[Speex-dev] Clicking Problems with slightly clipped audio

[Jean-Marc Valin]

Floating-point or fixed-point? if fixed-point, could you compile with
--enable-fixed-point-debug (or defining FIXED_DEBUG) and report any
error message?

	Jean-Marc

Coffey, Michael a écrit :
> It appears that both the echo canceller and the noise reducer (NR)
> introduce rather severe clicking artifacts when presented with audio
> that has slightly overloaded the A/D converters. I am talking about
> speech that sounds just slightly distorted, due to clipping, when simply
> played back. If I pass that speech through the echo canceller or the
> noise reducer, it acquires really loud clicks and/or scratchiness in
> high amplitude sections.
> 
>  
> 
> Granted, it would be best if I could avoid any clipping in the first
> place. A problem, though, is that we can not control end user behavior
> and it is quite common for them to have their audio settings slightly
> out of adjustment.
> 
>  
> 
> I've found a workaround, which is to divide everything by two before
> sending it to the AEC or NR.
> 
>  
> 
> Is this a known problem? Would it be helpful for me to send a couple of
> .wav files to illustrate?
> 
>  
> 
> Thanks again for the great contributions.
> 
>  
> 
> -Michael
> 
>  
> 
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Speex-dev mailing list
> Speex-dev at xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev