Forums

Double Talk Detector

Started by Unknown November 2, 2001

Hello friends,

I am working on Acoustic echo cancelletion. I am facing problems in
selecting DTD(Double Talk Detector). In Acoustic case Giegels'
algorithm does not work, i have tried algorithms based on far and
near end energy estimation but their results varies drastically from
signal to signal.
can someone tell me about abt cross correlation methods or any
other algorithm for DTD.

Thanks in advance.

Regards
Manish



Hi Manish,
Below are some links to correlation based and other DT
detection methods. Hope they are useful

Sudarini
------------

A New Class of Doubletalk Detectors Based on Cross-Correlation
www.bell-labs.com/user/jbenesty/papers/sap_mar2000.pdf

An Objective Technique for Evaluating Doubletalk Detectors in Acoustic Echo
Cancelers.
www.bell-labs.com/user/jbenesty/papers/sap_nov1999.pdf On the Problem of Detection and Discrimination of Double Talk and Change in
the Echo Path.
http://citeseer.nj.nec.com/cache/papers2/cs/2091/ftp:zSzzSzftp.control.isy.liu.s\
ezSzpubzSzReportszSz1995zSz1790.pdf/carlemalm96problem.pdf

Acoustic Echo Canceller with two Echo Path Estimation Filters
http://www-d.connect.ti.com/dsp/tpcat/tpcodec.nsf/SoftwareForExternal/B82D5EC3BB\
3149028625676100702688 A Good website for acoutic echo cancellation and doubletalk detection
papaers.
http://www.tu-darmstadt.de/fb/et/signale/schmidt/literature/papers/echo_cancella\
tion/general/echo_cancellation_general.html

>From:
>Reply-To:
>To:
>Subject: [echocancel] Double Talk Detector
>Date: Fri, 02 Nov 2001 04:53:10 -0000 >Hello friends,
>
> I am working on Acoustic echo cancelletion. I am facing problems in
>selecting DTD(Double Talk Detector). In Acoustic case Giegels'
>algorithm does not work, i have tried algorithms based on far and
>near end energy estimation but their results varies drastically from
>signal to signal.
> can someone tell me about abt cross correlation methods or any
>other algorithm for DTD.
>
>Thanks in advance.
>
>Regards
>Manish


Sudarini, can you recommend a text or online paper that would serve as a
definition of the problem solved by echo cancellation? Not
necessasarily a comprehensive treatment of solutions but just something
that clarifies the playing field. Thanks,

Bob

Sudarini Pushparajah wrote:
>
> Hi Manish,
> Below are some links to correlation based and other DT
> detection methods. Hope they are useful
>
> Sudarini
> ------------
>
> A New Class of Doubletalk Detectors Based on Cross-Correlation
> www.bell-labs.com/user/jbenesty/papers/sap_mar2000.pdf
>
> An Objective Technique for Evaluating Doubletalk Detectors in Acoustic Echo
> Cancelers.
> www.bell-labs.com/user/jbenesty/papers/sap_nov1999.pdf
>
> On the Problem of Detection and Discrimination of Double Talk and Change in
> the Echo Path.
>
http://citeseer.nj.nec.com/cache/papers2/cs/2091/ftp:zSzzSzftp.control.isy.liu.s\
ezSzpubzSzReportszSz1995zSz1790.pdf/carlemalm96problem.pdf
>
> Acoustic Echo Canceller with two Echo Path Estimation Filters
>
http://www-d.connect.ti.com/dsp/tpcat/tpcodec.nsf/SoftwareForExternal/B82D5EC3BB\
3149028625676100702688
>
> A Good website for acoutic echo cancellation and doubletalk detection
> papaers.
>
http://www.tu-darmstadt.de/fb/et/signale/schmidt/literature/papers/echo_cancella\
tion/general/echo_cancellation_general.html
>
> >From:
> >Reply-To:
> >To:
> >Subject: [echocancel] Double Talk Detector
> >Date: Fri, 02 Nov 2001 04:53:10 -0000
> >
> >
> >Hello friends,
> >
> > I am working on Acoustic echo cancelletion. I am facing problems in
> >selecting DTD(Double Talk Detector). In Acoustic case Giegels'
> >algorithm does not work, i have tried algorithms based on far and
> >near end energy estimation but their results varies drastically from
> >signal to signal.
> > can someone tell me about abt cross correlation methods or any
> >other algorithm for DTD.
> >
> >Thanks in advance.
> >
> >Regards
> >Manish
> >
> >
>
> _____________________________________
> Note: If you do a simple "reply" with your email client, only the author of
this message will receive your answer. You need to do a "reply all" if you want
your answer to be distributed to the entire group.
>
> _____________________________________
> About this discussion group:
>
> To Join:
>
> To Post:
>
> To Leave:
>
> Archives: http://www.yahoogroups.com/group/echocancel
>
> Other DSP-Related Groups: http://www.dsprelated.com > ">http://docs.yahoo.com/info/terms/

