Displaying 20 results from an estimated 4000 matches similar to: "Echo Cancellation"
2007 Jul 02
2
Backup Echo Suppression
On Jul 2, 2007, at 7:34 PM, Jean-Marc Valin wrote:
> Selon "Coffey, Michael" <mcoffey@avistar.com>:
>> Believe me; I've "played with" priorities and buffering.
>
> Then either you haven't played well enough or you're using a
> braindead OS.
This is sort of what I was talking about with nibbling. Imagine you
have a microphone sampling
2007 Jul 02
1
Backup Echo Suppression
On Jul 2, 2007, at 9:48 PM, Jean-Marc Valin wrote:
> Selon zmorris@mac.com:
>> But if the echo canceler IS using each frame's timestamp when it's
>> trying to converge, it's almost guaranteed to fail on most operating
>> systems, because the timestamp has such a high variability between
>> frames, and can even sometimes be 0 for the output buffer in this
2007 Jul 02
0
Backup Echo Suppression
Selon zmorris@mac.com:
> This is sort of what I was talking about with nibbling. Imagine you
> have a microphone sampling at 128 samples at a time, filling a 256
> byte buffer, and you have a player that writes 256 samples at a time,
> or 512 bytes. You have to nibble a frame every 160 samples, so you
> get this, where each digit represents 32 samples, so 00000 is 160
>
2008 Sep 12
1
Echo Cancellation not working on WinCE
Hello Friends,
I am trying to use speex-1.2beta3 version for echo cancelling.
On my WinCE board I am using WaveIn/WaveOut functions to record and playback
audio.
I am receiving audio data on udp socket, then playing it on speaker using
WaveOutWrite function.
I registered callback to capture microphone data, then data chunk came from
socket ( which I played on speaker) and data captured from
2010 Dec 15
2
Echo Cancellation Problem - Invalid Argument?!?
Greetings folks-
I'm experiencing issues with a freshly installed box. When a call comes in via PRI (Sangoma AFT-A104), I see this in my logs:
[Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo cancellation on channel 12 (Invalid argument)
[Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo cancellation on channel 8 (Invalid argument)
[Dec 15 14:26:10]
2007 Jul 02
3
Backup Echo Suppression
Believe me; I've "played with" priorities and buffering.
Did you just say you have no idea how the Speex residual echo suppressor works? If that is the case, can you tell me where I could get some information about it?
-----Original Message-----
From: Jean-Marc Valin [mailto:jean-marc.valin@usherbrooke.ca]
Sent: Friday, June 29, 2007 7:38 PM
To: Coffey, Michael
Cc:
2006 Feb 08
3
more cpu intensive echo cancellers ?
Hi,
I've had some decent luck with the mark3 echo canceller from the zaptel
driver, echos on about 20% of the calls, people I've called say I sound
great now, but our side hears echos.
I was wondering if there was any way to tweak the current software
cancelers into using more CPU (and hopefully doing a better job, close
to a hardware canceler), I only have 10 lines, and a single call
2011 May 12
1
Disabling echo cancellation by software
Dear, I have Asterisk 1.6 with an E1 Digium card with echo
cancellation module. So I need to use just the echo cancellation by
hardware and disable the echo cancellation by software. I use DAHDI
for my telephony hardware.
If the lines involved with echo cancel are:
In /etc/dahdi/system.conf:
echocanceller=mg2,1-15,17-31
In /etc/asterisk/chan_dahdi.conf:
echocancel=yes
echocancelwhenbridged=no
2005 Aug 18
2
Hardware echo cancellation
Anybody using hardware echo cancelers a PRI at a time ?
What did you use ? How much did they cost ? Where'd you get em.
Tell us about them !
Alan
2009 Aug 25
2
Echo
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body bgcolor="#ffffff" text="#000000">
I recently upgraded my Asterisk system to Dahdi and now I have an echo
<br>
problem.
<br>
<br>
I am running Asterisk 1.4.25 with Dahdi Complete 2.2.0, on a Digium
<br>
TE121B PCI express
2009 Mar 30
2
[PATCH 1/1] v2 Add Diagnostic MBR for trouble-shooting
---
mbr/Makefile | 6 +-
mbr/mbr-diag.S | 372 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 377 insertions(+), 1 deletions(-)
create mode 100644 mbr/mbr-diag.S
diff --git a/mbr/Makefile b/mbr/Makefile
index 0bdf7e3..b9d743d 100644
--- a/mbr/Makefile
+++ b/mbr/Makefile
@@ -17,7 +17,7 @@
topdir = ..
include $(topdir)/MCONFIG.embedded
-all: mbr.bin gptmbr.bin
2006 Jun 15
2
Will the echo canceler or preprocessor work with 10ms frames?
