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我正在寻找 matlab 中音频文件的简单离散小波变换源代码。谁能告诉我在哪里可以找到它?
离散小波变换可以应用于任何信号,因此您可以使用图像处理工具箱中wavedec的dwt函数:
wavedec
dwt
wname = 'haar' [y Fs] = wavread('filename.wav'); [C L] = wavedec(y, 1, wname); wavplay(C(1:L(1)),Fs/2)
您将听到经过低通滤波和下采样的音频样本