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    In-Loop Adaptive Wiener Filter for Video Coding and Decoding
    43.
    发明申请
    In-Loop Adaptive Wiener Filter for Video Coding and Decoding 审中-公开
    用于视频编码和解码的环路自适应维纳滤波器

    公开(公告)号：US20140098866A1

    公开(公告)日：2014-04-10

    申请号：US14104028

    申请日：2013-12-12

    Applicant: Yi-Jen Chiu ,  Lidong Xu

    Inventor： Yi-Jen Chiu ,  Lidong Xu

    IPC: H04N7/26

    CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/157 ,  H04N19/17 ,  H04N19/172 ,  H04N19/176 ,  H04N19/177 ,  H04N19/18 ,  H04N19/182 ,  H04N19/61 ,  H04N19/65 ,  H04N19/82 ,  H04N19/86

    Abstract: A video encoder may use an adaptive Wiener filter inside the core video encoding loop to improve coding efficiency. In one embodiment, the Wiener filter may be on the input to a motion estimation unit and, in another embodiment, it may be on the output of a motion compensation unit. The taps for the Wiener filter may be determined based on characteristics of at least a region of pixel intensities within a picture. Thus, the filtering may be adaptive in that it varies based on the type of video being processed.

    Abstract translation: 视频编码器可以在核心视频编码环路内使用自适应维纳滤波器来提高编码效率。 在一个实施例中，维纳滤波器可以在运动估计单元的输入上，并且在另一个实施例中，其可以在运动补偿单元的输出上。 用于维纳滤波器的抽头可以基于图像内的像素强度的至少一个区域的特性来确定。 因此，滤波可以是适应性的，因为它根据正在处理的视频的类型而变化。

    Methods and apparatus for adaptively choosing a search range for motion estimation
    45.
    发明授权
    Methods and apparatus for adaptively choosing a search range for motion estimation 有权
    用于自适应地选择运动估计的搜索范围的方法和装置

    公开(公告)号：US08462852B2

    公开(公告)日：2013-06-11

    申请号：US12582061

    申请日：2009-10-20

    Applicant: Lidong Xu ,  Yi-Jen Chiu

    Inventor： Lidong Xu ,  Yi-Jen Chiu

    IPC: H04N7/50

    CPC classification number: H04N19/139 ,  H04N5/144 ,  H04N19/513 ,  H04N19/521 ,  H04N19/56 ,  H04N19/57

    Abstract: Systems, methods, and computer program products that can be used to determine a search range (SR) when performing motion estimation at, for example, a video encoder or decoder. Determining a motion vector for a current block during motion estimation may involve searching within a search window that may reside in a reference frame, or in a previously decoded block that spatially or temporally neighbors the current block. Such a search seeks a motion vector that minimizes a metric, such as a sum of absolute differences between corresponding blocks of reference frames. A motion vector that minimizes such a metric may be a good candidate for use in motion estimation. The search may become more efficient if a search range is determined such that the extent of the search is bounded. A search range may be determined at the block level or at the picture level.

    Abstract translation: 当在例如视频编码器或解码器上执行运动估计时，可用于确定搜索范围（SR）的系统，方法和计算机程序产品。 在运动估计期间确定当前块的运动矢量可以涉及在可能驻留在参考帧中的搜索窗口内或在空间上或时间上邻近当前块的先前解码的块中进行搜索。 这样的搜索寻找使度量最小化的运动矢量，诸如对应的参考帧块之间的绝对差的和。 使这种度量最小化的运动矢量可能是用于运动估计的良好候选。 如果确定搜索范围使得搜索范围有界，则搜索可能变得更有效。 可以在块级别或图片级别确定搜索范围。

    Power Efficient Motion Estimation Techniques for Video Encoding
    47.
    发明申请
    Power Efficient Motion Estimation Techniques for Video Encoding 有权
    用于视频编码的高效运动估计技术

    公开(公告)号：US20130022126A1

    公开(公告)日：2013-01-24

    申请号：US13638628

    申请日：2010-03-31

    Applicant: Lidong Xu ,  Yi-Jen Chiu ,  Hong Jiang

    Inventor： Lidong Xu ,  Yi-Jen Chiu ,  Hong Jiang

    IPC: H04N7/28 ,  H04N7/32

    CPC classification number: H04N19/53 ,  H04N19/105 ,  H04N19/109 ,  H04N19/174 ,  H04N19/176 ,  H04N19/187 ,  H04N19/30 ,  H04N19/33 ,  H04N19/37 ,  H04N19/57 ,  H04N19/573 ,  H04N19/61

    Abstract: Adaptive control can use hierarchical motion estimation (HME) and/or multiple reference motion estimation (MRME) for the motion estimation of current encoding blocks. Both HME and MRME are allowed in the motion estimation to achieve a high coding gain. Control consists of slice level control and macro-block (MB) level control. A slice is one or more contiguous macroblocks. In slice level control, it is decided to use only one reference frame or use multiple reference frames to coding current slice based on the motion vectors obtained in coarse level motion estimation. In MB level control, it is decided to perform MRME or perform HME for the MB and its subblocks based on the coarse level motion vectors of the MB.

