noise_reduction.py 文件源码

def noise_reduction(signal,params,winsize,window,ss,ntime):
    out=sp.zeros(len(signal),sp.float32)
    n_pow = compute_avgpowerspectrum(signal[0:winsize*int(params[2] /float(winsize)/(1000.0/ntime))],winsize,window)#maybe 300ms
    nf = len(signal)/(winsize/2) - 1
    for no in xrange(nf):
        s = get_frame(signal, winsize, no)
        add_signal(out, ss.compute_by_noise_pow(s,n_pow), winsize, no)
    return out