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    Tiling in video encoding and decoding
    81.
    发明授权
    Tiling in video encoding and decoding 有权

    公开(公告)号：US10432958B2

    公开(公告)日：2019-10-01

    申请号：US16393371

    申请日：2019-04-24

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Purvin Bibhas Pandit ,  Peng Yin ,  Dong Tian

    IPC: H04N19/00 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70 ,  H04N19/597 ,  H04N13/194 ,  H04N19/172 ,  H04N19/182 ,  H04N13/161 ,  H04N13/111

    Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.

    Tiling in video encoding and decoding
    82.
    发明授权
    Tiling in video encoding and decoding 有权

    公开(公告)号：US10298948B2

    公开(公告)日：2019-05-21

    申请号：US16144971

    申请日：2018-09-27

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Purvin Bibhas Pandit ,  Peng Yin ,  Dong Tian

    IPC: H04N19/00 ,  H04N19/46 ,  H04N19/182 ,  H04N19/172 ,  H04N13/161 ,  H04N13/194 ,  H04N19/597 ,  H04N19/70 ,  H04N19/61 ,  H04N13/111

    Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.

    Hardware Efficient Sparse FIR Filtering in Video Codec
    85.
    发明申请
    Hardware Efficient Sparse FIR Filtering in Video Codec 有权
    视频编解码器中的硬件高效稀疏FIR滤波

    公开(公告)号：US20150092847A1

    公开(公告)日：2015-04-02

    申请号：US14488415

    申请日：2014-09-17

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Guan-Ming Su ,  Qian Chen ,  Peng Yin ,  Sheng Qu

    IPC: H04N19/82

    CPC classification number: H04N19/33 ,  H04N19/85 ,  H04N19/86

    Abstract: In an embodiment, a control map of false contour filtering is generated for a predicted image. The predicted image is predicted from a low dynamic range image mapped from the wide dynamic range image. Based at least in part on the control map of false contour filtering and the predicted image, one or more filter parameters for a sparse finite-impulse-response (FIR) filter are determined. The sparse FIR filter is applied to filter pixel values in a portion of the predicted image based at least in part on the control map of false contour filtering. The control map of false contour filtering is encoded into a part of a multi-layer video signal that includes the low dynamic range image.

    Abstract translation: 在一个实施例中，为预测图像生成假轮廓过滤的控制图。 从宽动态范围图像映射的低动态范围图像预测预测图像。 至少部分地基于假轮廓过滤的控制图和预测图像，确定稀疏有限脉冲响应（FIR）滤波器的一个或多个滤波器参数。 稀疏FIR滤波器被应用于至少部分地基于假轮廓过滤的控制图来对预测图像的一部分中的像素值进行滤波。 假轮廓过滤的控制图被编码成包括低动态范围图像的多层视频信号的一部分。

    Piecewise Cross Color Channel Predictor
    86.
    发明申请
    Piecewise Cross Color Channel Predictor 有权
    分段交叉颜色通道预测器

    公开(公告)号：US20140369409A1

    公开(公告)日：2014-12-18

    申请号：US14370674

    申请日：2013-01-23

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Guan-Ming Su ,  Sheng Qu ,  Peng Yin

    IPC: H04N19/593 ,  H04N19/186 ,  H04N19/182

    CPC classification number: H04N19/186 ,  H04N19/119 ,  H04N19/14 ,  H04N19/194 ,  H04N19/593

    Abstract: A sequence of visual dynamic range (VDR) images may be encoded using a standard dynamic range (SDR) base layer and one or more enhancement layers. A prediction image is generated by using piecewise cross-color channel prediction (PCCC), wherein a color channel in the SDR input may be segmented into two or more color channel segments and each segment is assigned its own cross-color channel predictor to derive a predicted output VDR image. PCCC prediction models may include first order, second order, or higher order parameters. Using a minimum mean-square error criterion, a closed form solution is presented for the prediction parameters for a second-order PCCC model. Algorithms for segmenting the color channels into multiple color channel segments are also presented.

    Abstract translation: 可以使用标准动态范围（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。 通过使用分段交叉色信道预测（PCCC）生成预测图像，其中SDR输入中的彩色通道可以被分割成两个或更多个颜色通道段，并且每个段被分配其自己的交叉颜色通道预测器以导出 预测输出VDR图像。 PCCC预测模型可以包括一阶，二阶或更高阶参数。 使用最小均方误差准则，给出了二阶PCCC模型的预测参数的闭合形式解。 还给出了将颜色通道分割成多个颜色通道段的算法。

    METADATA-AIDED REMOVAL OF FILM GRAIN
    87.
    发明申请
    METADATA-AIDED REMOVAL OF FILM GRAIN 有权

    公开(公告)号：US20250126302A1

    公开(公告)日：2025-04-17

    申请号：US18857373

    申请日：2023-04-18

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Guan-Ming Su ,  Peng Yin ,  Tsung-Wei Huang

    IPC: H04N19/86 ,  H04N19/44 ,  H04N19/80

    Abstract: A metadata-aided film-grain removal method and corresponding apparatus. An example embodiment enables a video decoder to substantially fully remove the film grain from a digital video signal that has undergone lossy video compression and then video decompression. Different embodiments may rely only on spatial-domain grain-removal processing, only on temporal-domain grain-removal processing, or on a combination of spatial-domain and temporal-domain grain-removal processing. Both spatial-domain and temporal-domain grain-removal processing may use metadata provided by the corresponding video encoder, the metadata including one or more parameters corresponding to the digital film grain injected into the host video at the encoder. Different film-grain-injection formats can be accommodated by the video decoder using signal preprocessing directed at supplying, to the film-grain removal module of the video decoder, an input compatible with the film-grain removal method implemented therein.

    Source color volume information messaging
    89.
    发明授权
    Source color volume information messaging 有权

    公开(公告)号：US12177488B2

    公开(公告)日：2024-12-24

    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.

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