What does MFCC stand for?
Mel-Frequency Cepstral Coefficients
MFCC is a feature extraction technique used in audio processing.
What does PLP-CC stand for?
Perceptual Linear Prediction Cepstral Coefficients
PLP-CC is another feature extraction technique used in audio processing.
What are the two main types of features that can extend the feature set?
- Amplitude features
- Dynamic features
Dynamic features include deltas and accelerations.
What is an amplitude feature mentioned in the text?
Log energy
Log energy is a way to encode the signal level.
What is the frequency analysis method used in MFCC?
STFT & triangular mel critical-band filters
STFT stands for Short-Time Fourier Transform.
What is the frequency analysis method used in PLP-CC?
STFT & equal-loudness filters
Equal-loudness filters apply a 6 dB/octave weighting.
What type of smoothing is used in MFCC?
Cepstral smoothing
This technique helps in reducing noise in the feature extraction process.
What type of smoothing is used in PLP-CC?
LPC smoothing
LPC stands for Linear Predictive Coding.
What is the frequency weighting method used in MFCC?
Logarithmic
Logarithmic weighting helps in emphasizing perceptually important frequencies.
What is the frequency weighting method used in PLP-CC?
Cube-root
Cube-root weighting is used to model human auditory perception.
