[SciPy-User] Single or double precision?
Mon Oct 29 08:18:11 CDT 2012
Sorry this might be a bit off-topic. But I'll ask on this list anyway:
Given that a signal is sampled at 16 bits resolution (at an ADC), will
it always be sufficient to store a filtered version at single precision?
I.e. a float32 has a 23 bit mantissa, so the truncation error should be
tiny compared to the digitization error from the 16 bits ADC. Or am I
thinking wrongly about this? Usually I don't care and just use double
precision everywhere. But I will save gigabytes of store space by using
single precision here.
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