    Abstract translation: 自适应控制可以对当前编码块的运动估计使用分层运动估计（HME）和/或多参考运动估计（MRME）。 在运动估计中允许HME和MRME两者实现高编码增益。 控制由片级控制和宏块（MB）级控制组成。 切片是一个或多个连续的宏块。 在片级控制中，决定仅使用一个参考帧或者使用多个参考帧来基于在粗略级运动估计中获得的运动矢量对当前片进行编码。 在MB级别控制中，决定执行MRME或基于MB的粗略级别运动向量对MB及其子块执行HME。

    SYSTEM AND METHOD FOR LOW COMPLEXITY MOTION VECTOR DERIVATION
    48.
    发明申请
    SYSTEM AND METHOD FOR LOW COMPLEXITY MOTION VECTOR DERIVATION 审中-公开
    用于低复杂运动矢量衍生的系统和方法

    公开(公告)号：US20120294370A1

    公开(公告)日：2012-11-22

    申请号：US13575233

    申请日：2011-04-01

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

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

    IPC: H04N7/32

    CPC classification number: H04N19/44 ,  H04N19/513 ,  H04N19/533 ,  H04N19/56

    Abstract: A system and method for performing candidate-based decoder-side motion vector determination (DMVD). Candidate motion vectors (MVs) may be rounded to the nearest whole or integer pixel. The rounded candidate MV having the best sum of absolute differences (SAD) may be identified. This may be used as the final MV. Alternatively, the un-rounded MV corresponding to this rounded candidate MV may be used as the final MV. Alternatively, a small range integer search may be performed around the chosen rounded candidate MV, and the best integer pixel in the search area may be identified and used to define the final MV. Alternatively, an intermediate MV may be chosen, where this MV is intermediate between the chosen rounded candidate MV and the MV corresponding to the best integer pixel in the search area.

    Abstract translation: 一种用于执行基于候选的解码器侧运动矢量确定（DMVD）的系统和方法。 候选运动矢量（MV）可以舍入到最接近的整数或整数像素。 可以识别具有最佳绝对差（SAD）之和的舍入候选MV。 这可以用作最终的MV。 或者，可以将与该舍入候选MV相对应的未舍入的MV用作最终MV。 或者，可以围绕所选择的舍入候选MV执行小范围整数搜索，并且可以识别搜索区域中的最佳整数像素并用于定义最终MV。 或者，可以选择中间MV，其中该MV在所选择的舍入候选MV和对应于搜索区域中的最佳整数像素的MV之间。

    In-Loop Adaptive Wiener Filter for Video Coding and Decoding
    49.
    发明申请
    In-Loop Adaptive Wiener Filter for Video Coding and Decoding 有权
    用于视频编码和解码的环路自适应维纳滤波器

    公开(公告)号：US20120219059A1

    公开(公告)日：2012-08-30

    申请号：US13466243

    申请日：2012-05-08

    Applicant: Yi-Jen Chiu ,  Lidong Xu

    Inventor： Yi-Jen Chiu ,  Lidong Xu

    IPC: H04N7/26 ,  H04N7/32

    CPC classification number: H04N19/117 ,  H04N19/136 ,  H04N19/157 ,  H04N19/17 ,  H04N19/172 ,  H04N19/176 ,  H04N19/177 ,  H04N19/18 ,  H04N19/182 ,  H04N19/61 ,  H04N19/65 ,  H04N19/82 ,  H04N19/86

    Abstract: A video encoder may use an adaptive Wiener filter inside the core video encoding loop to improve coding efficiency. In one embodiment, the Wiener filter may be on the input to a motion estimation unit and, in another embodiment, it may be on the output of a motion compensation unit. The taps for the Wiener filter may be determined based on characteristics of at least a region of pixel intensities within a picture. Thus, the filtering may be adaptive in that it varies based on the type of video being processed.

    Abstract translation: 视频编码器可以在核心视频编码环路内使用自适应维纳滤波器来提高编码效率。 在一个实施例中，维纳滤波器可以在运动估计单元的输入上，并且在另一个实施例中，其可以在运动补偿单元的输出上。 用于维纳滤波器的抽头可以基于图像内的像素强度的至少一个区域的特性来确定。 因此，滤波可以是适应性的，因为它根据正在处理的视频的类型而变化。

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