Ci_simulation_cis_cfg Class Reference

Runtime configuration class for generating an electrodogram from an audio signal, using a stimulation strategy similar to a typical CIS (continuous interleaved sampling) coding strategy with 12 channels. More...

Public Member Functions
	Ci_simulation_cis_cfg (std::vector< mha_real_t > weights, mha_real_t compression_coefficient, mha_real_t base_level, mha_real_t saturation_level, std::vector< mha_real_t > threshold_level, std::vector< mha_real_t > maximum_comfortable_level, std::vector< int > disabled_electrodes, unsigned int stimulation_order, std::default_random_engine random_number_generator, Ci_simulation_cis *Ci_simulation_cis)
	Constructor of the runtime configuration class. More...
	~Ci_simulation_cis_cfg ()
	Destructor of the runtime configuration class. More...
mha_wave_t *	process (mha_wave_t *signal, Ci_simulation_cis *Ci_simulation_cis, MHA_AC::waveform_t *electrodogram_ac)
	Process function of the runtime configuration class (main signal processing function). More...

Private Attributes
std::vector< mha_real_t >	weights_cfg
	Vector containing the weights for the analysis filterbank bands. More...
mha_real_t	compression_coefficient_cfg
	Compression coefficient of the loudness growth function. More...
mha_real_t	base_level_cfg
	Base level of the input (acoustic) dynamic range. More...
mha_real_t	saturation_level_cfg
	Saturation level of the input (acoustic) dynamic range. More...
std::vector< mha_real_t >	threshold_level_cfg
	Vector containing the threshold level of the output (electric) dynamic range for each electrode. More...
std::vector< mha_real_t >	maximum_comfortable_level_cfg
	Vector containing the maximum comfortable level of the output (electric) dynamicrange for each electrode. More...
std::vector< int >	disabled_electrodes_cfg
	Vector containing the indices of any disabled electrodes. More...
unsigned int	stimulation_order_cfg
	Electrode stimulation order. More...
std::default_random_engine	random_number_generator_cfg
	Random number generator for randomization of stimulation order. More...
MHASignal::waveform_t *	signal_out
	Pointer to the current output signal fragment. More...

Detailed Description

Runtime configuration class for generating an electrodogram from an audio signal, using a stimulation strategy similar to a typical CIS (continuous interleaved sampling) coding strategy with 12 channels.

Constructor & Destructor Documentation

Ci_simulation_cis_cfg()

Ci_simulation_cis_cfg::Ci_simulation_cis_cfg	(	std::vector< mha_real_t >	weights,
		mha_real_t	compression_coefficient,
		mha_real_t	base_level,
		mha_real_t	saturation_level,
		std::vector< mha_real_t >	threshold_level,
		std::vector< mha_real_t >	maximum_comfortable_level,
		std::vector< int >	disabled_electrodes,
		unsigned int	stimulation_order,
		std::default_random_engine	random_number_generator,
		Ci_simulation_cis *	Ci_simulation_cis
	)

Constructor of the runtime configuration class.

Parameters

weights	Vector containing the weights for the analysis filterbank bands
compression_coefficient	Compression coefficient of the loudness growth function
base_level	Base level of the input (acoustic) dynamic range / Pa
saturation_level	Saturation level of the input (acoustic) dynamic range / Pa
threshold_level	Vector containing the threshold level of the output (electric) dynamic range for each electrode / cu
maximum_comfortable_level	Vector containing the maximum comfortable level of the output (electric) dynamicrange for each electrode / cu
disabled_electrodes	Vector containing the indices of any disabled electrodes
stimulation_order	Electrode stimulation order
random_number_generator	Random number generator for randomization of stimulation order
Ci_simulation_cis	Pointer to the current instance of the plugin interface class

~Ci_simulation_cis_cfg()

Ci_simulation_cis_cfg::~Ci_simulation_cis_cfg

(

)

Destructor of the runtime configuration class.

Member Function Documentation

process()

mha_wave_t * Ci_simulation_cis_cfg::process	(	mha_wave_t *	signal,
		Ci_simulation_cis *	Ci_simulation_cis,
		MHA_AC::waveform_t *	electrodogram_ac
	)

Process function of the runtime configuration class (main signal processing function).

It takes an input signal fragment as well as the real and imaginary outputs of a gammatone filterbank with m bands as a parameter, resulting in a total of 1 + m * 2 input signal channels. It returns the input signal fragment unchanged; the purpose of the function is to compute the AC variable electrodogram_ac from the gammatone filterbank output for further processing in the plugin chain

Parameters

signal	Pointer to the current input signal fragment + gammatone filterbank output
Ci_simulation_cis	Pointer to the current instance of the plugin interface class
electrodogram_ac	AC variable containing a pointer to the electrodogram

Returns

Pointer to the (unchanged) output signal fragment

Member Data Documentation

weights_cfg

std::vector<mha_real_t> Ci_simulation_cis_cfg::weights_cfg

private

Vector containing the weights for the analysis filterbank bands.

compression_coefficient_cfg

mha_real_t Ci_simulation_cis_cfg::compression_coefficient_cfg

private

Compression coefficient of the loudness growth function.

base_level_cfg

mha_real_t Ci_simulation_cis_cfg::base_level_cfg

private

Base level of the input (acoustic) dynamic range.

saturation_level_cfg

mha_real_t Ci_simulation_cis_cfg::saturation_level_cfg

private

Saturation level of the input (acoustic) dynamic range.

threshold_level_cfg

std::vector<mha_real_t> Ci_simulation_cis_cfg::threshold_level_cfg

private

Vector containing the threshold level of the output (electric) dynamic range for each electrode.

maximum_comfortable_level_cfg

std::vector<mha_real_t> Ci_simulation_cis_cfg::maximum_comfortable_level_cfg

private

Vector containing the maximum comfortable level of the output (electric) dynamicrange for each electrode.

disabled_electrodes_cfg

std::vector<int> Ci_simulation_cis_cfg::disabled_electrodes_cfg

private

Vector containing the indices of any disabled electrodes.

stimulation_order_cfg

unsigned int Ci_simulation_cis_cfg::stimulation_order_cfg

private

Electrode stimulation order.

random_number_generator_cfg

std::default_random_engine Ci_simulation_cis_cfg::random_number_generator_cfg

private

Random number generator for randomization of stimulation order.

signal_out

MHASignal::waveform_t* Ci_simulation_cis_cfg::signal_out

private

Pointer to the current output signal fragment.

---

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

• ci_simulation_cis.hh
• ci_simulation_cis.cpp