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。