--

"Things should be described as simply as possible, but no simpler."

A. Einstein ////////////////////////////////////////\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

To contribute your unused processor cycles to the fight against cancer:

http://www.intel.com/cure

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\///////////////////////////////////////


hi,
there are several methods for DTD like,
1)The Geigel DTD
2)The NCC DTD
3)The FNCC DTD
4)DTD based on Pseudo-Coherence Measure
etc,
Most of the AECs are using FNCC DTD and DTD based on PCM.Try these two.
regards
Atanu
*************************************
Center For Development Of Telematics
Telecom Technology Center Of Govt. Of India
Sneha Complex. Third Floor
71/1 Millers Road. Bangalore - 560052
India.
Ph: +91-80-2282915
+91-80-2263399-245/235/312
Fax: +91-80-2282915

email:

*************************************
----- Original Message -----
From: <>
To: <>
Sent: Friday, November 02, 2001 10:23 AM
Subject: [echocancel] Double Talk Detector >
> Hello friends,
>
> I am working on Acoustic echo cancelletion. I am facing problems in
> selecting DTD(Double Talk Detector). In Acoustic case Giegels'
> algorithm does not work, i have tried algorithms based on far and
> near end energy estimation but their results varies drastically from
> signal to signal.
> can someone tell me about abt cross correlation methods or any
> other algorithm for DTD.
>
> Thanks in advance.
>
> Regards
> Manish >
>
> _____________________________________
> Note: If you do a simple "reply" with your email client, only the author
of this message will receive your answer. You need to do a "reply all" if
you want your answer to be distributed to the entire group.
>
> _____________________________________
> About this discussion group:
>
> To Join:
>
> To Post:
>
> To Leave:
>
> Archives: http://www.yahoogroups.com/group/echocancel
>
> Other DSP-Related Groups: http://www.dsprelated.com > ">http://docs.yahoo.com/info/terms/ >



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 Geigel DTD
> 2)The NCC DTD
> 3)The FNCC DTD
> 4)DTD based on Pseudo-Coherence Measure
> etc,
> Most of the AECs are using FNCC DTD and DTD based on
> PCM.Try these two.
> regards
> Atanu
> *************************************
> Center For Development Of Telematics
> Telecom Technology Center Of Govt. Of India
> Sneha Complex. Third Floor
> 71/1 Millers Road. Bangalore - 560052
> India.
> Ph: +91-80-2282915
> +91-80-2263399-245/235/312
> Fax: +91-80-2282915
>
> email:
>
> *************************************
> ----- Original Message -----
> From: <>
> To: <>
> Sent: Friday, November 02, 2001 10:23 AM
> Subject: [echocancel] Double Talk Detector > >
> > Hello friends,
> >
> > I am working on Acoustic echo cancelletion. I am
> facing problems in
> > selecting DTD(Double Talk Detector). In Acoustic
> case Giegels'
> > algorithm does not work, i have tried algorithms
> based on far and
> > near end energy estimation but their results
> varies drastically from
> > signal to signal.
> > can someone tell me about abt cross correlation
> methods or any
> > other algorithm for DTD.
> >
> > Thanks in advance.
> >
> > Regards
> > Manish
> >
> >
> >
> >
> > _____________________________________
> > Note: If you do a simple "reply" with your email
> client, only the author
> of this message will receive your answer. You need
> to do a "reply all" if
> you want your answer to be distributed to the entire
> group.
> >
> > _____________________________________
> > About this discussion group:
> >
> > To Join:
> >
> > To Post:
> >
> > To Leave:
> >
> > Archives:
> http://www.yahoogroups.com/group/echocancel
> >
> > Other DSP-Related Groups:
> http://www.dsprelated.com
> >
> >
> > ">http://docs.yahoo.com/info/terms/
> >
> >
> >


