aureservoir::IIRFilter< T > Class Template Reference

#include <filter.h>

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Detailed Description

template<typename T>
class aureservoir::IIRFilter< T >

General IIR Filter Implementation in Transposed Direct Form 2, which has good numeric stability properties.

See also:

http://ccrma.stanford.edu/~jos/filters/Transposed_Direct_Forms.html

The filter calculates the following difference equation (same usage as Matlab's filter object): a[0]*y[n] = b[0]*x[n] + b[1]*x[n-1] + ... + b[nb]*x[n-nb]

• a[1]*y[n-1] - ... - a[na]*y[n-na]

Public Member Functions
	IIRFilter ()
virtual	~IIRFilter ()
const IIRFilter &	operator= (const IIRFilter< T > &src)
class IIRFilter Implementation
void	setIIRCoeff (const typename DEMatrix< T >::Type &B, const typename DEMatrix< T >::Type &A) throw (AUExcept)
void	calc (typename DEVector< T >::Type &x)
Protected Attributes
DEMatrix< T >::Type	B_
DEMatrix< T >::Type	A_
DEMatrix< T >::Type	S_
DEVector< T >::Type	y_

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Constructor & Destructor Documentation

template<typename T>

aureservoir::IIRFilter< T >::IIRFilter

(

)

[inline]

Constructor.

template<typename T>

virtual aureservoir::IIRFilter< T >::~IIRFilter

(

)

[inline, virtual]

Destructor.

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Member Function Documentation

template<typename T>

const IIRFilter& aureservoir::IIRFilter< T >::operator=

(

const IIRFilter< T > &

src

)

[inline]

assignment operator

template<typename T>

void aureservoir::IIRFilter< T >::setIIRCoeff	(	const typename DEMatrix< T >::Type &	B,
		const typename DEMatrix< T >::Type &	A
	)			throw (AUExcept) [inline]

sets the filter coefficients

Parameters:

	B	matrix with numerator coefficient vectors (m x nb) m ... nr of parallel filters (neurons) nb ... nr of filter coefficients
	A	matrix with denominator coefficient vectors (m x na) m ... nr of parallel filters (neurons) na ... nr of filter coefficients

template<typename T>

void aureservoir::IIRFilter< T >::calc

(

typename DEVector< T >::Type &

x

)

[inline]

calculates one filter step on each element of x and writes the result back to x

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Field Documentation

template<typename T>

DEMatrix<T>::Type aureservoir::IIRFilter< T >::B_ [protected]

filter numerator coefficients

template<typename T>

DEMatrix<T>::Type aureservoir::IIRFilter< T >::A_ [protected]

filter denominator coefficients

template<typename T>

DEMatrix<T>::Type aureservoir::IIRFilter< T >::S_ [protected]

internal data for calculation

template<typename T>

DEVector<T>::Type aureservoir::IIRFilter< T >::y_ [protected]

temporal object to store output

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

• filter.h
• filter.hpp

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