Speex dev - May 2009 - how to improve the voice quality (run speex on ADSP-BF533)

I bought a ADSP-BF533-EZkit-LITE V2.1 to develop a speech codec application
using SPEEX. I have tested SpeexEcho project from both BlackfinSDK-Rel201 and
BlackfinSDK-Rel310.

When disabling SPEEX processing, i.e. using PASS-THROUGH mode, the output voice
is ok, which is exactly as the input voice. However, when enabling SPEEX
processing, the output is bad, no matter how to set the parameters in the
InitializeSpeex() function.
For example, we set: 
  tmp=1;
  speex_decoder_ctl(g_pvDec, SPEEX_SET_ENH, &tmp);
  tmp=1;
  speex_encoder_ctl(g_pvEnc, SPEEX_SET_VBR, &tmp);
  tmp=8;
  speex_encoder_ctl(g_pvEnc, SPEEX_SET_QUALITY, &tmp);
  tmp=3;   
  speex_encoder_ctl(g_pvEnc, SPEEX_SET_COMPLEXITY, &tmp);
(the other parameters are preserved as default.)

Would you like to help me to solve this problem? or send me some renewed speech
codec demoes can work better on BLACKFIN DSP please.
I also noiticed that somebody met the same problem unsolved, see:
http://www.blackfin.org/phorum/read.php?1,8138,8138#msg-8138



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Are you getting the same quality as the samples in
http://www.speex.org/samples/
If not, it's most likely a bug in your code. I suggest you start from
sampleenc/sampledec (in the manual) or testenc.c

	Jean-Marc

Young Free a ?crit :
> I bought a ADSP-BF533-EZkit-LITE V2.1 to develop a speech codec
> application using SPEEX. I have tested SpeexEcho project from both
> BlackfinSDK-Rel201 and BlackfinSDK-Rel310.
> When disabling SPEEX processing, i.e. using PASS-THROUGH mode, the
> output voice is ok, which is exactly as the input voice. However, when
> enabling SPEEX processing, the output is bad, no matter how to set the
> parameters in the InitializeSpeex() function.
> For example, we set:
>   tmp=1;
>   speex_decoder_ctl(g_pvDec, SPEEX_SET_ENH, &tmp);
>   tmp=1;
>   speex_encoder_ctl(g_pvEnc, SPEEX_SET_VBR, &tmp);
>   tmp=8;
>   speex_encoder_ctl(g_pvEnc, SPEEX_SET_QUALITY, &tmp);
>   tmp=3;  
>   speex_encoder_ctl(g_pvEnc, SPEEX_SET_COMPLEXITY, &tmp);
> (the other parameters are preserved as default.)
> Would you like to help me to solve this problem? or send me some renewed
> speech codec demoes can work better on BLACKFIN DSP please.
> I also noiticed that somebody met the same problem unsolved, see:
> http://www.blackfin.org/phorum/read.php?1,8138,8138#msg-8138
>  
>  
>  
>  
> 
> 
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> 
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