Displaying 20 results from an estimated 4000 matches similar to: "Newbie question on VAD"
2011 Aug 29
3
Speex VAD always returning 1
From 1.2rc1 source code:
preprocess.c:
/* FIXME: This VAD is a kludge */
st->speech_prob = Pframe;
if (st->vad_enabled)
{
if (st->speech_prob > st->speech_prob_start || (st->was_speech &&
st->speech_prob > st->speech_prob_continue))
{
st->was_speech=1;
return 1;
} else
{
st->was_speech=0;
return 0;
}
} else {
return 1;
}
AND
case
2014 Jun 12
1
VAD always return 1
Hi All,
I am trying to use VAD opption of speex encode on STM32F4 chip. But when I
use *speex_preprocess_run *function, It allways return 1.
Anyone can show me the problem? And please, give me an example about using
VAD.
Thanks in advance,
Regards,
Nhan.
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2006 Oct 24
2
Does VAD/DTX work without VBR and Preprocessor
Hello,
I'm try to run speex on some ARM processor.
I'd like to cut away some speex features including VBR, ABR and preprocessor
while still supporting VAD/DTX.
But I've found some puzzles in the source code regarding VAD as below,
1) there are VAD related codes in the source file preprocess.c.
Will VAD still work If I don't use the source file preprocess.c?
2)The speex manual
2006 Oct 24
1
Does VAD/DTX work without VBR and Preprocessor
Hi Marc,
Thanks for your quick response.
So if VAD is enabled then VBR will be enable although it's a special VBR.
How about take out the VAD code from the VBR and remove the code else?
Lianghu
On 10/24/06, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote:
>
> > 1) there are VAD related codes in the source file preprocess.c.
> > Will VAD still work If I
2007 Jun 07
2
VAD Questions
Hello all:
I am interested in using Speex for an application that streams audio
from a (noisy) source, so I am interested in VAD and DTX operation.
However, after browsing the archives of this list, I note that a
number of people have not been satisfied with the operation of the VAD
algorithm in Speex. This leads me to a few questions:
- Is there a reference somewhere (other than the source
2009 Mar 17
1
VAD speex 1.2rc1
My data is speech sampled as pcm mono 32khz.
I want to use vad for regulating the agc gain mechanism.
So... if voice is not detected I just reduce the agc value
in order to not amplify the 'silence' otherwise we just
increase the agc value if it is below the minimum.
Thanks,
Daniel
----- Original Message -----
De: Jean-Marc Valin <jean-marc.valin at usherbrooke.ca>
Para: danflu at
2003 Oct 14
2
VAD in Asterisk ?
Hi,
Is there is some form of VAD on * for SIP channels, cause I have a
problem with MOH. I made an extension which simply plays MOH, when I
dial that extension with my ATA188 MOH sounds choppy if I talk on the
phone the MOH keeps playing.
I saw the sip channel (show channel SIP/*) and I see no packets going
in/out when I talk then packets shows going in/out.
I don?t have this kind of problem
2009 Jul 27
2
VAD performance worse on version 1.2rc1 than 1.1.12
Hi, I decide to write to the list because of a strange behaviour when
updating from version 1.1.12 to 1.2rc1.
My software was running fine with version 1.1.12, but now I want to benefit
from advances on AEC.
After updating the library to 1.2rc1 and do few changes on my sources, I run
the application and discovered that VAD doesn't work so fine as in previous
version 1.1.12 (3 years ago).
I
2004 Sep 27
2
Speex VAD algorithm
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2008 Aug 19
2
size of speex packets when VAD/CNG is enabled
Hi all,
supposing to have speex working at 3.95, when VAD/CNG is employed, which
is the size of those "silence" samples respect to voice samples?
I am wondering if it could be possible to lower even the transmission of
VAD/CNG samples by specifying "outbound" in the communication channel
only 1 bit instead of sending the whole VAD/CNG packet.
I am doing the same for AMR
2007 Aug 25
1
asterisk and vad/cng
Hi List,
i've set up a cisco 7912 for my asterisk box. I've had problems with
VAD and CNG. After googling a bit, i've found an article about asterisk
not supporting these two protocols, therefore it's better to turn them off.