__________________________________________________


What does the NCC/FNCC stand for? --- In echocancel@y..., "Atanu Guchhait" <atanug@c...> wrote:
> hi,
> there are several methods for DTD like,
> 1)The Geigel DTD
> 2)The NCC DTD
> 3)The FNCC DTD
> 4)DTD based on Pseudo-Coherence Measure
> etc,
> Most of the AECs are using FNCC DTD and DTD based on PCM.Try these
two.
> regards
> Atanu
> *************************************
> Center For Development Of Telematics
> Telecom Technology Center Of Govt. Of India
> Sneha Complex. Third Floor
> 71/1 Millers Road. Bangalore - 560052
> India.
> Ph: +91-80-2282915
> +91-80-2263399-245/235/312
> Fax: +91-80-2282915
>
> email: atanug@c...
> atanu_g@e...
> *************************************
> ----- Original Message -----
> From: <m_sikarwar@y...>
> To: <echocancel@y...>
> Sent: Friday, November 02, 2001 10:23 AM
> Subject: [echocancel] Double Talk Detector > >
> > Hello friends,
> >
> > I am working on Acoustic echo cancelletion. I am facing
problems in
> > selecting DTD(Double Talk Detector). In Acoustic case Giegels'
> > algorithm does not work, i have tried algorithms based on far and
> > near end energy estimation but their results varies drastically
from
> > signal to signal.
> > can someone tell me about abt cross correlation methods or any
> > other algorithm for DTD.
> >
> > Thanks in advance.
> >
> > Regards
> > Manish
> >
> >
> >
> >
> > _____________________________________
> > Note: If you do a simple "reply" with your email client, only the
author
> of this message will receive your answer. You need to do a "reply
all" if
> you want your answer to be distributed to the entire group.
> >
> > _____________________________________
> > About this discussion group:
> >
> > To Join: echocancel-subscribe@y...
> >
> > To Post: echocancel@y...
> >
> > To Leave: echocancel-unsubscribe@y...
> >
> > Archives: http://www.yahoogroups.com/group/echocancel
> >
> > Other DSP-Related Groups: http://www.dsprelated.com
> >
> >
> > ">http://docs.yahoo.com/info/terms/
> >
> >
> >


hi,
NCC/FNCC stands for Normalized Cross-Correlation DTD/ Fast Normalized
Cross-Correlation DTD.
regards
atanu
*************************************
Center For Development Of Telematics
Telecom Technology Center Of Govt. Of India
Sneha Complex. Third Floor
71/1 Millers Road. Bangalore - 560052
India.
Ph: +91-80-2282915
+91-80-2263399-245/235/312
Fax: +91-80-2282915

email:

