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    Facsimile-based video compression method and system
    21.
    发明授权
    Facsimile-based video compression method and system 失效
    基于传真的视频压缩方法和系统

    公开(公告)号：US5740278A

    公开(公告)日：1998-04-14

    申请号：US606043

    申请日：1996-02-16

    Applicant: Toby Berger ,  Yi-Jen Chiu

    Inventor： Toby Berger ,  Yi-Jen Chiu

    IPC: G06T9/00 ,  H04N7/32 ,  H04N7/36 ,  H04N7/46 ,  G06K9/36 ,  H04N7/12

    CPC classification number: H04N19/00 ,  H04N19/503 ,  H04N19/507 ,  H04N19/587 ,  H04N19/59 ,  H04N19/93

    Abstract: A method and system for compressing and decompressing video image data in real time employs thresholding and facsimile-based encoding to eliminate the need for computationally intensive two-dimensional transform-based compression techniques. The method operates first by forming a difference frame which contains only information pertaining to the difference between a current video image frame and a computed approximation of the video image frame. The difference frame is fed to a thresholder which categorizes each pixel in the frame as being either in a first set having intensities above or at a preset threshold, or a second set having intensities below a preset threshold. A facsimile-based compression algorithm is then employed to encode the first set of above or at threshold pixel locations. To compress the intensity data for each above or at threshold pixel, a quantizer and lossless encoder are preferably employed, with the quantizer serving to categorize the intensities by groups, and the lossless encoder using conventional coding, such as Huffman coding, to compress the intensity data further. Various techniques may be employed with the embodiments of the invention to adjust the actual amount of compressed data generated by the method and system to accommodate communication lines with different data rate capabilities.

    Abstract translation: 用于实时压缩和解压缩视频图像数据的方法和系统采用阈值和基于传真的编码，以消除对基于计算密集型二维变换的压缩技术的需要。 该方法首先通过形成仅包含与当前视频图像帧和计算出的视频图像帧的近似之间的差异的信息的差分帧来操作。 差分帧被馈送到将帧中的每个像素分类为具有高于或处于预设阈值的强度的第一组的阈值器，或者具有低于预设阈值的强度的第二组。 然后采用基于传真的压缩算法对上述第一组或阈值像素位置进行编码。 为了压缩每个上述或阈值像素处的强度数据，优选地采用量化器和无损编码器，量化器用于按组分组强度，并且使用诸如霍夫曼编码的常规编码的无损编码器来压缩强度 数据进一步。 本发明的实施例可以采用各种技术来调整由方法和系统生成的压缩数据的实际量，以适应​​具有不同数据速率能力的通信线路。

    Systems, methods, and computer program products for scalable video coding based on coefficient sampling
    23.
    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

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

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

    IPC: H04N19/30

    CPC classification number: H04N19/63 ,  H04N19/30

    Abstract: 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.

    Object detection using motion estimation
    26.
    发明授权
    Object detection using motion estimation 有权
    使用运动估计的对象检测

    公开(公告)号：US09525803B2

    公开(公告)日：2016-12-20

    申请号：US13997092

    申请日：2011-12-30

    Applicant: Qiang Li ,  Jianguo Li ,  Yi-Jen Chiu ,  Ya-Ti Peng ,  Yangzhou Du

    Inventor： Qiang Li ,  Jianguo Li ,  Yi-Jen Chiu ,  Ya-Ti Peng ,  Yangzhou Du

    IPC: G06K9/00 ,  H04N5/14 ,  G06T7/20 ,  G06K9/32 ,  G06K9/62

    CPC classification number: H04N5/145 ,  G06K9/3216 ,  G06K9/3233 ,  G06K9/6267 ,  G06T7/223 ,  G06T7/248

    Abstract: Systems and methods of detecting an object using motion estimation may include a processor and motion estimation and object detection logic coupled to the processor. The motion estimation and object detection logic may be configured to include logic to detect an object in a frame of a video based on motion estimation. The video may include a first frame and a second frame. The motion estimation may be performed on a region of the second frame using sum of absolute difference between the region of the second frame and a corresponding region of the first frame.

    Abstract translation: 使用运动估计来检测对象的系统和方法可以包括耦合到处理器的处理器和运动估计和对象检测逻辑。 运动估计和对象检测逻辑可以被配置为包括基于运动估计来检测视频帧中的对象的逻辑。 视频可以包括第一帧和第二帧。 可以使用第二帧的区域和第一帧的对应区域之间的绝对差的和来在第二帧的区域上执行运动估计。

    ADAPTIVE MOTION INSTABILITY DETECTION IN VIDEO
    29.
    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

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

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

    IPC: G06K9/62 ,  H04N5/232

    CPC classification number: G06K9/6298 ,  H04N5/23267

    Abstract: 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.

    Abstract translation: 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。

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