birdCLEF_spec.py 文件源码

def getMagSpec(sig, rate, winlen, winstep, NFFT):

    #get frames
    winfunc = lambda x:np.ones((x,))
    frames = psf.sigproc.framesig(sig, winlen*rate, winstep*rate, winfunc)        

    #Magnitude Spectrogram
    magspec = np.rot90(psf.sigproc.magspec(frames, NFFT))

    return magspec

#Split signal into five-second chunks with overlap of 4 and minimum length of 3 seconds
#Use these settings for other chunk lengths:
#winlen, winstep, seconds
#0.05, 0.0097, 5s
#0.05, 0.0195, 10s
#0.05, 0.0585, 30s