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Discussion Groups | Echo Cancellation
Technical discussions about echo cancellation and adaptive filtering in general.
Search Results for "168"
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... 
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 ... G.168(06/2002) testing problem
bojuchen2000 - Jul 14 2004
G.168 defines many testing requirements for EC.
I extract one of them as belows.
......the combined loss (L_Rin,act-L_RET) should be greater than or
equal to t... Test Vectors Generation.
d_madhu_rao - May 17 2002
Hello Friends,
1)Can you please suggest me certain methods for generating the Test
Vectors of G.168 standard.
2) What are Hoth noise and Comfort Noise and h... Info regarding G.168 [2 Articles]
Techie Dsp - Jul 6 2004
Hi,
Can I get some links where I can find exhaustive information about
G.168.?
Thanks in advance.
Arun.
___________________________________________________... Number of Echo paths.
Maximus Marcus - Sep 20 2002
Hi all,
I have been working G.168 and I have some doubts
regarding number of echo paths.
1. How many number of (distinct) echo paths (generated
from diffe... Detecting tones in an EC'ed channel
Steve Underwood - Aug 3 2003
Hi all,
Tones really screw up the adaption of an EC. To get through the G.168
tests there seems to be no alternative but to detect that strong
narrowband energ... Re: Training sequences in hybrid echo cancellers
Maurice Givens - Feb 14 2002
The hybrid is not connected until the connection is made when the called
is off hook. Therefore, the called party would hear the training
sequence. This is consider... LEC behavoiur for music
- Dec 9 2002
hi,
what is the behaviour of G.168 LEC for music signals(i mean songs in far end)?
Where can i get information about this?
regds,
jagadees
... Reference code for G.168 [2 Articles]
- Jun 21 2004
Message
Hi,
Where can I get any reference code/documentation on implementation of G.168 echo canceller.
T... Re---Training sequences in hybrid echo cancellers
Sudarini Pushparajah - Feb 12 2002
Sorry, to let me make this more clear. To use a white training sequnece in
the absence of DT.
-------------------------------------------------------------------... Power Measurement Device
d_madhu_rao - May 19 2002
Hello Friends,
Here I am with a doubt which I would like to clarify from you.
What is the detector - indicator unit in the power measurement device
as indic... Re: Echp Path Transfer Function
stas...@mail.ru - Dec 4 2007
I found them in G.168. But in my case there is a VoIP segment and I believe it will have some influence in the echo path response. I would be grateful if someone told me whether or... Power measurement [8 Articles]
vinprakash366 - Feb 1 2002
Hi all,
In the G.168(2000) standard, under section 6.4.1.2.1, level
measurement device, i am a little confused abt the detector-indicator
block. How should thi... Signalling Tones
Ananda Basak - Mar 11 2002
Hi Friends,
can U give me some refference for signalling system No. 5,6 & 7 as
mentioned in sec 6.4.2.9 : Test no8 of G.168 standard.?
Actually I want to know whe... Re: details about the test vector [2 Articles]
vikash saraogi - Jul 24 2003
You have to get yourself registered on the ITU-T
website and after that they will allow you to download
a couple of ITU-T standards. You can select the echo
cance... mips problem?? [4 Articles]
akash damodar sureka - Oct 2 2001
hello everyone,
i am working on echo cancellation.
i have completed the g.165 and g.168 complaince echo canceller.
can somebody tell me how much mips does n... error signal
John Lai - Feb 20 2002
Hello All,
Suppose I want to test if echo is induced during transmission through a network.
I send a predetermined messsage from the farside and on the nearend, I c... Re: Echo path models
maurice givens - Nov 5 2001
Look in ITU Recommendation G.168 (2000). There are 7 echo path models
included in the Recommendation. Your library should have the
Recommendation, or can get it for... Re: How to Specify TailLen
Maurice Givens - Aug 26 2002
Suryadi,
Your use of a echo-path (tail) length of 30 ms to 62 ms is very restricted, and
far less than the accepted. To see how to apply the echo length, I suggest ... Re: Acoustic echo simulator [6 Articles]
bojuchen2000 - Jul 6 2004
Hi:
I have a question.
What is the difference between acoustic echo cancellation and G.168?
Are they the same?
BJC
--- In , "Vladan Bajic" 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: Reflections & multiple tail circuits
Maurice Givens - Sep 16 2002
If you are refering to the multiple tail circuits listed in ITU Recommendation
G.168, these are indeed separate reflections. These represent reflections from
multip... Re: ERLE definition [5 Articles]
Maurice Givens - Oct 1 2002
From ITU Recommendation G.168 (2002) "Digital Network Echo Cencallers"
Echo Return Loss Enhancement: The attenuation of the echo signal as it passes
through the ...