve the coding efficiency of high-dynamic range images coded in a perceptually quantized IPT color space (IPT-PQ), the values of the chroma components (P/T) of an input signal in IPT-PQ color space are divided by a factor of two before being encoded with standard-based encoders, such as AVC or HEVC; thus better matching the covariance characteristics of YCbCr signals. In addition, the order of the P and T chroma components may be swapped and the sign of the T chroma component may be inverted. Color transformation matrices for efficient forward and backward reshaping in the IPT-PQ color space are provided.

公开(公告)号：US20170295382A1

公开(公告)日：2017-10-12

申请号：US15481015

申请日：2017-04-06

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Guan-Ming SU ,  Qian CHEN ,  Tao CHEN ,  David BROOKS ,  Samir N. HULYALKAR ,  Peng YIN

IPC: H04N19/98 ,  H04N19/31 ,  H04N19/50

CPC classification number: H04N19/98 ,  H04N19/31 ,  H04N19/33 ,  H04N19/50 ,  H04N19/70

Abstract: A processor for video coding receives a full-frame rate (FFR) HDR video signal and a corresponding FFR SDR video signal. An encoder generates a scalable bitstream that allows decoders to generate half-frame-rate (HFR) SDR, FFR SDR, HFR HDR, or FFR HDR signals. Given odd and even frames of the input FFR SDR signal, the scalable bitstream combines a base layer of coded even SDR frames with an enhancement layer of coded packed frames, where each packed frame includes a downscaled odd SDR frame, a downscaled even HDR residual frame, and a downscaled odd HDR residual frame. In an alternative implementation, the scalable bitstream combines four signals layers: a base layer of even SDR frames, an enhancement layer of odd SDR frames, a base layer of even HDR residual frames and an enhancement layer of odd HDR residual frames. Corresponding decoder architectures are also presented.

公开(公告)号：US20250063202A1

公开(公告)日：2025-02-20

申请号：US18940641

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：US20250005068A1

公开(公告)日：2025-01-02

申请号：US18729174

申请日：2022-12-19

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Guan-Ming SU ,  Tao CHEN ,  Sheng QU ,  Samir N. HULYALKAR

IPC: G06F16/41 ,  G06F16/25

Abstract: Embodiments described herein provide a unified container format for delivering different multimedia applications. One embodiment provides a data structure utilized for implementing a plurality of multimedia applications. The data structure includes a first metadata level including low-level metadata used to perform operations associated with media data in a bitstream. The data structure includes a second metadata level including mid-level metadata used to apply operation metadata to render the media data. The data structure includes a third metadata level including upper-level metadata used to utilize the low-level metadata and the mid-level metadata to deliver the plurality of multimedia applications. The first metadata level further includes synchronization metadata for converting the media data, the low-level metadata, the mid-level metadata, and the upper-level metadata from a first multimedia application of the plurality of multimedia applications to a second multimedia application of the plurality of multimedia applications.

公开(公告)号：US20240214611A1

公开(公告)日：2024-06-27

申请号：US18596515

申请日：2024-03-05

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：US20240214610A1

公开(公告)日：2024-06-27

申请号：US18596494

申请日：2024-03-05

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：US20240007678A1

公开(公告)日：2024-01-04

申请号：US18470353

申请日：2023-09-19

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

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

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/30 ,  H04N19/85 ,  G06T5/00

CPC classification number: H04N19/70 ,  H04N19/186 ,  H04N19/30 ,  H04N19/85 ,  G06T5/007 ,  G06T2207/20208

Abstract: In a method to improve the coding efficiency of high-dynamic range (HDR) images, a decoder parses sequence processing set (SPS) data from an input coded bitstream to detect that an HDR extension syntax structure is present in the parsed SPS data. It extracts from the HDR extension syntax structure post-processing information that includes one or more of a color space enabled flag, a color enhancement enabled flag, an adaptive_reshaping_enabled_flag, a dynamic range conversion flag, a color correction enabled flag, or an SDR_viewable_flag. It decodes the input bitstream to generate a preliminary output decoded signal, and generates a second output signal based on the preliminary output signal and the post-processing information.

公开(公告)号：US20220174297A1

公开(公告)日：2022-06-02

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：US20220166991A1

公开(公告)日：2022-05-26

申请号：US17666887

申请日：2022-02-08

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.