[Speex-dev] pre-encoding and encoding optimizations

[Andrea]

Hello Jean-Marc,

Thank you for your quick answer! I agree with your suggestions, but I was
thinking more about pre-filtering or pre-processing of the voice file,
before it arrives to the speex encoder. I was wondering if there is some
suggested optimization strategy to improve (at least a little) the perceived
voice quality while lowering a bit the CBR.

Thank you again for your attention,

Andrea



On 10/5/07, Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> wrote:
>
> I guess you can always specify --quality 10, but you won't get 15 kbps
> quality at 11 kbps. Depending on the application though, VBR could be an
> option.
>
>         Jean-Marc
>
> Andrea wrote:
> > I'm sorry if this message is slightly off topic, but I'd like to know an
> > opinion from the speech compression experts reading this list.
> >
> > I'm using spheex to encode human voices at about 15kbps, with very good
> > results. I was wondering if this is the best situation for my setup
> where I
> > have all the voice pre compressed (not in real time) by very powerful
> > servers with (near) unlimited processing time and computational
> resources
> > and a client relatively slow (ARM4 processor at about 70MHz). The
> encoding
> > phase time lenght is not important, I can let it run even for days if it
> > helps compressing the output. The client decodes the data from a static
> > file. My hope was to obtain something of the same quality I'm getting
> with
> > at 15kbps with a lower bitrate, using more computational time and power
> on
> > the encoding phase. The audio source are very clean and very high
> quality.
> >
> > Any hint?
> >
> > Thank you in advance,
> >
> > Andrea
> >
> >
> > P.S.
> > Jean-Marc, I can never say thank you enough for this wonderful software
> >
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Speex-dev mailing list
> > Speex-dev at xiph.org
> > http://lists.xiph.org/mailman/listinfo/speex-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20071009/8d7721b6/attachment.html