[speex-dev] Quality

Rick Kane rkane at delcomsys.com
Wed Feb 26 12:43:57 PST 2003

I was also wondering if there is a standard set of input sequences people
are using to test Speex.  I haven't stumbled upon it/them yet.

> -----Original Message-----
> From: owner-speex-dev at xiph.org [mailto:owner-speex-dev at xiph.org]On
> Behalf Of Jean-Marc Valin
> Sent: Tuesday, February 25, 2003 7:24 PM
> To: speex
> Subject: Re: [speex-dev] Quality
> > I was wondering if the developers were using anything to
> "objectively" test
> > the quality of the speex vocoder.  For instance PSQM or one of the many
> > derivatives.  Mean Opinion Scoring seems an expensive route.
> >
> > Is there some open source software to use for this?
> Well, I haven't found and open-source perceptual testing software, so
> I've relied so far mostly on listening and SNR/segmental SNR.
> If anyone has access to this kind of software, I'm interested to
> comparisons between different versions of Speex, mostly 0.4.0, 0.6.0,
> 0.7.0 and rc2. Even for those who only have their own ears, I'm
> interested on comments about possible regressions, mostly for the 8 kbps
> mode (--quality 4 setting or --lbr for version 0.4.0).
> 	Jean-Marc
> --
> Jean-Marc Valin, M.Sc.A.
> LABORIUS (http://www.gel.usherb.ca/laborius)
> Université de Sherbrooke, Québec, Canada

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