24 Oct
2007
24 Oct
'07
8:05 a.m.
On Tuesday 23 October 2007 00:05:13 James Cameron wrote:
A better way would be to use a highpass filter.
Use something like:
for (i=0; i<=NUM_SAMPLES; i++) {
hp_last = 0.9999f * hp_last + in[i] - hp_last_in;
hp_last_in = in[i];
out[i] = hp_last;
}
You could optimise that a bit.
Gordon
How would you filter out noise?
You can filter out DC offset by measuring the offset you have, and
subtracting this measurement from your samples.