[Speex-dev] Fwd: Re: Fixed Point on wideband-mode: Single Frame loss on 2000 Hz sine causes "freak off"

[Jean-Marc Valin]

Quoting Frank Lorenz <Frank_wtal at web.de>:
> do you have any other ideas what to look for? Or do you currently debug
> yourself? As I already wrote, I'm out of ideas...

I've been busy with other things (like a CELT release), so I haven't had time to
look at it. The only thing I can think of is to look at what's happening in the
fixed-point that's different from what the floating point does.

Cheers,

   Jean-Marc

> best regards,
> Frank
>
>
>
> Frank Lorenz <Frank_wtal at web.de> hat am 18. Januar 2010 um 16:39 geschrieben:
>
> > Yes, I did.
> >
> > As mentioned earlier, only the enhancer inside the docoder produces a lot
> of overflow messages (it points to lines 68 and 69 inside ltp.c). When I turn
> the enhancer of (via SPEEX_SET_ENH control), the codec runs without any
> messages from the FIXED_DEBUG thing, regardless if the output signal is o.k.
> or not.
> >
> > best regards,
> > Frank
> >
> > Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> hat am 16. Januar 2010 um
> 01:41 geschrieben:
> >
> > > Did you run the encoder with the fixed-point debug option?
> > >
> > >         Jean-Marc
> > >
> > > On 2010-01-14 11:11, Frank Lorenz wrote:
> > > > Hi again,
> > > >
> > > > I tested lower cumul_gain limit values. In fact, I reduced the value to
> 240000, 230000, 220000, ..., 20000, 10000, 5000, 2000, 1000, 500.  (quality
> 7, complexity 2)
> > > >
> > > > For input signal 2000 Hz, the values 190000, 130000, 60000, and 1000
> look o.k., all others don't. For 500, the (zoomed out) waveform shows some
> kind of amplitude ripple -- i think, this value is definetely too low.
> > > > I tested the good values for 2200 Hz input, too. Only the value 1000
> looks more or less o.k. (no huge instability, but some kind of visible
> "artifact" inside the fade in after the frame loss), for the other values the
> codec is not stable.
> > > >
> > > > So, this does not seem to be a solution. Any further ideas what to
> test?
> > > >
> > > > best regards,
> > > > Frank
> > > >
> > > >
> > > > Jean-Marc Valin<jean-marc.valin at usherbrooke.ca>  hat am 14. Januar 2010
> um 13:15 geschrieben:
> > > >
> > > >> What happens if you change that line:
> > > >>
> > > >> if (cumul_gain>  262144)
> > > >>
> > > >> to use a smaller value? What value works OK (if any)?
> > > >>
> > > >> One more thing, when things go wrong, do they eventually go back to
> > > >> normal or does the codec never recover? It's unavoidable that the
> audio
> > > >> goes bad for a short period of time because of the long-term
> predictor.
> > > >>
> > > >>          Jean-Marc
> > > >>
> > > > ______________________________________________________
> > > > GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT!
> > > > Jetzt freischalten unter http://movieflat.web.de
> > > >
> > > > _______________________________________________
> > > > Speex-dev mailing list
> > > > Speex-dev at xiph.org
> > > > http://lists.xiph.org/mailman/listinfo/speex-dev
> > > >
> > > >
> > >
> >
> > ___________________________________________________________
> > Preisknaller: WEB.DE DSL Flatrate für nur 16,99 Euro/mtl.!
> > http://produkte.web.de/go/02/
> >
> > _______________________________________________
> > Speex-dev mailing list
> > Speex-dev at xiph.org
> > http://lists.xiph.org/mailman/listinfo/speex-dev
>
> ____________________________________________________________________
> Hilfe für Haiti! Spende per SMS: Sende UI HAITI an die Nummer 81190.
> Von 5 Euro je SMS (zzgl. SMS-Gebühr) gehen 4,83 Euro an UNICEF.
>
>
>