Myoelastic features extractor

Typedefs
typedef struct SDTMyoelastic	SDTMyoelastic
	Opaque data structure for a myoelastic feature extractor object.
typedef struct SDTMyoelastic	SDTMyoelastic
	Opaque data structure for a myoelastic feature extractor object.

Functions
SDTMyoelastic *	SDTMyoelastic_new (int size)
	Instantiates a myoelastic feature extractor. More...
void	SDTMyoelastic_free (SDTMyoelastic *x)
	Destroys a myoelastic feature extractor. More...
void	SDTMyoelastic_setDcFrequency (SDTMyoelastic *x, double f)
	Sets the DC offset cutoff. More...
void	SDTMyoelastic_setLowFrequency (SDTMyoelastic *x, double f)
	Sets the low frequency cutoff. More...
void	SDTMyoelastic_setHighFrequency (SDTMyoelastic *x, double f)
	Sets the high frequency cutoff. More...
void	SDTMyoelastic_setThreshold (SDTMyoelastic *x, double f)
	Sets the amplitude threshold of the input gate. Myoelastic activity is not computed for signals whose amplitude is below this thresold. More...
int	SDTMyoelastic_dsp (SDTMyoelastic *x, double *outs, double in)
	Signal processing routine. Call this function at sample rate to perform signal analysis. More...

Detailed Description

Extracts amount and frequency of slow amplitude variations in the signal. Specifically designed for the detection of myoelastic activity in vocal input.

Function Documentation

int SDTMyoelastic_dsp	(	SDTMyoelastic *	x,
		double *	outs,
		double	in
	)

Signal processing routine. Call this function at sample rate to perform signal analysis.

Parameters

[in]	x	Pointer to the instance
[out]	outs	Pointer to an array of four doubles containing the algorithm output (slow myoelastic amount and frequency, fast myoelastic amount and frequency)
[in]	in	Input sample

Returns

1 if output available, 0 otherwise

void SDTMyoelastic_free

(

SDTMyoelastic *

x

)

Destroys a myoelastic feature extractor.

Parameters

[in]

x

Pointer to the instance to destroy

SDTMyoelastic * SDTMyoelastic_new

(

int

size

)

Instantiates a myoelastic feature extractor.

Returns

Pointer to the new instance

void SDTMyoelastic_setDcFrequency	(	SDTMyoelastic *	x,
		double	f
	)

Sets the DC offset cutoff.

Parameters

[in]	x	Pointer to the instance
[in]	f	DC offset cutoff, in Hz

void SDTMyoelastic_setHighFrequency	(	SDTMyoelastic *	x,
		double	f
	)

Sets the high frequency cutoff.

Parameters

[in]	x	Pointer to the instance
[in]	f	High frequency cutoff, in Hz

void SDTMyoelastic_setLowFrequency	(	SDTMyoelastic *	x,
		double	f
	)

Sets the low frequency cutoff.

Parameters

[in]	x	Pointer to the instance
[in]	f	Low frequency cutoff, in Hz

void SDTMyoelastic_setThreshold	(	SDTMyoelastic *	x,
		double	f
	)

Sets the amplitude threshold of the input gate. Myoelastic activity is not computed for signals whose amplitude is below this thresold.

Parameters

[in]	x	Pointer to the instance
[in]	f	Amplitude threshold