krotos::FrequencyDomainAnalysisFramework Class Reference

#include <FrequencyDomainAnalysisFramework.h>

Public Member Functions
	FrequencyDomainAnalysisFramework (int analysisFrameSize, int sampleRate)
void	setSamplingFrequency (int fs)
void	setNumberOfMelFrequencyCoefficients (int numCoeffs)
void	setNumberOfMelFrequencyCepstralCoefficients (int numCoeffs)
void	setFrequencyVector (const std::vector< float > &freqVector)
int	getSamplingFrequency ()
int	getNumberOfMelFrequencyCepstralCoefficients ()
void	setSpectralFrame (std::vector< float > spectralFrame)
float	getFreqOfLoudestPartial ()
std::vector< float >	getMelSpectrum ()
std::vector< float >	getMFCC ()
float	getSpectralCentroid ()
float	getSpectralFlatness ()
float	getSpectralRolloff ()
float	getSpectralSpread ()
float	getSpectralSlope ()
float	getSpectralFlux ()
float	getSpectralKurtosis ()
float	getFrameEnergy ()
float	getHighFreqencyContentOnsetDectionFunction ()
float	getComplexSpectralDifference ()

Private Member Functions
void	initialiseSpectralAnalysisAlgorithms ()
float	calculateSpectralMoment (int n)

Private Attributes
int	m_samplingFrequency {-1}
std::vector< float >	m_spectralFrame
int	m_spectralFrameSize {-1}
std::vector< float >	m_freqVector
std::vector< float >	m_prevMagSpecSpectralFlux
std::vector< float >	m_prevMagSpecCSD
std::vector< float >	m_prevPhase1CSD
std::vector< float >	m_prevPhase2CSD
MelFrequencySpectrum	m_melFrequencySpectrum
DiscreteCosineTransform	m_dct
int	m_numMelCoefficients
int	m_numMelCepstralCoefficients
std::vector< float >	m_windowing

Constructor & Destructor Documentation

FrequencyDomainAnalysisFramework()

krotos::FrequencyDomainAnalysisFramework::FrequencyDomainAnalysisFramework	(	int	analysisFrameSize,
		int	sampleRate )

Constructor. Initialises the audio analysis framework

Parameters

inputFrameIncrement	the distance moved between analysed frames
analysisBufferSize	the audio analysis buffer size
fs	the sampling frequency

Copyright Krotos LTD 2015

All rights reserved.

Member Function Documentation

calculateSpectralMoment()

float krotos::FrequencyDomainAnalysisFramework::calculateSpectralMoment ( int n )

private

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ NEED COMPLEX FFT HERE ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

getComplexSpectralDifference()

float krotos::FrequencyDomainAnalysisFramework::getComplexSpectralDifference

(

)

@Returns the complex spectral difference onset detection function

getFrameEnergy()

float krotos::FrequencyDomainAnalysisFramework::getFrameEnergy

(

)

@Returns the frame energy of the frame

getFreqOfLoudestPartial()

float krotos::FrequencyDomainAnalysisFramework::getFreqOfLoudestPartial

(

)

@Returns the frequency in Hz of the largest magnitude FFT bin

getHighFreqencyContentOnsetDectionFunction()

float krotos::FrequencyDomainAnalysisFramework::getHighFreqencyContentOnsetDectionFunction

(

)

@Returns the high frequency content onset detection function

getMelSpectrum()

std::vector< float > krotos::FrequencyDomainAnalysisFramework::getMelSpectrum

(

)

@Returns the mel spectrum as a vector

getMFCC()

std::vector< float > krotos::FrequencyDomainAnalysisFramework::getMFCC

(

)

@Returns the mel-frequency cepstral coefficients as a vector

getNumberOfMelFrequencyCepstralCoefficients()

int krotos::FrequencyDomainAnalysisFramework::getNumberOfMelFrequencyCepstralCoefficients

(

)

Sets the number of Mel-frequency Cepstral Coefficients to be calculated

getSamplingFrequency()

int krotos::FrequencyDomainAnalysisFramework::getSamplingFrequency

(

)

@Returns the sampling frequency

getSpectralCentroid()

float krotos::FrequencyDomainAnalysisFramework::getSpectralCentroid

(

)

