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    INTEGRATED IMAGE RESHAPING AND VIDEO CODING
    11.
    发明申请
    INTEGRATED IMAGE RESHAPING AND VIDEO CODING 审中-公开

    公开(公告)号：US20200267392A1

    公开(公告)日：2020-08-20

    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 ,  H04N19/182 ,  H04N19/124 ,  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.

    SIGNAL RESHAPING AND CODING FOR HDR AND WIDE COLOR GAMUT SIGNALS
    12.
    发明申请
    SIGNAL RESHAPING AND CODING FOR HDR AND WIDE COLOR GAMUT SIGNALS 审中-公开

    公开(公告)号：US20200162759A1

    公开(公告)日：2020-05-21

    申请号：US16710904

    申请日：2019-12-11

    Applicant: Dolby Laboratories Licensing Corporation

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

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

    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.

    Signal Reshaping for High Dynamic Range Signals
    13.
    发明申请
    Signal Reshaping for High Dynamic Range Signals 审中-公开

    公开(公告)号：US20180234704A1

    公开(公告)日：2018-08-16

    申请号：US15749231

    申请日：2016-08-03

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Robin ATKINS ,  Peng YIN ,  Taoran LU ,  Jaclyn Anne PYTLARZ

    IPC: H04N19/87 ,  H04N19/46 ,  H04N19/98 ,  H04N1/60

    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.

    SOURCE COLOR VOLUME INFORMATION MESSAGING
    15.
    发明申请
    SOURCE COLOR VOLUME INFORMATION MESSAGING 有权

    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.

    SOURCE COLOR VOLUME INFORMATION MESSAGING
    16.
    发明申请
    SOURCE COLOR VOLUME INFORMATION MESSAGING 有权

    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.

    SOURCE COLOR VOLUME INFORMATION MESSAGING
    19.
    发明申请
    SOURCE COLOR VOLUME INFORMATION MESSAGING 审中-公开

    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.

    QUANTIZATION PARAMETER PREDICTION USING LUMINANCE INFORMATION
    20.
    发明申请
    QUANTIZATION PARAMETER PREDICTION USING LUMINANCE INFORMATION 审中-公开

    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.

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