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Discussion Groups | Echo Cancellation
Echo Cancellation in PSTN (Hybrid Echo)
saqirashi - Aug 29 2008
Hi,
I am doing my dissertation on Hybrid Echo Cancellation. Can anybody
tell me which is the best algorithm for this purpose? And if anybody
has done any work on this topic ... 
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... Echo cancellation for VoIP
stas...@mail.ru - Jan 14 2008
Hello!
Some of the authors say that to cope with echo in VoIP-enabled network, an echo canceller with the increased number of taps is needed. They deem so because of the fact that... Choosing the Right Processor !
"karthik S.P" - Dec 14 2007
--
hi guys !!
Here is the application :
Implementation of Acoustic Echo Cancellation + Noise Suppression .
Could u guys suggest me which is the best optimized DSP/DS... Echp Path Transfer Function [2 Articles]
stas...@mail.ru - Dec 2 2007
Hi all! Where can I get some typical echo path responses or transfer functions to test echo cancellation algorithms with?
... NETWORK EC-LMS/RLS [6 Articles]
gane...@gmail.com - Aug 10 2007
Hi All,
I'm doin a project on NETWORK ECHO CANCELLATION and need help to choose the best ADAPTIVE ALGORITHM.
Everywhere its said, RLS is the best adaptive algo as well t... MC-Echo Cancellation using BSS, examples? [2 Articles]
princess_ameirah - Jun 13 2007
Hello,
I was wondering if anyone has any idea about MC-echo cancellation
using BSS, and if there are any available demos or algorithms. I found
the ECoBliSS file of Schobben... 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... Simulating an echo canceller [3 Articles]
stas...@mail.ru - Jun 5 2007
Hi!
I am new to the subject. Could anyone tell me how to simulate an echo canceller? I mean, if I want to develop a new device, what software tools can I use to model it before it... Echo Cancellation & Environment Calibration
jeffhcliu - Jun 4 2007
Hi everyone!
Please allow me to start off by clarifying that I have very very
little knowledge on the subjects of DSP and echo cancellation and
please forgive me if I sound ig... design of conferene phone system
alke...@gmail.com - Apr 17 2007
> Hello. I need to produce an outline (top-level block diagram) design of
> conference telephone system such as those marketed by Polycom. How do I
> select the signal process... lms code
jays...@yahoo.com - Sep 4 2006
hi ive tried writting an lms code as a part of my final year proj.The code models a general near end - far end system. With the far end mic only transmitting an echo signal.However... echo cancellation in digital video footage
Babylon and Frankie - Aug 7 2006
I am not an echo cancellation professional, however I have done
extensive sound editing. I have a movie that was shot very poorly as
far as sound is concerned and althyoguh I ha... disable tone detector [2 Articles]
msey...@yahoo.com - Aug 3 2006
dear all Hi
i want to know what is disable tone detector and why is it use in echo canceller.
thanks
... Phase Shifter Echo Cancellation
bala...@intel.com - Jun 6 2006
Hi, I am working on 180 degree Phase Shifting Echo Cancellation. I am a newbie to DSP and Digital Filters. FIR filter is one of my option. I would appreciate if anyone could show/g... overlapping of FIR and IFIR filters
anita patil - May 21 2006
Hello,
I am working on adaptive echocanceller. I want to get response of filters which are overlapped i.e. FIR and interpolated FIR filter and also nulling scheme is used.
So... Invitation to Workshop on Real-Time Digital Signal Processing, 5-6 June 2006
"hez...@ieee.org" - May 3 2006
Invitation to Workshop on Real-Time Digital Signal
Processing, 5-6 June 2006.