@Returns the spectral centroid

getSpectralFlatness()

float krotos::FrequencyDomainAnalysisFramework::getSpectralFlatness

(

)

@Returns the spectral flatness

getSpectralFlux()

float krotos::FrequencyDomainAnalysisFramework::getSpectralFlux

(

)

@Returns the spectral flux of the signal

getSpectralKurtosis()

float krotos::FrequencyDomainAnalysisFramework::getSpectralKurtosis

(

)

@Returns the spectral kurtosis of the signal

getSpectralRolloff()

float krotos::FrequencyDomainAnalysisFramework::getSpectralRolloff

(

)

@Returns the spectral rolloff

getSpectralSlope()

float krotos::FrequencyDomainAnalysisFramework::getSpectralSlope

(

)

@Returns the spectral slope

getSpectralSpread()

float krotos::FrequencyDomainAnalysisFramework::getSpectralSpread

(

)

@Returns the spectral spread

initialiseSpectralAnalysisAlgorithms()

void krotos::FrequencyDomainAnalysisFramework::initialiseSpectralAnalysisAlgorithms ( )

private

Sets spectral frame and the spectral frame Size

setFrequencyVector()

void krotos::FrequencyDomainAnalysisFramework::setFrequencyVector

(

const std::vector< float > &

freqVector

)

Sets the frequencyVector to calculate spectral features on.

setNumberOfMelFrequencyCepstralCoefficients()

void krotos::FrequencyDomainAnalysisFramework::setNumberOfMelFrequencyCepstralCoefficients

(

int

numCoeffs

)

Sets the number of Mel-frequency Cepstral Coefficients to be calculated

setNumberOfMelFrequencyCoefficients()

void krotos::FrequencyDomainAnalysisFramework::setNumberOfMelFrequencyCoefficients

(

int

numCoeffs

)

Sets the number of Mel-frequency Coefficients to be used for the Mel-frequency Spectrum

setSamplingFrequency()

void krotos::FrequencyDomainAnalysisFramework::setSamplingFrequency

(

int

fs

)

Sets the sampling frequency to be used for audio analysis

Parameters

fs	the sampling frequency to be used

setSpectralFrame()

void krotos::FrequencyDomainAnalysisFramework::setSpectralFrame

(

std::vector< float >

spectralFrame

)

Receives a spectral frame to perform some analysis calculations and analysis features upon.

Member Data Documentation

m_dct

DiscreteCosineTransform krotos::FrequencyDomainAnalysisFramework::m_dct

private

m_freqVector

std::vector<float> krotos::FrequencyDomainAnalysisFramework::m_freqVector

private

m_melFrequencySpectrum

MelFrequencySpectrum krotos::FrequencyDomainAnalysisFramework::m_melFrequencySpectrum

private

m_numMelCepstralCoefficients

int krotos::FrequencyDomainAnalysisFramework::m_numMelCepstralCoefficients

private

m_numMelCoefficients

int krotos::FrequencyDomainAnalysisFramework::m_numMelCoefficients

private

m_prevMagSpecCSD

std::vector<float> krotos::FrequencyDomainAnalysisFramework::m_prevMagSpecCSD

private

m_prevMagSpecSpectralFlux

std::vector<float> krotos::FrequencyDomainAnalysisFramework::m_prevMagSpecSpectralFlux

private

m_prevPhase1CSD

std::vector<float> krotos::FrequencyDomainAnalysisFramework::m_prevPhase1CSD

private

m_prevPhase2CSD

std::vector<float> krotos::FrequencyDomainAnalysisFramework::m_prevPhase2CSD

private

m_samplingFrequency

int krotos::FrequencyDomainAnalysisFramework::m_samplingFrequency {-1}

private

m_spectralFrame

std::vector<float> krotos::FrequencyDomainAnalysisFramework::m_spectralFrame

private

m_spectralFrameSize

int krotos::FrequencyDomainAnalysisFramework::m_spectralFrameSize {-1}

private

m_windowing

std::vector<float> krotos::FrequencyDomainAnalysisFramework::m_windowing

private

---

The documentation for this class was generated from the following files:

• krotos_dsp/utilities/analysis_modules/frequency_domain_analysis/FrequencyDomainAnalysisFramework.h
• krotos_dsp/utilities/analysis_modules/frequency_domain_analysis/FrequencyDomainAnalysisFramework.cpp