Voice recognition vs speech recognition MFCC

1. What is the difference between voice and speech recognition?
2. What is MFCC in speech recognition?
3. Is mel spectrogram same as MFCC?

What is the difference between voice and speech recognition?

Essentially, voice recognition is recognising the voice of the speaker whilst speech recognition is recognising the words said. This is important as they both fulfil different roles in technology.

What is MFCC in speech recognition?

Mel-Frequency Cepstrum Coefficients (MFCC)

In the source-filter model of speech, MFCC are understood to represent the filter (vocal tract). The frequency response of the vocal tract is relatively smooth, whereas the source of voiced speech can be modeled as an impulse train.

Is mel spectrogram same as MFCC?

Mel-Spectrogram is computed by applying a Fourier transform to analyze the frequency content of a signal and to convert it to the mel-scale, while MFCCs are calculated with a discrete cosine transform (DCT) into a melfrequency spectrogram.