*************************************
----- Original Message -----
From: <>
To: <>
Sent: Monday, November 19, 2001 12:30 PM
Subject: [echocancel] Re: Double Talk Detector > What does the NCC/FNCC stand for? > --- In echocancel@y..., "Atanu Guchhait" <atanug@c...> wrote:
> > hi,
> > there are several methods for DTD like,
> > 1)The Geigel DTD
> > 2)The NCC DTD
> > 3)The FNCC DTD
> > 4)DTD based on Pseudo-Coherence Measure
> > etc,
> > Most of the AECs are using FNCC DTD and DTD based on PCM.Try these
> two.
> > regards
> > Atanu
> > *************************************
> > Center For Development Of Telematics
> > Telecom Technology Center Of Govt. Of India
> > Sneha Complex. Third Floor
> > 71/1 Millers Road. Bangalore - 560052
> > India.
> > Ph: +91-80-2282915
> > +91-80-2263399-245/235/312
> > Fax: +91-80-2282915
> >
> > email: atanug@c...
> > atanu_g@e...
> > *************************************
> > ----- Original Message -----
> > From: <m_sikarwar@y...>
> > To: <echocancel@y...>
> > Sent: Friday, November 02, 2001 10:23 AM
> > Subject: [echocancel] Double Talk Detector
> >
> >
> > >
> > > Hello friends,
> > >
> > > I am working on Acoustic echo cancelletion. I am facing
> problems in
> > > selecting DTD(Double Talk Detector). In Acoustic case Giegels'
> > > algorithm does not work, i have tried algorithms based on far and
> > > near end energy estimation but their results varies drastically
> from
> > > signal to signal.
> > > can someone tell me about abt cross correlation methods or any
> > > other algorithm for DTD.
> > >
> > > Thanks in advance.
> > >
> > > Regards
> > > Manish
> > >
> > >
> > >
> > >
> > > _____________________________________
> > > Note: If you do a simple "reply" with your email client, only the
> author
> > of this message will receive your answer. You need to do a "reply
> all" if
> > you want your answer to be distributed to the entire group.
> > >
> > > _____________________________________
> > > About this discussion group:
> > >
> > > To Join: echocancel-subscribe@y...
> > >
> > > To Post: echocancel@y...
> > >
> > > To Leave: echocancel-unsubscribe@y...
> > >
> > > Archives: http://www.yahoogroups.com/group/echocancel
> > >
> > > Other DSP-Related Groups: http://www.dsprelated.com
> > >
> > >
> > > ">http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
>
> _____________________________________
> Note: If you do a simple "reply" with your email client, only the author
of this message will receive your answer. You need to do a "reply all" if
you want your answer to be distributed to the entire group.
>
> _____________________________________
> About this discussion group:
>
> To Join:
>
> To Post:
>
> To Leave:
>
> Archives: http://www.yahoogroups.com/group/echocancel
>
> Other DSP-Related Groups: http://www.dsprelated.com > ">http://docs.yahoo.com/info/terms/ >



Hi,
What are the differences for a DTD for AEC and LEC
G.168?
What are the diff. algorithms for filtering for LEC?
What should be done for multichanneling?
thanks.
Narendra

----- Original Message -----
From: HK
To:
Sent: Friday, November 16, 2001 2:06 AM
Subject: Re: [echocancel] Double Talk Detector 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 Geigel DTD
> 2)The NCC DTD
> 3)The FNCC DTD
> 4)DTD based on Pseudo-Coherence Measure
> etc,
> Most of the AECs are using FNCC DTD and DTD based on
> PCM.Try these two.
> regards
> Atanu
> *************************************
> Center For Development Of Telematics
> Telecom Technology Center Of Govt. Of India
> Sneha Complex. Third Floor
> 71/1 Millers Road. Bangalore - 560052
> India.
> Ph: +91-80-2282915
> +91-80-2263399-245/235/312
> Fax: +91-80-2282915
>
> email:
>
> *************************************
> ----- Original Message -----
> From: <>
> To: <>
> Sent: Friday, November 02, 2001 10:23 AM
> Subject: [echocancel] Double Talk Detector > >
> > Hello friends,
> >
> > I am working on Acoustic echo cancelletion. I am
> facing problems in
> > selecting DTD(Double Talk Detector). In Acoustic
> case Giegels'
> > algorithm does not work, i have tried algorithms
> based on far and
> > near end energy estimation but their results
> varies drastically from
> > signal to signal.
> > can someone tell me about abt cross correlation
> methods or any
> > other algorithm for DTD.
> >
> > Thanks in advance.
> >
> > Regards
> > Manish
> >
> >
> >
> >
> > _____________________________________
> > Note: If you do a simple "reply" with your email
> client, only the author
> of this message will receive your answer. You need
> to do a "reply all" if
> you want your answer to be distributed to the entire
> group.
> >
> > _____________________________________
> > About this discussion group:
> >
> > To Join:
> >
> > To Post:
> >
> > To Leave:
> >
> > Archives:
> http://www.yahoogroups.com/group/echocancel
> >
> > Other DSP-Related Groups:
> http://www.dsprelated.com
> >
> >
> > ">http://docs.yahoo.com/info/terms/
> >
> >
> >


__________________________________________________

_____________________________________
Note: If you do a simple "reply" with your email client, only the author of
this message will receive your answer. You need to do a "reply all" if you want
your answer to be distributed to the entire group.

_____________________________________
About this discussion group:

To Join:

To Post:

To Leave:

Archives: http://www.yahoogroups.com/group/echocancel

Other DSP-Related Groups: http://www.dsprelated.com



Anyone know of a good journal paper that describes these DTD
techniques?

