Matlab中MFCC系数的一阶导数

Question

I have extracted mel frequency cepstral coefficient (MFCC) features (in Matlab) for some speech classification. I'm currently thinking of adding the first and second derivatives of MFCC coefficient features. How can we get first and second derivatives from the MFCC?

Thanks in Advance

Answer 1

You can use the mfcc method like this:

[coeffs,delta,deltaDelta] = mfcc(audioIn,fs);

Where coeffs is a vector containing the main features obtained using mfcc function, delta is a vector with the first derivatives, deltaDelta is also a vector with the second derivatives, audioIn is the audio you want to extract features, and fs is the sampling frequency.

You can find the documentation here:

https://www.mathworks.com/help/audio/ref/mfcc.html