OnePole Class Reference
[Processing]
Simple one-pole digital filter.
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#include <OnePole.h>
Inherits Marsyas::MarSystem.
Private Attributes | |
| mrs_real | alpha_ |
| Cache for the alpha value. | |
| mrs_real | gain_ |
| Cache for the gain value. | |
| realvec | previousOutputSamples_ |
| Internal memory for the last samples of the previous observed slice. | |
Detailed Description
Simple one-pole digital filter.OnePole implements the digital filter described by equation
![\[ y(t) = (1 - \alpha) x(t) + \alpha y(t - 1) \]](form_8.png)
This filter has one pole at 
. If 
, the filter has a low-pass characteristic, the closer to 1 the smaller the pass band. If 
, it has a high-pass characteristic, the closer to -1, the smaller the pass band.
Note that the coefficient of 
is set to 
to have unity gain for the DC component (both in the low pass and high pass case) as a sort of normalization.
Controls:
- mrs_real/alpha [w]: the
parameter in the filter equation.
- See also:
- Filter
Definition at line 50 of file OnePole.h.
The documentation for this class was generated from the following files:
- /home/marsyas/marsyas/src/marsyas/OnePole.h
- /home/marsyas/marsyas/src/marsyas/OnePole.cpp
