Displaying 20 results from an estimated 2000 matches similar to: "RTC Client (maybe VAD related)"
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
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
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
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
2004 Sep 27
2
Speex VAD algorithm
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<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7226.0">
<TITLE>Speex VAD algorithm</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/rtf
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
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
2006 Jun 30
9
User engine problems with 1.1.4 + Test driven development??!
The following two posts (at the bottom) were posted to engine-
users@lists.rails-engines.org and suggests further issues with 1.1.4
I''m forwarding it here for two reasons:
1. Just a heads-up that 1.1.4 breaks engines that are customised.
login/user_engine are probably almost as widely deployed as Typo, and
if you''ve done any controller-level customisation, 1.1.4 appears to
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 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
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
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 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
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
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 Sep 19
1
Silence suppression /RTP VAD and Asterisk? Dropped calls on IP-500
Hello,
I run Asterisk in a 100% VOIP installation with the Polycom IP-500 phones.
Every once and a while I have problems with either dropped calls
between Asterisk and my provider, or invalid RTP audio streams with
phones behind NAT. I have had a few Asterisk developers look into my
installation and even my provider check my setup but still am having
problems. They tell me that I need to
2013 Jan 16
1
Newbie question on VAD
Hi,
I'm interested in speech recognition and it occurred
to me to try to use VAD to automatically detect the start of speech
prior to feeding the stream to the recognition engine.
Speex has a preprocessor capability which presumably could be
used for this, but I did not see similar in my quick perusal of Opus
docs.
First, is this is a dumb idea for some reason? If not, should I just use
2006 Oct 24
2
vad changes
Jean-Marc,
So I saw in the latest code that the vad in the preprocessor is
gone/going to be re-written. Is there a plan as far as this goes?
Just wondering as the current one seems to work pretty well.
Thanks!
Tom
______________________________________________
Tom Harper
Lead Software Engineer
SightSpeed - <http://www.sightspeed.com/>http://www.sightspeed.com/
918 Parker St, Suite A14
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