iir

This function implements a Infinite Impulse Filter. More...

Functions
AFAPI array	iir (const array &b, const array &a, const array &x)
	C++ Interface for infinite impulse response filter. More...
AFAPI af_err	af_iir (af_array *y, const af_array b, const af_array a, const af_array x)
	C Interface for infinite impulse response filter. More...

Detailed Description

This function implements a Infinite Impulse Filter.

Iinite impulse filters take an input x and a feedforward array b, feedback array a to generate an output y such that:

   \f$\sum_{j = 0}^Q a_j . y[n] = \sum_{i = 0}^P b_i . x[n]\f$

Function Documentation

af_iir()

AFAPI af_err af_iir	(	af_array *	y,
		const af_array	b,
		const af_array	a,
		const af_array	x
	)

C Interface for infinite impulse response filter.

Parameters

[out]	y	is the output signal from the filter
[in]	b	is the array containing the feedforward coefficients
[in]	a	is the array containing the feedback coefficients
[in]	x	is the input signal to the filter

Note

The feedforward coefficients are currently limited to a length of 512

iir()

AFAPI array iir	(	const array &	b,
		const array &	a,
		const array &	x
	)

C++ Interface for infinite impulse response filter.

Parameters

[in]	b	is the array containing the feedforward coefficients
[in]	a	is the array containing the feedback coefficients
[in]	x	is the input signal to the filter

Returns

the output signal from the filter

Note

The feedforward coefficients are currently limited to a length of 512