dcase_util.features.MfccDeltaExtractor
- class dcase_util.features.MfccDeltaExtractor(fs=44100, win_length_samples=None, hop_length_samples=None, win_length_seconds=0.04, hop_length_seconds=0.02, spectrogram_type='magnitude', n_fft=2048, window_type='hamming_asymmetric', n_mels=40, fmin=0, fmax=None, normalize_mel_bands=False, htk=False, n_mfcc=20, omit_zeroth=False, width=9, **kwargs)[source]
Feature extractor class to extract MFCC delta features
Constructor
- Parameters
- fsint
Sampling rate of the incoming signal. Default value 44100
- win_length_samplesint
Window length in samples. Default value None
- hop_length_samplesint
Hop length in samples. Default value None
- win_length_secondsfloat
Window length in seconds. Default value 0.04
- hop_length_secondsfloat
Hop length in seconds. Default value 0.02
- spectrogram_typestr
Spectrogram type, magnitude or power spectrogram. Default value ‘magnitude’
- n_fftint
Length of the FFT window. Default value 2048
- window_typestr
Window function type. Default value ‘hamming_asymmetric’
- n_melsint
Number of mel bands to generate. Default value 40
- fminint
Lowest frequency in mel bands (in Hz). Default value 0
- fmaxint
Highest frequency in mel bands (in Hz), if None, fmax = fs/2.0. Default value None
- normalize_mel_bandsbool
Normalize mel band to have peak at 1.0. Default value False
- htkbool
Use HTK formula for mel band creation instead of Slaney. Default value False
- n_mfccint
Number of MFCC coefficients. Default value 20
- omit_zerothbool
Omit 0th coefficient. Default value False
- widthint
Width of the delta window. Default value 9
- __init__(fs=44100, win_length_samples=None, hop_length_samples=None, win_length_seconds=0.04, hop_length_seconds=0.02, spectrogram_type='magnitude', n_fft=2048, window_type='hamming_asymmetric', n_mels=40, fmin=0, fmax=None, normalize_mel_bands=False, htk=False, n_mfcc=20, omit_zeroth=False, width=9, **kwargs)[source]
Constructor
- Parameters
- fsint
Sampling rate of the incoming signal. Default value 44100
- win_length_samplesint
Window length in samples. Default value None
- hop_length_samplesint
Hop length in samples. Default value None
- win_length_secondsfloat
Window length in seconds. Default value 0.04
- hop_length_secondsfloat
Hop length in seconds. Default value 0.02
- spectrogram_typestr
Spectrogram type, magnitude or power spectrogram. Default value ‘magnitude’
- n_fftint
Length of the FFT window. Default value 2048
- window_typestr
Window function type. Default value ‘hamming_asymmetric’
- n_melsint
Number of mel bands to generate. Default value 40
- fminint
Lowest frequency in mel bands (in Hz). Default value 0
- fmaxint
Highest frequency in mel bands (in Hz), if None, fmax = fs/2.0. Default value None
- normalize_mel_bandsbool
Normalize mel band to have peak at 1.0. Default value False
- htkbool
Use HTK formula for mel band creation instead of Slaney. Default value False
- n_mfccint
Number of MFCC coefficients. Default value 20
- omit_zerothbool
Omit 0th coefficient. Default value False
- widthint
Width of the delta window. Default value 9
Methods
__init__([fs, win_length_samples, ...])Constructor
extract(y)Extract features for the audio signal.
get_spectrogram(y[, n_fft, ...])Spectrogram
get_window_function(n[, window_type])Window function
log([level])Log container content
show([mode, indent, visualize])Print container content
to_html([indent])Get container information in a HTML formatted string
to_string([ui, indent])Get container information in a string
Attributes
descriptionExtractor description
labelExtractor label
loggerLogger instance