dcase_util.processors.MelExtractorProcessor

class dcase_util.processors.MelExtractorProcessor(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, logarithmic=True, **kwargs)

Constructor

Parameters

fsint

Sampling rate of the incoming signal.

win_length_samplesint

Window length in samples.

hop_length_samplesint

Hop length in samples.

win_length_secondsfloat

Window length in seconds.

hop_length_secondsfloat

Hop length in seconds.

spectrogram_typestr

Spectrogram type, magnitude or power spectrogram.

n_fftint

Length of the FFT window.

window_typestr

Window function type.

n_melsint

Number of mel bands to generate

fminint

Lowest frequency in mel bands (in Hz)

fmaxint

Highest frequency in mel bands (in Hz), if None, fmax = fs/2.0

normalize_mel_bandsbool

Normalize mel band to have peak at 1.0

htkbool

Use HTK formula for mel band creation instead of Slaney

logarithmicbool

Switch for log mel-band energies

__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, logarithmic=True, **kwargs)

Constructor

Parameters

fsint

Sampling rate of the incoming signal.

win_length_samplesint

Window length in samples.

hop_length_samplesint

Hop length in samples.

win_length_secondsfloat

Window length in seconds.

hop_length_secondsfloat

Hop length in seconds.

spectrogram_typestr

Spectrogram type, magnitude or power spectrogram.

n_fftint

Length of the FFT window.

window_typestr

Window function type.

n_melsint

Number of mel bands to generate

fminint

Lowest frequency in mel bands (in Hz)

fmaxint

Highest frequency in mel bands (in Hz), if None, fmax = fs/2.0

normalize_mel_bandsbool

Normalize mel band to have peak at 1.0

htkbool

Use HTK formula for mel band creation instead of Slaney

logarithmicbool

Switch for log mel-band energies

Methods

__init__([fs, win_length_samples, ...])	Constructor
delimiter([exclude_delimiters])	Use csv.sniffer to guess delimiter for CSV file
detect_file_format([filename])	Detect file format from extension
empty()	Check if file is empty
exists()	Checks that file exists
extract(y)	Extract features for the audio signal.
get_file_information()	Get file information, filename
get_processing_chain_item()	Get processing chain item with current Processor data.
get_spectrogram(y[, n_fft, ...])	Spectrogram
get_window_function(n[, window_type])	Window function
is_package([filename])	Determine if the file is compressed package.
load([filename])	Load file
log([level])	Log container content
process([data, store_processing_chain])	Extract features
save([filename])	Save file
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
validate_format()	Validate file format

Attributes

bytes	File size in bytes
description	Extractor description
input_type	Input data type
label	Extractor label
logger	Logger instance
md5	Checksum for file.
output_type	Output data type
valid_formats	Valid file formats