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Learn or die.
License: Other
楼主:
首先感谢您的工作。
但是据我了解:
将语音由一维时间信号分解为二维时频信号通常有两种方式,即短时傅里
叶变换法和滤波器组法。由短时傅里叶变换得到的结果我们一般称之为语谱图
(Spectragram),根据短时窗长的不同,语谱图还可以细分为宽带语谱图(窗
较短)和窄带语谱图(窗较长)。关于滤波器组,目前最常用的就是通过模拟
人耳听觉机理而产生的Gammatone滤波器组,这种滤波器组的每个通道都包含
一个有特定中心频率和带宽的Gammatone滤波器。通过滤波器组滤波和加窗得
到的时频图我们一般称之为听觉谱图(Cochleagram)。
如果我说错了也请指正!谢谢
你好
Gammatone滤波器组:性质、实现和应用写的非常好
我想请教关于FIR的实现。
你写道:
g = @(t, f0, erb) t .^ 3 .* exp(- 2 * pi * 1.019 * erb * t) .* cos(2 * pi * f0 * t);
h = g((0:1 / fs:signal_length / fs)', central_freq, band_width);
y = filter(h, 1, x); % y = filter(B, A, x);
y = conv(h, x); % 相当于和输入信号卷积
我想请问这里central_freq,band_width,f0 如何确定
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