libTLK
1.3.1
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Feature extractor. More...
Data Fields | |
tLTypeFeatures | ftype |
Type of the features. | |
int | outfreq |
Output frequency. | |
double | wduration |
Duration for each extraction window in seconds. | |
int | numchans |
Number of channels used for the Mel filter bank. | |
int | lofreq |
Low frequency cut-off for filterbank analysis. | |
int | hifreq |
High frequency cut-off for filterbank analysis. | |
int | numceps |
Number of cepstral features (only for MFCC). | |
tLBool | zeromean |
Removes the DC mean from the source. | |
double | preemcoef |
Coefficient used to pre-emphasize the signal ([0,1[). | |
tLBool | usehamming |
Apply Hamming windowing. | |
tLBool | usepower |
Uses the power in filterbank analysis. | |
int | ceplifter |
Value used to lifter the cepstra. | |
tLBool | energy |
Calculates the energy and normalizes it. | |
int | deltawindow |
Width of the window used to calculate delta coefficients. | |
tLBool | cep0 |
Add Cepstral 0. | |
tLBool | meannorm |
Normalize the vectors substracting the mean. | |
int | accwindow |
Width of the window used to calculate acceleration coefficients. |
Feature extractor.
This structure is used for feature extraction. Public fields could be modified at any time.
Width of the window used to calculate acceleration coefficients.
A 0 value disables the calculation of acceleration coeeficients. Default value 2.
Add Cepstral 0.
Default value TRUE.
Value used to lifter the cepstra.
Default 22.
Width of the window used to calculate delta coefficients.
A 0 value disables the calculation of delta coefficients. Default value 2.
Calculates the energy and normalizes it.
Default TRUE.
tLTypeFeatures tLFeatureExtractor::ftype |
Type of the features.
Default TL_MFCC.
High frequency cut-off for filterbank analysis.
Default INT_MAX.
Low frequency cut-off for filterbank analysis.
Default 0.
Normalize the vectors substracting the mean.
Default value TRUE.
Number of cepstral features (only for MFCC).
Default 12.
Number of channels used for the Mel filter bank.
Default 26.
Output frequency.
Default 100Hz.
Coefficient used to pre-emphasize the signal ([0,1[).
Default 0.97.
Apply Hamming windowing.
Default TRUE.
Uses the power in filterbank analysis.
Default TRUE.
Duration for each extraction window in seconds.
Default 0.025 (25ms).
Removes the DC mean from the source.
Default TRUE.