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    INTEGRATED IMAGE RESHAPING AND VIDEO CODING
    2.
    发明公开
    INTEGRATED IMAGE RESHAPING AND VIDEO CODING 审中-公开

    公开(公告)号：US20240305791A1

    公开(公告)日：2024-09-12

    申请号：US18666734

    申请日：2024-05-16

    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

    CPC classification number: H04N19/159 ,  H04N19/124 ,  H04N19/182 ,  H04N19/45

    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 FOR HIGH DYNAMIC RANGE SIGNALS
    4.
    发明申请
    SIGNAL RESHAPING FOR HIGH DYNAMIC RANGE SIGNALS 有权

    公开(公告)号：US20210243478A1

    公开(公告)日：2021-08-05

    申请号：US17234816

    申请日：2021-04-20

    Applicant: Dolby Laboratories Licensing Corporation

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

    IPC: H04N19/87 ,  H04N19/46 ,  H04N19/98 ,  H04N19/85 ,  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.

    HIGH PRECISION UP-SAMPLING IN SCALABLE CODING OF HIGH BIT-DEPTH VIDEO
    5.
    发明申请
    HIGH PRECISION UP-SAMPLING IN SCALABLE CODING OF HIGH BIT-DEPTH VIDEO 审中-公开
    高精度高可靠度高可靠性编码的高精度视频高精度

    公开(公告)号：US20150350661A1

    公开(公告)日：2015-12-03

    申请号：US14649198

    申请日：2013-12-04

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Peng YIN ,  Taoran LU ,  Tao CHEN

    IPC: H04N19/33 ,  H04N19/105 ,  H04N19/59 ,  H04N19/80

    CPC classification number: 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.

    Abstract translation: 当对具有高位深度的视频数据进行操作时，分层编码系统中的上采样操作的精度将被保留。 响应于视频编码或解码系统的位深度要求，确定可分离的缩放滤波器的缩放和舍入参数。 首先使用第一舍入参数在第一空间方向上过滤输入数据，以生成第一上采样数据。 通过使用第一移位参数对第一上采样数据进行缩放来生成第一中间数据。 然后使用第二舍入参数在第二空间方向上过滤中间数据，以产生第二上采样数据。 通过使用第二移位参数对第二上采样数据进行缩放来生成第二中间数据。 可以通过限制第二中间数据来生成最终上采样数据。

    INTEGRATED IMAGE RESHAPING AND VIDEO CODING
    8.
    发明申请
    INTEGRATED IMAGE RESHAPING AND VIDEO CODING 有权

    公开(公告)号：US20230021624A1

    公开(公告)日：2023-01-26

    申请号：US17940819

    申请日：2022-09-08

    Applicant: Dolby Laboratories Licensing Corporation

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

    IPC: H04N19/159 ,  H04N19/124 ,  H04N19/44 ,  H04N19/182

    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.

    CANVAS SIZE SCALABLE VIDEO CODING
    9.
    发明申请
    CANVAS SIZE SCALABLE VIDEO CODING 有权

    公开(公告)号：US20220385935A1

    公开(公告)日：2022-12-01

    申请号：US17629093

    申请日：2020-08-05

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Taoran LU ,  Fangjun PU ,  Peng YIN ,  Sean Thomas MCCARTHY ,  Tao CHEN

    IPC: H04N19/513 ,  H04N19/33 ,  H04N19/105 ,  H04N19/172

    Abstract: Methods and systems for canvas size scalability across the same or different bitstream layers of a video coded bitstream are described. Offset parameters for a conformance window, a reference region of interest (ROI) in a reference layer, and a current ROI in a current layer are received. The width and height of a current ROI and a reference ROI are computed based on the offset parameters and they are used to generate a width and height scaling factor to be used by a reference picture resampling unit to generate an output picture based on the current ROI and the reference ROI.

    SIGNAL RESHAPING AND CODING FOR HDR AND WIDE COLOR GAMUT SIGNALS
    10.
    发明申请
    SIGNAL RESHAPING AND CODING FOR HDR AND WIDE COLOR GAMUT SIGNALS 有权

    公开(公告)号：US20210274222A1

    公开(公告)日：2021-09-02

    申请号：US17203698

    申请日：2021-03-16

    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

    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.

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