Fw: [Speex-dev] Voice Activation Level (speex 1.1.11.1)

[Lis]

I done it
speex_preprocess_ctl(sppPreprocess, SPEEX_PREPROCESS_GET_PROB_START, 
&g.s.VADstart);
  speex_preprocess_ctl(sppPreprocess, SPEEX_PREPROCESS_GET_PROB_CONTINUE, 
&g.s.VADcontin);
  /*char *lisDebugCh = (char*) malloc(20);
  int decimalFcvt, signFcvt;
  static int firstDebug = 1;
  lisDebugCh = gcvt(g.s.VADstart, 20, lisDebugCh);
  if(firstDebug == 1)
   {
   ::MessageBoxA(NULL, lisDebugCh, "Mumble", MB_OK | MB_ICONERROR);
   firstDebug = 0;
   }*/
  g.s.VADstart = 0.90f;
  f.s.VADcontin = 0.90f;
  speex_preprocess_ctl(sppPreprocess, SPEEX_PREPROCESS_SET_PROB_START, 
&g.s.VADstart);
  speex_preprocess_ctl(sppPreprocess, SPEEX_PREPROCESS_SET_PROB_CONTINUE, 
&g.s.VADcontin);

but nothing is changed. The microphone is activated at same
loudenes as before and i dont understand why.
It seems to look like that i can get throught the whole speex code.

I now try Toms solution. After that i will try to find out how
the speech_calculate_vad() function is workin.
Tanks for your help, thanks for your time.

----- Original Message ----- 
From: "Steve Kann" <stevek at stevek.com>
To: "Lis" <lis at 1234567890qwertzuiopasdfghjklyxcvbnm.de>
Cc: <speex-dev at xiph.org>
Sent: Thursday, March 02, 2006 3:33 PM
Subject: Re: [Speex-dev] Voice Activation Level (speex 1.1.11.1)


>
> Lis,
>
>    The Voice Activity Detection (VAD) algorithm in the speex preprocessor 
> does not work simply by detecting the energy level (volume or loudness) in 
> the audio frames, but it uses a more complex algorithm which (a) tries to 
> ignore background noise, and (b) tries to detect speech, in particular, 
> and not just energy.
>
>    If you need to adjust the sensitivity of this, you can use these 
> settings:
>
> #define SPEEX_PREPROCESS_SET_PROB_START 14
> #define SPEEX_PREPROCESS_GET_PROB_START 15
>
> #define SPEEX_PREPROCESS_SET_PROB_CONTINUE 16
> #define SPEEX_PREPROCESS_GET_PROB_CONTINUE 17
>
> which adjusts the 'probabilities' that are used to define speech and 
> non-speech, for the start of speech, and to continue speech.
>
> -SteveK
>
>
> Lis wrote:
>
>> Sorry.
>>
>> I forgotten the words volume or loudness.
>> But it is know as microphone stroke too, i think.
>> If something can tell me something about that
>> procedure it would complete my pleasure.
>> To bring back memories,
>> i only wanted to know wheather i can change a
>> variable that holds the sound intensity (loudness)
>> needet to start "encoding >> sending" if the speex codec
>> is in voice activation mode.
>> If that isnt implementet yet it would enjoy me
>> to get information about the preprocess->loudness2
>> for example, or a function (if the lib contains one) that returns a value 
>> whitch equals to the overall
>> loudness of a frame.
>>
>> So i can do some simple interactions with users
>> whitch doesnt want to yell in their microphone
>> for talking something.
>> Other ones got headsets that record their breathing
>> and anyone can listen to.
>> This is not funny the whole day...
>>
>> Greets Lis
>>
>> ----- Original Message ----- From: "Jean-Marc Valin" 
>> <jean-marc.valin at usherbrooke.ca>
>> To: "Lis" <lis at 1234567890qwertzuiopasdfghjklyxcvbnm.de>
>> Cc: <speex-dev at xiph.org>
>> Sent: Thursday, March 02, 2006 2:35 AM
>> Subject: Re: [Speex-dev] Voice Activation Level (speex 1.1.11.1)
>>
>>
>>> Please define what you mean by "voice activation level".
>>>
>>> Jean-Marc
>>>
>>> On Thu, 2006-03-02 at 02:22 +0100, Lis wrote:
>>>
>>>> I havent had found anything in the documentation about voice
>>>> activation levels.
>>>> Does i can change a variable to change the accuracy for activations?
>>>>  If not does the speex lib already implement a function for read out
>>>> the
>>>> sound level of a frame?
>>>>  Thanks for the advance.
>>>>  Lis (Louis Hoefler)
>>>> _______________________________________________
>>>> Speex-dev mailing list
>>>> Speex-dev at xiph.org
>>>> http://lists.xiph.org/mailman/listinfo/speex-dev
>>>
>>>
>> _______________________________________________
>> Speex-dev mailing list
>> Speex-dev at xiph.org
>> http://lists.xiph.org/mailman/listinfo/speex-dev
>>
>
>