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Discussion Groups | Echo Cancellation
Technical discussions about echo cancellation and adaptive filtering in general.
Search Results for "aec"
G.167 compliance of an AEC
Akshu Agrawal - Jul 29 2005
Hello all,
I am working on an acoustuic echo canceller project and I require my AEC to be G.167 compliant. Please let me know on what essential parameters should i test my ... 
implement AEC on DSP
popf...@gmail.com - Jun 13 2007
Hi,all
I have implement an AEC algorithm (Frequency Domain NLMS) on DSP (TI c5509), but when I test it in real room the ERLE is 16dB(with white noise), will test by compositive... AEC Testing speech samples [3 Articles]
sunvict - Dec 1 2003
Hi,
I need some speech samples to test my AEC algorithm. Can any one
send me some sample files. Which is the best algorithm we can use
for handsfree echo cancella... noise suppression + echo cancellation [3 Articles]
Mukul Bhatnagar - Sep 30 2002
Hi All
I had another question,
in order to make an echo cancellers performance more
robust in noise, if we integrate it with a noise
suppression algorithm- for ... Test signals for acoustic echo canceller
Satyanarayana PK - Jan 7 2003
Hello all,
We are working on acoustic echo canceller(AEC). We have
finished the development work and tested it for simulated signals.
Now we want to test the same... How to simulate room response in G.167 AEC?
dingkesun - Dec 7 2005
Hi, All
I¡¯m doing a project about G.167 compliant AEC. In the standard, it
says:
For teleconference systems, the reverberation time averaged over the ... How to simulate the echo in G.167 AEC specs?
ding...@hotmail.com - Dec 6 2005
Hi, All
I'm currently doing a project on G.167 compliant AEC.
For teleconference systems, the reverberation time averaged over the transmission bandwidth shall be typ... AEC performance measures
hetal_nayan - May 17 2003
Hello all,
What are the performance measures besides G.167 that
need to be considered for good perceptual quality
speakerphone?
Thanks!
Nayan Gaywala... Residual Echo suppression for AEC
seshagiri_kodandapani - Nov 21 2003
Hi all,
Where can I get any information on residual echo suppression techniques for
Acoustic Echo canceller implemented in "time domain".
Thanks
Seshagiri... Re: Peak search doubts.....
gt4605c - Feb 12 2002
Dharmendar, Muk:
Check out the following TI Application Note: SPRA322
It describes an AEC using a centered adaptive filter.
The adaptive filter is centered ... Does anybody know where I can get C source code for the AEC? [5 Articles]
zhang_zhh - Jun 21 2002
Hi all,
I am working on the H323 VoIP terminal in the PC environment. but
in order to cancel the echo from speaker even from the headset(I am
not sure if this ... RE: Acoustic echo simulator [7 Articles]
Vladan Bajic - Jun 11 2004
Hi Anandh,
Try http://www.esat.kuleuven.ac.be/~rombouts/demo/aec.html or
http://www.ee.ucla.edu/~dsplab/index.html
There is a lot of them on the web. Hope... Howling rejection
Pierre Audenard - Oct 16 2001
Hello
My aim is to set up a howling detector (and canceller)
I tried an adaptive IIR notch filter (using LMS), but I have still problems with
this system (due ... acoustic echo cacellation performance? [2 Articles]
andrew_xiang - Sep 12 2003
Anyone implemented a system that get you 30dB of reduction for AEC?
In my system, I only get 4X for voice signal. I will give it a try
with white noise. But seem... Re: Background noise reduction in audio conferencing
mike ts - Jul 1 2005
Vijay, see AEC at www.miketdspsolutions.com. it
contains fixed-point implemenation of NR in source
code. for the theory, look at the papers of Patrick J.
Wolfe and Simon J... How to synchronize the reference signal and the echoed signal?
Ding Ke - Dec 15 2005
Hi All
I write a sound recording tool to generate the test vector for AEC. First,
a sound file is played as the reference signal (far end speaker) through
the loudspe... How to design decorrelation filter
dqkngoc - Apr 21 2006
Hi everyone,
It's glad for me to become a new member in echocancel group that i am
also working on this problem. I want to simulate AEC algorithm using 2
pcm audio file for ... Re: Noise Removal for VOIP
mike ts - May 16 2005
see source code for MMSE Ephraim-Malach-type
implementation of the Noise Reduction algorithm in
G.167 AEC code on www.miketdspsolutions.com.
regards,
michael.
-... Echo cancellation using 2 microphone
dqkn...@yahoo.com - Jun 11 2008
Hi everyone,
I am involving in the Echo cancellation using 2 microphones. The main mic (mic1) is placed near local speaker while the another (mic2) is near the echo and noise so... RE: acoustic echo cancellation performance? [2 Articles]
Shaw, David G David - Sep 12 2003
From experience you should not count on echo cancellation
like you expect from the LEC numbers you may be familiar with.
Measure the microphone noise floor and make... Re:Re: Does anybody know where I can get C source code fo r the AEC?
- Jul 23 2002
Hello Maximus,
There are algorithms that do not rely on level differences to determine if
double-talk is present. These algorithms do not suffer from input level
... software based echo-cancelling [3 Articles]
kurt böler - Aug 9 2001
Hi all!
I would like to write the code for a software-based accoustic echo-canceller, to cancel out the accoustic echo that occurs due to the speech ... Re: Acoustic Echo Canceller Source Code
Curl - Dec 20 2001
It seems too easy !! :) :) :) ..
I've been working on AEC for 6 months and if there was efficient code on the
web, i would not be paid for it .. :) :)
Try your DS... Re: Double Talk Detector [2 Articles]
HK - Nov 15 2001
Hi,
What are the differences for a DTD for AEC and LEC
G.168?
hk
--- Atanu Guchhait <> wrote:
> hi,
> there are several methods for DTD like,
> 1)The G... Re: modeling of echo path [2 Articles]
Shiv Garg, Gurgaon. - Feb 26 2002
Hi all !
I hope this fw mail will solve your problem.
Also there is a function, impresp available with room software. try using
it. I have used it, and it w... Re: ERLE definition [2 Articles]
mukul07 - Oct 1 2002
To put my question in another way, if I was told to develop an AEC
algorithm for say a room for which the 60 dB decay occurs at 270
msec, and the ERLE requirement s...