spandsp 0.0.6
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The coefficient set for a bi-quad that makes a signalling flat filter. Some signalling tone schemes require such a filter, and some don't. It is termed a flat filter, to distinguish it from the sharp filter, but obviously it is not actually flat. It is a broad band weighting filter. More...
#include <sig_tone.h>
Public Attributes | |
float | a [3] |
Flat mode bandpass bi-quad parameters. | |
float | b [3] |
Flat mode bandpass bi-quad parameters. | |
The coefficient set for a bi-quad that makes a signalling flat filter. Some signalling tone schemes require such a filter, and some don't. It is termed a flat filter, to distinguish it from the sharp filter, but obviously it is not actually flat. It is a broad band weighting filter.