公开(公告)号：US5583784A

公开(公告)日：1996-12-10

申请号：US241851

申请日：1994-05-12

申请人： Rolf Kapust ,  Dieter Seltzer

发明人： Rolf Kapust ,  Dieter Seltzer

IPC分类号： G10L25/27 ,  G10L25/48 ,  H04B1/66 ,  G10L5/00 ,  G10L7/02 ,  G10L9/00

CPC分类号： H04B1/665 ,  G10L25/48 ,  G10L25/27

摘要： A frequency analysis method comprises using a window function to evaluate aemporal input signal present in the form of discrete sampled values. The windowed input signal is subsequently subjected to Fourier transformation for the purpose of generating a set of coefficients. In order to develop such a method so that the characteristics of the human ear are simulated not only with respect to the spectral projection in the frequency range, but also with respect to the resolution in the temporal range, a set of different window functions is used to evaluate a block of the input signal in order to generate a set of blocks, weighted with the respective window functions, of sampled values whose Fourier transforms have different bandwidths, before each of the simultaneously generated blocks of sampled values is subjected to a dedicated Fourier transformation in such a way that for each window function at least respectively one coefficient is calculated which is assigned the bandwidth of the Fourier transforms of this window function, and that the coefficients are chosen such that the frequency bands assigned to them essentially adjoin one another.

摘要翻译： 频率分析方法包括使用窗口函数来评估以离散采样值的形式存在的时间输入信号。 随后，窗口化的输入信号经历傅里叶变换，以产生一组系数。 为了开发这样的方法，使得不仅相对于频率范围内的光谱投影而且对于时间范围内的分辨率来模拟人耳的特性，所以使用一组不同的窗函数 为了评估输入信号的块，以便在每个采样值的每个同时产生的采样值块经受专用傅里叶变换之前，生成一组利用各个窗口函数加权的块，其中傅立叶变换具有不同带宽的采样值 以这样的方式进行变换，使得对于每个窗口函数，至少分别计算一个被分配了该窗口函数的傅立叶变换的带宽的系数，并且选择这些系数使得分配给它们的频带基本上彼此相邻。

公开(公告)号：US5014318A

公开(公告)日：1991-05-07

申请号：US439394

申请日：1989-10-25

申请人： Hartmut Schott ,  Dieter Seitzer ,  Heinz Gerhauser ,  Karlheinz Brandenburg ,  Ernst Eberlein ,  Stefan Krageloh ,  Rolf Kapust ,  Harald Popp

发明人： Hartmut Schott ,  Dieter Seitzer ,  Heinz Gerhauser ,  Karlheinz Brandenburg ,  Ernst Eberlein ,  Stefan Krageloh ,  Rolf Kapust ,  Harald Popp

IPC分类号： G10L11/00 ,  G10L21/02 ,  G11B20/18 ,  H04B14/04 ,  H04H20/88

CPC分类号： H04H20/88 ,  H04B14/04

摘要： Disclosed is an apparatus for checking audio signal processing systems. The apparatus has the following features:the apparatus is provided with a first input connection, to which the input signal of the audio processing system to be checked is transmitted, a second input connection, to which the output signal of said system is transmitted, and a signal processor.said signal processor ascertains the signal delay time of said system to be checked by means of correlating said signals received at said two input connections,said signal processor always composes the difference signal from said signal received at said first input connection during a specific time span and said signal received at said second input connection, lagging by the signal delay time,said signal processor ascertains the spectral composition of said signal received at said first input connection during said specific time span and of said respective difference signal,said signal processor ascertains the hearing threshold of the human ear from said spectral composition and compares the ascertained hearing threshold with the respective difference signal.

摘要翻译： PCT No.PCT / DE89 / 00110 Sec。 371日期：1989年10月25日 102（e）日期1989年10月25日PCT提交1989年2月25日PCT公布。 公开号WO89 / 08357 日期为1989年9月8日。公开是用于检查音频信号处理系统的装置。 该装置具有以下特征：该装置具有第一输入连接，待检查的音频处理系统的输入信号被发送到该第一输入连接，传输所述系统的输出信号的第二输入连接;以及 信号处理器。 所述信号处理器通过将在所述两个输入连接处接收到的所述信号相关来确定要检查的所述系统的信号延迟时间，所述信号处理器总是在特定时间跨度期间组合来自在所述第一输入连接处接收的所述信号的差信号， 所述信号在所述第二输入连接处被接收，滞后于所述信号延迟时间，所述信号处理器确定在所述特定时间跨度期间在所述第一输入连接处接收到的所述信号的频谱组成以及所述各个差分信号，所述信号处理器确定听觉 阈值，并将所确定的听力阈值与相应的差分信号进行比较。