[CELT-dev] llcon software using CELT

Volker v.fischer at nt.tu-darmstadt.de
Thu Aug 20 22:07:55 PDT 2009

Gregory Maxwell schrieb:
> Hm? If you call celt_decode with a null pointer in place of the data
> it should fade out the audio after consecutive losses.
> The relevant code is around line 1286 in celt.c:
>    for (i=0;i<C*N;i++)
>       freq[i] = ADD32(EPSILON, MULT16_32_Q15(QCONST16(.9f,15),freq[i]));
If I interpret your code correctly, you use an exponential decay for the 
fade out. In previous software projects I did something similar and got 
strange effects when I applied a multiplication to very small floating 
point values. I guess the same happens here, too. You should introduce a 
bound for the floating point values. If the signal is below the bound, 
set the floating point value to zero and the problems should disapear (I 
guess ;-) ).

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