I am trying to use the speex echo canceler and preprocessor with
sipXtapi to develop a sip user agent. the sipXmedialib call flow graph
uses 10ms frames and I am not sure what the implications are if I try to
change this. The documentation seemed to indicate that a 20ms frame was
recomended, but it didn't go into the consquences of using other frame
sizes. We are going to use headsets
2005 Oct 11
3
R: echo cancellation
On Tue, 11 Oct 2005 10:36:51 +0200, Jean-Marc Valin
<Jean-Marc.Valin@USherbrooke.ca> wrote:
> Source code at:
> http://people.xiph.org/~jm/speexclient/
I rewritten my program so it is more similar to yours, I grabbed your code
for storing and retrieving echo, and I have better results, I think the
echo is cancelled in about 50% but it still can be heared. I think there
is a
2010 Nov 27
1
DAHDI 2.4.0 produces HDLC errors with echo canceler
Hi,
After upgrading to DAHDI 2.4.0 from Zaptel, I noticed a lot of HDLC
errors on my console:
[Nov 27 01:15:09] NOTICE[2743] chan_dahdi.c: PRI got event: HDLC Bad
FCS (8) on Primary D-channel of span 1
[Nov 27 01:15:09] NOTICE[2743] chan_dahdi.c: PRI got event: HDLC Abort
(6) on Primary D-channel of span 1
These errors prevented calls from being made and received on my PRI spans.
This seems
2005 Oct 11
0
R: echo cancellation
Hi,
I implemented the echo cancellation from speex in my Windows VOIP-client VoIPerized --> www.voiperized.com
Greetings Jeroen de Kleijn
-----Original Message-----
From: speex-dev-bounces@xiph.org on behalf of hs
Sent: Tue 10/11/2005 4:02 PM
To: speex-dev@xiph.org
Cc:
Subject: Re: R: [Speex-dev] echo cancellation
On Tue, 11 Oct 2005 10:36:51 ?, Jean-Marc Valin
2005 Oct 11
2
R: echo cancellation
Hi,
Indeed I too have troubles implementing echo removal,
I like ask kindly to Jean-Marc (or any other) if him can put a source code
demo to show us how to use effectively echo removal API and parameters in
real case scenario.
A big thank you!
Roberto
-----Messaggio originale-----
Da: speex-dev-bounces@xiph.org [mailto:speex-dev-bounces@xiph.org] Per conto
di hs
Inviato: marted? 11 ottobre
2010 Sep 15
3
Echo on Sangoma A400 and background noise
I'm a long time user of Digium carts and stupid me i wanted to give Sangoma
a try.
We got Sangoma A400 with 6 FXO ports.
Asterisk version: 1.4.35
Zaptel version: 1.4.11
Wanpipe version: 3.5.11
we tried to use fxtune but looks like it wont work with Sangoma card, (
please correct me if i'm wrong)
Echo is really bad and also we have background noise on all lines.
We tried both mg2 and
2013 May 16
1
wanpipe and digium, oslec and hardware echo canceller
Hello All;
Wanpipe is working only with sangoma cards so it does not work with digium cards?
Also, who is better: to have echo canceler built in with the hardware or using olsec?
Regards
Bilal
2006 May 10
2
Speex echo canceller on TI C55 DSP
> Build 11387 produces the same result as my modified build 11343. Because of
> compiler limitations in the TI tools, I did have to make modifications to
> pseudofloat.h (separating return of float values) and nb_celp.c (adding
> braces around a variable declaration in the middle of code). I have
> attached a patch. You might prefer to do the nb_celp.c change in a
>
2011 May 25
1
pre-processor's residual echo suppression and AEC order
Hi,
Arun and me are working on a echo-canceler module for pulseaudio build around
speex. When using the preprocessor's echo filter, specifically in combination
with denoise and AGC, it's unclear whether these have to run before or after
the AEC.
Right now we've got one instance of speex_preprocessor doing AGC and denoise
running before the echo canceler; and a second for echo