cypress::nef::DeltaSigma Class Reference

#include <delta_sigma.hpp>

Classes
class	DiscreteWindow
struct	ExponentialWindow
struct	GaussWindow

Static Public Member Functions
static std::vector< Real >	encode (const std::vector< Real > &values, const DiscreteWindow &window, Real t0, Real min_val=-1.0, Real max_val=1.0, Real min_spike_interval=DEFAULT_MIN_SPIKE_INTERVAL)
template<typename Fun >
static std::vector< Real >	encode (const Fun &f, const DiscreteWindow &window, Real t0, Real t1, Real min_val=-1.0, Real max_val=1.0, Real min_spike_interval=DEFAULT_MIN_SPIKE_INTERVAL)
static std::vector< Real >	decode (const std::vector< Real > &spikes, const DiscreteWindow &window, Real t0, Real t1, Real min_val=-1.0, Real max_val=1.0)

Static Public Attributes
static constexpr Real	DEFAULT_RESPONSE_TIME = 50e-3
static constexpr Real	DEFAULT_STEP = 1e-4
static constexpr Real	DEFAULT_EPS = 1e-6
static constexpr Real	DEFAULT_MIN_SPIKE_INTERVAL = 1e-3

Detailed Description

Structure providing static methods for encoding continuous-valued functions as a series of spikes and vice versa.

Member Function Documentation

static std::vector<Real> cypress::nef::DeltaSigma::decode ( const std::vector< Real > &  spikes, const DiscreteWindow &  window, Real  t0, Real  t1, Real  min_val = -1.0, Real  max_val = 1.0  )

static

Converts the given input spike train into a continuous-valued function by convoluting the spikes with the given window function. Note that the result sampling interval is equivalent to that specified in the window function.

Parameters

spikes	is an array containing the input spike times.
window	is the discretised window function that should be used.
t0	is the timestamp the first element in the result vector corresponds to.
t1	is the time the last timestamp in the result vector should correspond to.

static std::vector<Real> cypress::nef::DeltaSigma::encode ( const std::vector< Real > &  values, const DiscreteWindow &  window, Real  t0, Real  min_val = -1.0, Real  max_val = 1.0, Real  min_spike_interval = DEFAULT_MIN_SPIKE_INTERVAL  )

static

Encodes a time-series of continuous-valued list of values to a time-series of spikes, which can be decoded by convoluting the spike train with the given window function. Implemented as a delta-sigma encoder.

Parameters

values	is a list containing the function values. The sampling interval is taken from the given discretised window function.
t0	is the time offset that should be added to the resulting spikes.
window	is the discretised window function that should be used for encoding.
min_spike_interval	is the minimum delay between two spikes should be greater or equal to the window sampling interval.
min_val	is the minimum value occuring in the list of values.
max_val	is the maximum value occuring in the list of values.

template<typename Fun >

static std::vector<Real> cypress::nef::DeltaSigma::encode ( const Fun &  f, const DiscreteWindow &  window, Real  t0, Real  t1, Real  min_val = -1.0, Real  max_val = 1.0, Real  min_spike_interval = DEFAULT_MIN_SPIKE_INTERVAL  )

inlinestatic

Encodes a time-series of continuous-valued function as a time-series of spikes, which can be decoded by convoluting the spike train with the given window function. Implemented as a delta-sigma encoder.

Parameters

values	is a list containing the function values. The sampling interval is taken from the given discretised window function.
window	is the discretised window function that should be used for encoding.
min_spike_interval	is the minimum delay between two spikes should be greater or equal to the window sampling interval.
t0	is the time offset that should be added to the resulting spikes.
min_val	is the minimum value occuring in the list of values.
max_val	is the maximum value occuring in the list of values.

Member Data Documentation

constexpr Real cypress::nef::DeltaSigma::DEFAULT_EPS = 1e-6

static

constexpr Real cypress::nef::DeltaSigma::DEFAULT_MIN_SPIKE_INTERVAL = 1e-3

static

constexpr Real cypress::nef::DeltaSigma::DEFAULT_RESPONSE_TIME = 50e-3

static

constexpr Real cypress::nef::DeltaSigma::DEFAULT_STEP = 1e-4

static

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

• cypress/nef/delta_sigma.hpp