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    Methods and systems to estimate motion based on reconstructed reference frames at a video decoder
    81.
    发明授权
    Methods and systems to estimate motion based on reconstructed reference frames at a video decoder 有权
    基于视频解码器上重建的参考帧估计运动的方法和系统

    公开(公告)号：US08917769B2

    公开(公告)日：2014-12-23

    申请号：US12566823

    申请日：2009-09-25

    Applicant: Lidong Xu ,  Yi-Jen Chiu ,  Wenhao Zhang

    Inventor： Lidong Xu ,  Yi-Jen Chiu ,  Wenhao Zhang

    IPC: H04N7/12 ,  H04N19/51 ,  H04N19/61 ,  H04N19/44 ,  H04N19/57

    CPC classification number: H04N19/577 ,  H04N19/103 ,  H04N19/137 ,  H04N19/139 ,  H04N19/172 ,  H04N19/44 ,  H04N19/513 ,  H04N19/52 ,  H04N19/57 ,  H04N19/573 ,  H04N19/61

    Abstract: Methods and systems to apply motion estimation (ME) based on reconstructed reference pictures in a B frame or in a P frame at a video decoder. For a P frame, projective ME may be performed to obtain a motion vector (MV) for a current input block. In a B frame, both projective ME and mirror ME may be performed to obtain an MV for the current input block. The ME process can be performed on sub-partitions of the input block, which may reduce the prediction error without increasing the amount of MV information in the bitstream. Decoder-side ME can be applied for the prediction of existing inter frame coding modes, and traditional ME or the decoder-side ME can be adaptively selected to predict a coding mode based on a rate distribution optimization (RDO) criterion.

    Abstract translation: 基于在B帧或视频解码器的P帧中的重建参考图像应用运动估计（ME）的方法和系统。 对于P帧，可以执行投影ME以获得当前输入块的运动矢量（MV）。 在B帧中，可以执行投射ME和镜ME两者以获得当前输入块的MV。 可以在输入块的子分区上执行ME处理，这可以在不增加比特流中的MV信息的量的情况下减少预测误差。 解码器端ME可以应用于现有的帧间编码模式的预测，并且传统的ME或解码器侧的ME可以被自适应地选择以基于速率分布优化（RDO）准则来预测编码模式。

    COLOR GAMUT SCALABILITY TECHNIQUES
    87.
    发明申请
    COLOR GAMUT SCALABILITY TECHNIQUES 审中-公开
    彩色游戏可扩展性技术

    公开(公告)号：US20140079134A1

    公开(公告)日：2014-03-20

    申请号：US13784978

    申请日：2013-03-05

    Applicant: Yi-Jen Chiu ,  Hong Jiang ,  Lidong Xu ,  Ya-Ti Peng

    Inventor： Yi-Jen Chiu ,  Hong Jiang ,  Lidong Xu ,  Ya-Ti Peng

    IPC: H04N9/64 ,  H04N7/30

    CPC classification number: H04N9/64 ,  H04N1/64 ,  H04N19/186 ,  H04N19/30 ,  H04N19/60

    Abstract: Techniques are described that can be used to either compress or expand video. Color compression techniques are described that can be used to compress the wide color gamut content into lower color gamut for inclusion in a baseline layer. Color expansion techniques are described that convert lower color gamut data into wider color gamut format for inclusion in an enhancement layer. Both of the baseline video stream and enhancement layer video streams may be transmitted through a channel or stored in a memory device to be viewed later. Accordingly, both baseline and enhancement video layers are available so that either lower or higher quality displays can be used to display video.

    Abstract translation: 描述了可用于压缩或扩展视频的技术。 描述了可用于将宽色域内容压缩成较低色域以包括在基线层中的彩色压缩技术。 描述了将较低色域数据转换成更宽的色域格式以包含在增强层中的颜色展开技术。 基线视频流和增强层视频流都可以通过信道发送或存储在存储设备中，以便稍后观看。 因此，基线和增强视频层都可用，以便可以使用较低或较高质量的显示器来显示视频。

    Adaptive contrast adjustment techniques
    89.
    发明授权
    Adaptive contrast adjustment techniques 有权
    自适应对比度调整技术

    公开(公告)号：US08639031B2

    公开(公告)日：2014-01-28

    申请号：US13074257

    申请日：2011-03-29

    Applicant: Ya-Ti Peng ,  Yi-Jen Chiu

    Inventor： Ya-Ti Peng ,  Yi-Jen Chiu

    IPC: G06K9/00 ,  G06K9/40

    CPC classification number: G06T5/40 ,  G06K9/38 ,  G06T2207/10016 ,  G06T2207/10024

    Abstract: Techniques are disclosed involving contrast adjustment for images. For example, an input image is classified based on its pixel value characteristics, as expressed in an input brightness histogram. From such a classification, a target histogram distribution for a corresponding output image (i.e., a contrast-adjusted transformation of the input image) may be specified. With the target histogram of the output image specified, a transformation function may be derived that maps input image values to output image values. Moreover, transitions of such transformation functions may be smoothed. Such smoothing may provide advantages, such as a reduction in flickering associated with video data.

    Abstract translation: 公开了涉及图像的对比度调整的技术。 例如，输入图像根据输入亮度直方图所表示的像素值特性进行分类。 根据这样的分类，可以规定对应的输出图像的目标直方图分布（即输入图像的对比度调整变换）。 利用指定的输出图像的目标直方图，可以导出将输入图像值映射到输出图像值的变换函数。 此外，这种变换函数的转换可以被平滑化。 这种平滑可以提供诸如减少与视频数据相关联的闪烁的优点。

    LOW MEMORY ACCESS MOTION VECTOR DERIVATION
    90.
    发明申请
    LOW MEMORY ACCESS MOTION VECTOR DERIVATION 审中-公开
    低存储器访问运动矢量派生

    公开(公告)号：US20130287111A1

    公开(公告)日：2013-10-31

    申请号：US13976778

    申请日：2011-06-29

    Applicant: Lidong Xu ,  Yi-Jen Chiu ,  Wenhao Zhang

    Inventor： Lidong Xu ,  Yi-Jen Chiu ,  Wenhao Zhang

    IPC: H04N7/36

    CPC classification number: H04N19/513 ,  H04N19/44 ,  H04N19/57

    Abstract: Systems, devices and methods for performing low memory access candidate-based decoder-side motion vector determination (DMVD) are described. The number of candidate motion vectors (MVs) searched may be confined by limiting the range of pixels associated with candidate MVs to a pre-defined window. Reference windows may then be loaded into memory only once for both DMVD and motion compensation (MC) processing. Reference window size may be adapted to different PU sizes. Further, various schemes are described for determining reference window positions.

    Abstract translation: 描述用于执行低存储器访问候选的解码器侧运动矢量确定（DMVD）的系统，设备和方法。 搜索的候选运动矢量（MV）的数量可以通过将与候选MV相关联的像素的范围限制为预定窗口来限制。 然后，对于DMVD和运动补偿（MC）处理，参考窗口可以仅被加载到存储器中一次。 参考窗口尺寸可以适应不同的PU尺寸。 此外，描述了用于确定参考窗口位置的各种方案。

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