We are pleased to bring to your kind attention our
forthcoming workshop on REAL-TIME DIGITAL SIGN... Estimating the Impulse Response of the room !!! [2 Articles]
abhishek agarwal - May 1 2006
Hi all,
I'm trying to estimate the impulse response of the room by playing a 4 sec white noise speech file from one end of the room and recording it at the other end. I'm to... Please read - Looking for teachers of DSP
Webmaster - Apr 27 2006
I am creating a new discussion group for teachers of signal processing. The
goal is to bring together as many (D)SP teachers as possible so if they
wish, they can exchange all k... 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 ... impl of Acoustic echo canceller....
jkinf_9 - Mar 16 2006
HII,
I am doing my project work on Acoustic cancellation for path /tail
length of 300 msec.i have few doubts in alg.. implementation i hope
you can help me if any one have w... Composite source signals [3 Articles]
jfa47 - Dec 15 2005
Hi:
I am trying to make a composite source signal for test a echo
canceler, but i can understand a some thinks.
In the G.168 are defined the expresion for pseudo noise ... 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 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... Re:ERLE
ganesa1234 - Oct 26 2005
Dear Friends,
I would like to know what is the recommended level of results that
should be achieved by an echo canceller in terms of Echo Return Loss
Enhancement (ERL... Line Echo Path [2 Articles]
zhan...@yahoo.com - Aug 30 2005
Hi All,
Is there any tool avaiable in Windows platform that can decribe the line echo path? I like to check if the echo path change during the connection in the 2 wire
... LEM simulation [2 Articles]
mgprashanth - Aug 20 2005
1. Any one is having an software to simulate
Loudspeaker-enclousure-microphone(LEM) or room accoustic ?
2. what are the algorithms we use to simulate LEM?
3. any... Special Announcement: GSPx 2005
Webmaster - Aug 9 2005
GSPx is the major (digital and analog) signal processing technology
forum and product exposition covering DSPs, mixed-signal and analog
products, EDA tools, software and app... 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 ... re:echo cancellation query using vc++
shah...@yahoo.com - Jul 27 2005
hi sayed
i thing u r right ,there must be residual echo.now i had read about non-linear processor is it something like nolinear atenuter?/
means what i have to exactly do... echo simulation query using vc++ [2 Articles]
shah...@yahoo.com - Jul 25 2005
hi to all
i am working on acoustiv echo cancellation simulation based on vc++ using nlms algorithm.
i got the result but not up to the mark.i had give wavfile wich has rever... Guard tone & echo cancellers
joeborg123 - Jul 20 2005
Hi all.
Does the guard tone (1800Hz) sent by a v.22bis modem have anything to
do with disabling echo cancellers?
A convincing answer from a TDK datasheet is that "The ... Double talk, Geigel
jfa4...@yahoo.com.ar - Jul 6 2005
Hello:
I am implementing a EC for a university project, and I have some problems to detect double talk condition with the Geigel's algorithm. I am using this expression fo... Background noise reduction in audio conferencing [2 Articles]
vija...@yahoo.com - Jul 1 2005
Hi all,
Presently I am working on the background noise suppression and voice quality enhancement in audio conferencing.Could you please anyone help to get a efficient al... Noise Removal for VOIP [2 Articles]
Deeps - May 13 2005
Hi Guys,
Are there any algorithms for Noise removal like the backgroud noise
for implmentation in voip or for Noise Removal from Speech signals.
Thanks a ton, :-)
De... How to use a EC in real-time streaming case???
snowlovingboy - May 8 2005
I got an EC from the sample codes of INTEL IPP. I want to use it in a
voip endpoint, but I was failed in synchronizing the SPK and MIC
signals of the EC. I wonder know who h... Calculating the Gain Level for AGC
Siddarth - Apr 22 2005
Hi all,
I am trying to calculate the gain level in Automatic Gain Control.
Assuming the input is a speech signal at -10 dB power level, if I want
to change the ... g.168 defenitions [2 Articles]
a_a_...@yahoo.com - Apr 5 2005
hi every body, i want to be familiar with itu-t g.168 recommendation. please introduce me the source of itu-t standards, if possible. i searched the web several times but i d... about dtd
Kousalya - Mar 24 2005
hi,
i am kousalya, newly joined member of this group,i am doing my project on line echo cancellation,i want some information regarding double talk detection alg...