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8 通道双正交余弦调制滤波器组实现，滤波器的采样频率为 Fs:20000Hz 设计的低通原型的通带频率为625Hz 阻带衰减80db，滤波器的系数长度为512-8-channel biorthogonal cosine-modulated filter banks to achieve, filter sampling frequency Fs: 20000Hz designed a prototype low-pass frequency of 625Hz passband stopband attenuation of 80db, the length of filter coefficients for 512
