On Tuesday 14 June 2005 11:29 am, Scott Dattalo scribbled:
> Neil,
>
> Here's a 2-sample hysteresis filter:
>
>    current_sample = filtered_data();
>
>    if ( (current_sample == last_sample) ||
>         (abs(current_sample - displayed_sample) > THRESHOLD))
>      displayed_sample = current_sample;
>
>    last_sample = current_sample;
>
> This cuts the flicker rate in half. To reduce it more, you can increase
> the number of required consecutive samples from 2 to N and save the last
> N-1 samples in an array.


That's pretty much what I'm doing now (except in assembly), except that it 
seems in this case, a change of <= THRESHOLD which never get updated on the 
display no matter how long that value holds.

Cheers,
-Neil.


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