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Topic: Faster Filter, Analog or Digital (Read 2371 times) previous topic - next topic

pjrc

Overflow is only one of the issues.  On a technical level, yes of course you're correct to say "just have to scale your fixed point numbers appropriately".  But implying this is easy, or that overflow is the main problem, really underestimates how difficult this is to really do in practice.

MarkT

On a practical note the Python library scipy.signal has a good set of filter functions and its
fairly easy to take a filter design, truncate the coefficients to N-bit precision and look at how
much the response changes.
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