Since then i did not found answer to my two questions, maybe somebody
here could help me:
a) am i even able to turn off vad/cng on cisco 7912? SIP
2007 Dec 04
3
speex/aec and vad
Hi Aymeric,
> 2 questions:
I count 4 :-)
> * Do you "feel" that the current svn is enough stable
Yes. I'm planning on releasing it as 1.2beta3 this week. Even in normal
time, I try to keep svn in good shape so it is almost always better than
the last release. And even when it breaks, Speex bugs tend to be very
obvious and easy to reproduce (no segfaults that happen once a
2007 Jun 19
2
VAD Algorithm
Has it been a whole week since a question about VAD? :-)
I am curious why the VAD algorithm described in G.729 Annex B is not
used by Speex. Complexity, Patent, Quality, or what?
-mjc
2008 Dec 11
1
preprocessor VAD only rocognize between silence and not silence
Hello,
in my project im using speex 1.2rc1 and the preprocessor VAD seems to
only separate complete silence from not complete silence frames.
The Speex Manual, you can read "The voice activity detector (VAD)
provided by the preprocessor is more advanced than the one directly
provided in the codec."
but if you go to the source code in preprocess.c line 995 "/* FIXME:
This VAD
2005 Mar 08
1
VAD with speex_preprocess()
speex_preprocess() isn't covered in the manual, is it? But, it's very
easy to use. If it returns non-zero, voice was detected.
Tom
"Meir Yeshurun" <mt_yeshurun@hotmail.com> wrote:
>
> I would like to use speex_preprocess() for voice activity detection. I read
> the comments in speex_preprocess.h and the relevant paragraphs in the Speex
> manual. Is there
2005 Dec 26
2
Fixed-point VAD?
Hi,
I found this message concerning VAD and was wondering whether VAD has been
ported to fixed-point in the latest version?
Thanks,
SingHui
---------- Forwarded message ----------
From: Jean-Marc Valin <Jean-Marc.Valin@usherbrooke.ca>
Date: Jul 22, 2005 1:02 AM
Subject: Re: [Speex-dev] Fixed-point
To: gue baja <gue_baja@yahoo.com>
Cc: speex-dev@xiph.org
Hi Baja,
Here's a quick
2008 Apr 16
2
VAD CPU usage
Hi Jean-Marc
I am using speex in my voip app (wideband mode). I
have noticed that when VAD kicks in, CPU considerably
increases (bitrate decreases to 4 kbps). It takes
about 7 ms to encode one frame versus 0.5 ms (for
speech). This happens regardless preprocessor is used.
Although the issue seems to be driver dependent, it
occurs on XP, Vista and Mac OS X.
Besides complexity and quality, this
2009 Aug 10
2
VAD performance worse on version 1.2rc1 than 1.1.12
Hi Cecile,
it seems it is a tabu theme, or nobody uses VAD on speex. I've tried
with external EasyVAD solution but the result was not as spected.
Other users of the list suggest an algorithm to filter voice based on
the power of the signal, but of course, it is not a voice activity
detection.
I am waiting also a solution for this, while so I use version 1.1.12.
Regards.
Cecile Dumotier
2005 Jun 27
1
VAD encoder sensitivity?
Hi,
When using the encoder function, speex_encode_int(st, in_short, &bits),
with VBR disabled and VAD enabled, the function always return a 1.
Also, when enabled DTX along with VAD enabled, most of the time the
function return a 1 even when it is silence.
Is there a way to change the sensitivity of the VAD by changing some
parameters in the source code, so when it is silence, the
2007 Jun 08
2
VAD Questions
Hello Jean-Marc et al:
On 07/06/07, Jean-Marc Valin <jean-marc.valin@usherbrooke.ca> wrote:
> > - Is there a reference somewhere (other than the source itself) that
> > explains how the latest VAD algorithm works?
>
> Read the source, Luke :-) (sorry)
Okay. I had to ask :-)
>
> > - Is it possible to obtain the VAD status of a Speex stream
> >