公开(公告)号：US07680655B2

公开(公告)日：2010-03-16

申请号：US11134188

申请日：2005-05-20

申请人： Ronald Jay Canniff ,  Michael R. Kosek ,  Alan Howard Matten ,  Harvey P. Siy ,  Peng Zhang

发明人： Ronald Jay Canniff ,  Michael R. Kosek ,  Alan Howard Matten ,  Harvey P. Siy ,  Peng Zhang

IPC分类号： G10L15/20

CPC分类号： G10L25/69

摘要： A method and apparatus are provided for determining the quality of a speech transmission, including temporal clipping, delay and jitter, using a carefully constructed test signal (300) and digital signal processing techniques. The test signal that is to be transmitted through a speech transmission system (100) is created (700). Then the test signal is transmitted through the speech transmission system such that the speech transmission system creates an output signal that corresponds to the input signal, as modified by the speech transmission system (702). The test signal includes multiple segments (500) of speech signals interleaved with periods of silence. The periods of silence vary in duration according to a predefined pattern. Each segment of speech signals includes multiple predefined speech samples or symbols (400, 402, 404, 406, 408, 410, 412, 414) interleaved with a plurality of silence gaps. The speech samples have a common period of duration, but the silence gaps do not. The output signal from the speech transmission system is preferably recorded (704) and analyzed to determine its quality, including temporal clipping (706). This analysis preferably includes comparing the output signal with a reference signal derived from the test signal using a cross correlation function. A processor (114) coupled to memory (116) records and analyzes the output signal.

摘要翻译： 提供了一种使用仔细构造的测试信号（300）和数字信号处理技术来确定语音传输质量的方法和装置，包括时间限幅，延迟和抖动。 创建要通过语音传输系统（100）发送的测试信号（700）。 然后，通过语音传输系统发送测试信号，使得语音传输系统创建对应于由语音传输系统（702）修改的输入信号的输出信号。 测试信号包括与沉默周期交错的多个语音信号段（500）。 静音期间根据预定义的模式在持续时间内变化。 每个语音信号段包括与多个静音间隙交织的多个预定义语音样本或符号（400,402,404,406,408,410,412,414）。 言语样本有一个共同的持续时间，但是沉默的空白却没有。 来自语音传输系统的输出信号优选地被记录（704）并被分析以确定其质量，包括时间限幅（706）。 该分析优选地包括使用互相关函数将输出信号与从测试信号导出的参考信号进行比较。 耦合到存储器（116）的处理器（114）记录和分析输出信号。

公开(公告)号：US5686922A

公开(公告)日：1997-11-11

申请号：US692573

申请日：1996-08-06

申请人： Herbert C. Stankwitz ,  Michael R. Kosek

发明人： Herbert C. Stankwitz ,  Michael R. Kosek

IPC分类号： G01S13/90 ,  G01S13/00

CPC分类号： G01S13/9035

摘要： In systems wherein signal compression is performed using matched filters or transforms, as in the case of radar, multiple extrapolations are used to resolve beyond the limits of defraction. In one example, development of the method begins with a complex, uniformly weighted SAR or inverse SAR signal represented by a rectangle function. After performing an FFT, adaptive sidelobe reduction is carried out followed by an inverse weighting and truncation, after which the original signal is used to replace the center portion of the extrapolated signal. The signal is again transformed and sidelobe reduced, and inverse weighting and truncation are again performed, followed by the original data replacement step. The extrapolation procedure may be repeated end times, extrapolating each time by a factor K for a total extrapolation factor of K=k.sup.n.

摘要翻译： 在使用匹配的滤波器或变换进行信号压缩的系统中，如在雷达的情况下，使用多个外插来超越衰减极限。 在一个示例中，该方法的开发以由矩形函数表示的复杂均匀加权的SAR或反SAR信号开始。 在执行FFT之后，执行自适应旁瓣减少，随后进行逆加权和截断，之后使用原始信号来代替外推信号的中心部分。 该信号被再次变换并且旁瓣减小，并且再次执行反加权和截断，随后是原始数据替换步骤。 外推程序可以是重复的结束时间，对于总外推因子K = kn，每次外推K因子K。