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

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Wed Feb 3 03:50:58 PST 2010

Considering that the input is a sine, I find these glitches a bit odd 
(maybe they also appear in other signals).


On 2010-02-03 05:10, Frank Lorenz wrote:
> You mean the "real" (not the synthesized) residual? What is odd in your opinion? These glitches I mentioned or something else?
> I replaced the interpolated lpc (variable "interp_lpc") with the original lpc (variable lpc) for residual generation. This makes the situation worse, so lpc interpolation seems to "smooth" the error and reduces it. I will check the computation of the lpc and the fir_mem16 routine now.
> cheers,
> Frank
> Jean-Marc Valin<Jean-Marc.Valin at USherbrooke.ca>  hat am 2. Februar 2010 um 17:57 geschrieben:
>> Just had a look and the fixed-point residual *does* look odd. That's worth
>> investigating (though I don't think it's related to LPC stability).
>>      Jean-Marc
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