绘制MFCC功率谱图Python

Question

谁能帮助我将mfcc功能绘制为功率谱图！ 我只能绘制在时域中未表示的mfcc系数。 我想在时域中绘制mfcc功能。 我还尝试应用DCT将其转换为时域！

from python_speech_features import mfcc
#from python_speech_features import logfbank `enter code here`
import scipy.io.wavfile as wav
import pandas as pd
import matplotlib.pyplot as plt
from python_speech_features import logfbank
import scipy.fftpack

(rate,sig) = wav.read("Voice0003.wav")
mfcc_feat = mfcc(sig,rate)


(rate2,sig2) = wav.read("Voice0004.wav")
mfcc_feat2 = mfcc(sig2,rate2)
yf = scipy.fftpack.fft(sig,rate)
#fbank_feat = logfbank(yf)
#dct=scipy.fftpack.dct(fbank_feat      tried converting into Time Domain            didnt help


print(len(mfcc_feat))
print(len(mfcc_feat2))

pd.DataFrame(mfcc_feat2).T.plot()
plt.show()
pd.DataFrame(mfcc_feat).T.plot()
plt.show()

Answer 1

Pxx，freqs，bins，im = plt.specgram（信号，NFFT = NFFT，Fs = 2，noverlap = 100，cmap = None）＃信号是.wav文件的一维数组