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    DETECTION OF THE PRESENCE OF TELEVISION SIGNALS EMBEDDED IN NOISE USING CYCLOSTATIONARY TOOLBOX
    17.
    发明申请
    DETECTION OF THE PRESENCE OF TELEVISION SIGNALS EMBEDDED IN NOISE USING CYCLOSTATIONARY TOOLBOX 有权
    使用循环工具箱检测噪声中嵌入的电视信号的存在

    公开(公告)号：US20100157066A1

    公开(公告)日：2010-06-24

    申请号：US12160445

    申请日：2007-01-16

    申请人： Kiran Challapali ,  Bin Dong ,  Dagnachew Birru

    发明人： Kiran Challapali ,  Bin Dong ,  Dagnachew Birru

    IPC分类号： H04N17/00

    CPC分类号： H04N5/08 ,  H04N5/21 ,  H04N5/4401 ,  H04N5/46 ,  H04N21/42607

    摘要： A method for detecting the presence of a television signal embedded in a received signal including the television signal and noise is disclosed. Either first-order or second order cyclostationary property of the signals may be used for their detection. When the first-order cyclostationary property is used, the following method is used, the method comprising the steps of upsampling the received signal by a factor of N, performing a synchronous averaging of a set of M segments of the upsampled received signal, performing an autocorrelation of the signal; and detecting the presence of peaks in the output of the autocorrelation function. When the second order cyclostationary property of the signal is used, the method comprising the steps of delaying the received signal by a fixed delay (symbol time), multiplying the received signal with the delayed version, looking for a tone (single frequency) in the output.

    摘要翻译： 公开了一种用于检测嵌入在包括电视信号和噪声的接收信号中的电视信号的存在的方法。 信号的一阶或二阶循环平稳性可以用于它们的检测。 当使用一阶循环平稳性时，使用以下方法，该方法包括以下步骤：对接收到的信号进行上采样乘以N，对上采样的接收信号的一组M段执行同步平均， 信号的自相关; 并检测在自相关函数的输出中存在峰值。 当使用信号的二阶循环平稳性时，该方法包括以下步骤：将接收到的信号延迟固定延迟（符号时间），将接收到的信号与延迟版本相乘，在接收到的信号中寻找音调（单频） 输出。

    System for detecting redundant images in a video sequence by comparing two predetermined threshold values
    18.
    发明授权
    System for detecting redundant images in a video sequence by comparing two predetermined threshold values 失效
    用于通过比较两个预定阈值来检测视频序列中的冗余图像的系统

    公开(公告)号：US06298090B1

    公开(公告)日：2001-10-02

    申请号：US09090594

    申请日：1998-06-04

    申请人： Kiran Challapali ,  Yingwei Chen

    发明人： Kiran Challapali ,  Yingwei Chen

    IPC分类号： H04N718

    CPC分类号： H04N19/587 ,  H04N19/132

    摘要： A system for detecting redundant images in a video sequence includes dividing a target image in the video sequence into a plurality of regions, and determining, for each of the plurality of regions, a local value comprising a sum of differences between individual pixels of each region and corresponding pixels in at least one other image in the video sequence. The local value for each of the plurality of regions is then compared to a first predetermined threshold. The system also includes determining a global value comprising a sum of differences between substantially all pixels in the target image and corresponding pixels in the at least one other image, and comparing the global value to a second predetermined threshold. An indication that the target image is redundant is then output in a case that the local value does not exceed the first predetermined threshold for all regions, and the global value does not exceed the second predetermined threshold.

    摘要翻译： 一种用于检测视频序列中的冗余图像的系统，包括将视频序列中的目标图像划分为多个区域，并且针对多个区域中的每一个确定包括每个区域的各个像素之间的差异之和的局部值 以及视频序列中的至少一个其他图像中的对应像素。 然后将多个区域中的每一个的局部值与第一预定阈值进行比较。 该系统还包括确定包括目标图像中的基本上所有像素与至少一个其它图像中的相应像素之间的差的总和，并将全局值与第二预定阈值进行比较的全局值。 然后在本地值不超过所有区域的第一预定阈值并且全局值不超过第二预定阈值的情况下输出目标图像是冗余的指示。