[Speex-dev] Range of Speex input samples

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Thu Feb 1 13:52:52 PST 2007

I think it should be fine. Just test and see if you're not sure.


Daniel Schmidt a écrit :
> Hello Jean-Marc.
> A few weeks ago you wrote on this list:
>> Samples should never reach saturation (+-32767) and should generally
>> be less than 16384 to have good results.
> I would like to use Speex in 8 kbps narrowband mode to compress an
> audio signal (speech) with several peaks up to +-24000. Would it make
> sense to reduce the volume by 3 dB before feeding it to Speex and
> increasing it again afterwards? I did a few tests without noticing
> much difference. Is it therefore sufficient if 90% of the samples are
> in the +-16384 range?
> Thank you,
> Daniel
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