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Discussion Groups | Echo Cancellation | Re: Double Talk Detector
Double Talk Detector - Author Unknown - Nov 2 4:53:00 2001
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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 |
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Re: Double Talk Detector - Sudarini Pushparajah - Nov 2 16:23:00 2001
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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 |
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Re: Double Talk Detector - Bob Cain - Nov 2 18:43:00 2001
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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 > > > > > > _____________________________________ -- "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 \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\/////////////////////////////////////// |
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Re: Double Talk Detector - Atanu Guchhait - Nov 15 4:39:00 2001
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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 > > > _____________________________________ |
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Re: Double Talk Detector - HK - Nov 15 20:36:00 2001
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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 > > > > > > > > > > _____________________________________ > > > > > > > > > > > > > __________________________________________________ |
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Re: Double Talk Detector - Author Unknown - Nov 19 7:00:00 2001
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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 > > > > > > > > > > _____________________________________ > > > > > > > > > > > > > |
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Re: Re: Double Talk Detector - Atanu Guchhait - Nov 20 4:09:00 2001
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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 > > > > > > > > > > > > > > > _____________________________________ > > > > > > > > > > > > > > > > > > > > > > > _____________________________________ |
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Re: Double Talk Detector - narendra - Nov 23 15:24:00 2001
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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 > > > > > > > > > > _____________________________________ > > > > > > > > > > > > > __________________________________________________ Yahoo! Groups Sponsor ADVERTISEMENT _____________________________________ Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: Double Talk Detector - Fred - Nov 25 19:13:00 2001
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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 > > > > > > > > > > > > > > > > > > > > _____________________________________ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > _____________________________________ > > > > > > > > > > > > > |
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