Howtosignalprocessing
What is hop length in MFCC?
mfcc has two arguments (which actually pass through to the underlying stft). win_length is the number of samples included in each time frame; it defaults to 2048, or ~93ms at 22 kHz SR. hop_length is the number of samples between successive windows; its default is 512, or the 23 ms you calculated.
What is the significance of MFCC?
MFCCs are commonly used as features in speech recognition systems, such as the systems which can automatically recognize numbers spoken into a telephone. MFCCs are also increasingly finding uses in music information retrieval applications such as genre classification, audio similarity measures, etc.
How many MFCC coefficients are there?
In practice, the first 8–13 MFCC coefficients are used to represent the shape of the spectrum. However, some applications require more higher-order coefficients to capture pitch and tone information.
