[Speex-dev] Re: Fixed-point VAD?

[singhui007]

Thank you for your quick reply. I am interested in helping port it to fixed
point (as a school project - I am willing to learn.) What would I have to
do? By the way, what's the difference between the preprocessor VAD and the
built-in one? I heard the preprocessor one is better. Would it possible to
port that to fixed-point as well? Do you think the preprocessor VAD would
work in a real-time encoder or was there a special reason why it was placed
in the preprocessor and not the encoder? Thank you once again!

SingHui



On 12/28/05, Jean-Marc Valin <Jean-Marc.Valin at usherbrooke.ca> wrote:
>
> > I found this message concerning VAD and was wondering whether VAD has
> > been ported to fixed-point in the latest version?
>
> Sorry, VAD is still float, but if you're using the built-in one, float
> emulation should work (it's not very compute-intensive).
>
>         Jean-Marc
>
> > Thanks,
> > SingHui
> >
> > ---------- Forwarded message ----------
> > From: Jean-Marc Valin <Jean-Marc.Valin at usherbrooke.ca>
> > Date: Jul 22, 2005 1:02 AM
> > Subject: Re: [Speex-dev] Fixed-point
> > To: gue baja < gue_baja at yahoo.com>
> > Cc: speex-dev at xiph.org
> >
> > Hi Baja,
> >
> > Here's a quick summary:
> > In narrowband, the encoder and decoder are all ported to fixed-point
> > for
> > CBR between 4 kbps and 18.2 kbps. Only the 2 kbps (vocoder) and 24.6
> > kbps modes still have a few floats left. Most of wideband is also
> > ported, but there are some float operations left. The packet loss
> > concealment is also done, but not the VAD/VBR. The jitter buffer
> > isn't
> > converted, but there's not many float ops there in the first place.
> > The
> > preprocessor and echo cancellor aren't converted and there's lots of
> > float stuff there.
> >
> >         Jean-Marc
> >
> > Le mercredi 20 juillet 2005 à 09:18 -0700, gue baja a écrit :
> > > Is there any place where I can see a summary of what
> > > is being done and what is still pending with the fixed
> > > point version of the libraries?
> > >
> > > I have some experience with vocoders and fairly good
> > > experience with de-jitters and suchs. I may be able to
> > > help.
> > >
> > > Thanks
> > >
> > > Baja
> > > _______________________________________________
> > > Speex-dev mailing list
> > > Speex-dev at xiph.org
> > > http://lists.xiph.org/mailman/listinfo/speex-dev
> > >
> > --
> > Jean-Marc Valin <Jean-Marc.Valin at USherbrooke.ca>
> > Université de Sherbrooke
> >
> > _______________________________________________
> > Speex-dev mailing list
> > Speex-dev at xiph.org
> > http://lists.xiph.org/mailman/listinfo/speex-dev
>
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