13 Jun
2005
13 Jun
'05
7:47 a.m.
Alfons Adriaensen wrote:
What do you mean by 'signal to noise ratio' of
a resample algo ?
I see no reason why it should produce noise, so it's probably not
what the words suggest.
All sample rate conversion algorithms produce unwanted artifacts.
These artifacts are usually highly correlated with the input signal,
but sometimes do in fact sound like noise.
I gave a handwavey guide to measuring the SNR of a converter in
these slides presented at the Audio Miniconf associated with
LCA 2005. The slides are here:
http://www.mega-nerd.com/tmp/secret_rabbit_code.pdf
The measuring os SNR is on pages 16-19 inclusive.
Erik
--
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Erik de Castro Lopo nospam(a)mega-nerd.com (Yes it's valid)
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"I consider C++ the most significant technical hazard to the survival
of your project and do so without apologies." -- Alistair Cockburn