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

Frank Lorenz Frank_wtal at web.de
Wed Feb 3 02:10:30 PST 2010

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.


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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