Fred

--- In echocancel@y..., "Atanu Guchhait" <atanug@c...> wrote:
> hi,
> NCC/FNCC stands for Normalized Cross-Correlation DTD/ Fast
Normalized
> Cross-Correlation DTD.
> regards
> atanu
> *************************************
> Center For Development Of Telematics
> Telecom Technology Center Of Govt. Of India
> Sneha Complex. Third Floor
> 71/1 Millers Road. Bangalore - 560052
> India.
> Ph: +91-80-2282915
> +91-80-2263399-245/235/312
> Fax: +91-80-2282915
>
> email: atanug@c...
> atanu_g@e...
> *************************************
> ----- Original Message -----
> From: <urinix@l...>
> To: <echocancel@y...>
> Sent: Monday, November 19, 2001 12:30 PM
> Subject: [echocancel] Re: Double Talk Detector > > What does the NCC/FNCC stand for?
> >
> >
> > --- In echocancel@y..., "Atanu Guchhait" <atanug@c...> wrote:
> > > hi,
> > > there are several methods for DTD like,
> > > 1)The Geigel DTD
> > > 2)The NCC DTD
> > > 3)The FNCC DTD
> > > 4)DTD based on Pseudo-Coherence Measure
> > > etc,
> > > Most of the AECs are using FNCC DTD and DTD based on PCM.Try
these
> > two.
> > > regards
> > > Atanu
> > > *************************************
> > > Center For Development Of Telematics
> > > Telecom Technology Center Of Govt. Of India
> > > Sneha Complex. Third Floor
> > > 71/1 Millers Road. Bangalore - 560052
> > > India.
> > > Ph: +91-80-2282915
> > > +91-80-2263399-245/235/312
> > > Fax: +91-80-2282915
> > >
> > > email: atanug@c...
> > > atanu_g@e...
> > > *************************************
> > > ----- Original Message -----
> > > From: <m_sikarwar@y...>
> > > To: <echocancel@y...>
> > > Sent: Friday, November 02, 2001 10:23 AM
> > > Subject: [echocancel] Double Talk Detector
> > >
> > >
> > > >
> > > > Hello friends,
> > > >
> > > > I am working on Acoustic echo cancelletion. I am facing
> > problems in
> > > > selecting DTD(Double Talk Detector). In Acoustic case Giegels'
> > > > algorithm does not work, i have tried algorithms based on far
and
> > > > near end energy estimation but their results varies
drastically
> > from
> > > > signal to signal.
> > > > can someone tell me about abt cross correlation methods or
any
> > > > other algorithm for DTD.
> > > >
> > > > Thanks in advance.
> > > >
> > > > Regards
> > > > Manish
> > > >
> > > >
> > > >
> > > >
> > > > _____________________________________
> > > > Note: If you do a simple "reply" with your email client, only
the
> > author
> > > of this message will receive your answer. You need to do
a "reply
> > all" if
> > > you want your answer to be distributed to the entire group.
> > > >
> > > > _____________________________________
> > > > About this discussion group:
> > > >
> > > > To Join: echocancel-subscribe@y...
> > > >
> > > > To Post: echocancel@y...
> > > >
> > > > To Leave: echocancel-unsubscribe@y...
> > > >
> > > > Archives: http://www.yahoogroups.com/group/echocancel
> > > >
> > > > Other DSP-Related Groups: http://www.dsprelated.com
> > > >
> > > >
> > > > ">http://docs.yahoo.com/info/terms/
> > > >
> > > >
> > > >
> >
> >
> >
> >
> > _____________________________________
> > Note: If you do a simple "reply" with your email client, only the
author
> of this message will receive your answer. You need to do a "reply
all" if
> you want your answer to be distributed to the entire group.
> >
> > _____________________________________
> > About this discussion group:
> >
> > To Join: echocancel-subscribe@y...
> >
> > To Post: echocancel@y...
> >
> > To Leave: echocancel-unsubscribe@y...
> >
> > Archives: http://www.yahoogroups.com/group/echocancel
> >
> > Other DSP-Related Groups: http://www.dsprelated.com
> >
> >
> > ">http://docs.yahoo.com/info/terms/
> >
> >
> >