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    Systems, methods, and computer program products for scalable video coding based on coefficient sampling
    22.
    发明授权
    Systems, methods, and computer program products for scalable video coding based on coefficient sampling 有权

    公开(公告)号：US09955154B2

    公开(公告)日：2018-04-24

    申请号：US13995182

    申请日：2012-06-29

    申请人： Wenhao Zhang ,  Yi-Jen Chiu ,  Lidong Xu ,  Yu Han ,  Hong Jiang

    发明人： Wenhao Zhang ,  Yi-Jen Chiu ,  Lidong Xu ,  Yu Han ,  Hong Jiang

    IPC分类号： H04N19/30

    CPC分类号： H04N19/63 ,  H04N19/30

    摘要： Methods, systems, and computer program products for the generation of multiple layers of scaled encoded video data compatible with the HEVC standard. Residue from prediction processing may be transformed into coefficients in the frequency domain. The coefficients may then be sampled to create a layer of encoded data. The coefficients may be sampled in different ways to create multiple respective layers. The layers may then be multiplexed and sent to a decoder. There, one or more of the layers may be chosen. The choice of certain layer(s) may be dependent on the desired attributes of the resulting video. A certain level of video quality, frame rate, resolution, and/or bit depth may be desired, for example. The coefficients in the chosen layers may then be assembled to create a version of the residue to be used in video decoding.

    ADAPTIVE MOTION INSTABILITY DETECTION IN VIDEO
    27.
    发明申请
    ADAPTIVE MOTION INSTABILITY DETECTION IN VIDEO 有权
    视频中的自适应运动不稳定性检测

    公开(公告)号：US20140355895A1

    公开(公告)日：2014-12-04

    申请号：US14218457

    申请日：2014-03-18

    申请人： Lidong Xu ,  Chen Wang ,  Yi-Jen Chiu ,  Jong Dae Oh ,  Heon-Mo Koo

    发明人： Lidong Xu ,  Chen Wang ,  Yi-Jen Chiu ,  Jong Dae Oh ,  Heon-Mo Koo

    IPC分类号： G06K9/62 ,  H04N5/232

    CPC分类号： G06K9/6298 ,  H04N5/23267

    摘要： One or more apparatus and method for adaptively detecting motion instability in video. In embodiments, video stabilization is predicated on adaptive detection of motion instability. Adaptive motion instability detection may entail determining an initial motion instability state associated with a plurality of video frames. Subsequent transitions of the instability state may be detected by comparing a first level of instability associated with a first plurality of the frames to a second level of instability associated with a second plurality of the frames. Image stabilization of received video frames may be toggled first based on the initial instability state, and thereafter based on detected changes in the instability state.Output video frames, which may be stabilized or non-stabilized, may then be stored to a memory. In certain embodiments, video motion instability is scored based on a probability distribution of video frame motion jitter values.

    摘要翻译： 一种或多种用于自适应地检测视频中的运动不稳定性的装置和方法。 在实施例中，视频稳定基于运动不稳定性的自适应检测。 自适应运动不稳定性检测可能需要确定与多个视频帧相关联的初始运动不稳定状态。 可以通过将与第一多个帧相关联的不稳定性的第一级别与与第二多个帧相关联的第二级不稳定性进行比较来检测不稳定状态的后续转换。 首先可以基于初始不稳定状态来切换所接收的视频帧的图像稳定性，然后基于检测到的不稳定状态的变化。 然后可以将稳定或不稳定的输出视频帧存储到存储器中。 在某些实施例中，基于视频帧运动抖动值的概率分布对视频运动不稳定性进行评分。

    Luma-based chroma intra prediction
    29.
    发明授权
    Luma-based chroma intra prediction 有权
    基于亮度的色度帧内预测

    公开(公告)号：US08724711B2

    公开(公告)日：2014-05-13

    申请号：US13512992

    申请日：2011-07-12

    申请人： Lidong Xu ,  Yu Han ,  Yi-Jen Chiu ,  Wenhao Zhang

    发明人： Lidong Xu ,  Yu Han ,  Yi-Jen Chiu ,  Wenhao Zhang

    IPC分类号： H04N7/12

    CPC分类号： H04N19/00569 ,  H04N19/105 ,  H04N19/11 ,  H04N19/186 ,  H04N19/61 ,  H04N19/82

    摘要： Systems, devices and methods for performing luma-based chroma ultra prediction are described. Down-sample filters may be applied to luma values of luma pixel positions to generate reconstructed luma values for chroma pixel positions in a prediction unit of an intra frame. The down-sampled reconstructed luma values may then be used to predict chroma values for the chroma pixel positions. In some implementations, a reconstructed luma value of a chroma position may be used to predict that position's chroma value. In other implementations, reconstructed luma values of neighboring chroma pixel positions may be analyzed to adaptively predict a chroma value for a chroma pixel position.

    摘要翻译： 描述了用于执行基于亮度的色度帧内预测的系统，设备和方法。 下采样滤波器可以应用于亮度像素位置的亮度值，以生成帧内预测单元中的色度像素位置的重建亮度值。 然后可以使用下采样的重构亮度值来预测色度像素位置的色度值。 在一些实现中，可以使用色度位置的重建亮度值来预测该位置的色度值。 在其他实现中，可以分析相邻色度像素位置的重建亮度值以自适应地预测色度像素位置的色度值。

    Rate-distortion cost reducing video encoding techniques
    30.
    发明授权
    Rate-distortion cost reducing video encoding techniques 有权
    速率失真成本降低视频编码技术

    公开(公告)号：US08625681B2

    公开(公告)日：2014-01-07

    申请号：US12217805

    申请日：2008-07-09

    申请人： Lidong Xu ,  Yi-Jen Chiu

    发明人： Lidong Xu ,  Yi-Jen Chiu

    IPC分类号： H04N1/409 ,  H04N5/217

    CPC分类号： H04N19/82 ,  H04N19/117 ,  H04N19/147 ,  H04N19/17 ,  H04N19/46 ,  H04N19/61

    摘要： Techniques are described that can be used to determine parameters of an adaptive Wiener filter to apply to a video region. The following parameters of the Wiener filter may be adjusted: coefficients, coefficient quantization, filter type, filter size, prediction mode, entropy encoding, and number of filter tables. The parameters associated with the lowest rate distortion cost of the encoder are selected for transmission with the encoded video. If not using adaptive Wiener filtering results in a lowest rate distortion cost, then adaptive Wiener filtering is not used for the video region. If using adaptive Wiener filtering results in a lowest rate distortion cost, then the parameters applied by the adaptive Wiener filtering that result in the lowest rate distortion cost are communicated with the filtered video region.

    摘要翻译： 描述了可以用于确定适用于视频区域的自适应维纳滤波器的参数的技术。 可以调整维纳滤波器的以下参数：系数，系数量化，滤波器类型，滤波器大小，预测模式，熵编码和滤波器表数。 选择与编码器的最低速率失真成本相关联的参数以便与编码视频一起传输。 如果不使用自适应维纳滤波导致最低速率失真成本，则视频区域不使用自适应维纳滤波。 如果使用自适应维纳滤波导致最低速率失真成本，则导致最低速率失真成本的自适应维纳滤波所应用的参数与滤波视频区域通信。