[speex-dev] quality -> bitrate

Jean-Marc Valin jean-marc.valin at hermes.usherb.ca
Wed Mar 12 15:15:20 PST 2003

Have a look at Table 4
(http://www.speex.org/manual/node9.html#SECTION00094000000000000000) for
narrowband. Basically, if you can afford the bandwidth, 15 kbps is
almost transparent, while I'd say 8 kbps is "good". 

For wideband (16 kHz), I can say that 27.8 kbps is really near
transparency, 20.6 is good quality and 9.8 kbps (still for wideband) is

The best is to see for yourself. I summarized a couple bit-rates, but
there are intermediate values. There's a total of 8 different bit-rates
for narrowband and 10 for wideband.


Le mer 12/03/2003 à 16:32, Daniel Vogel a écrit :
> Could someone post a mapping of quality to bitrate or provide me with a link
> where to find this information?
> Thanks,
> -- Daniel, Epic Games Inc.

Jean-Marc Valin, M.Sc.A.
LABORIUS (http://www.gel.usherb.ca/laborius)
Université de Sherbrooke, Québec, Canada

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