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Hi everybody, I am new at Echo cancellation and have my final year engineering project in the field of acoustic echo cancellation. I wantd to know if there are any general 'echo path' models available that I could use to test my algorithms and review there performance? I have been searching over the internet without any luck so I thouhgt i'd post a message here. Thanks, cheers, Anupam |
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Echo path models
Started by ●November 4, 2001
Reply by ●November 5, 20012001-11-05
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hi anupam!! u know in an echo delay model there is an delay and there is an loss. so give an delay of say 40 samples i.e.5msec and an loss of 6db max. so u can form an equation now. not getting ... here is an samlple.... suppose there is an buffer of 128 samples as an i/p to model. so output of the model will be.. y(i) = 0.5*x(i-40); s0 simple......... i varies from 1 to 128. now guess why 0.5..... its an loss yaar!!!!!!!!!!of 6db max. i guess this will help u......... On Sun, 04 Nov 2001 wrote : > Hi everybody, > I am new at Echo cancellation and have my final year > engineering > project in the field of acoustic echo cancellation. I > wantd to know > if there are any general 'echo path' models available > that I could > use to test my algorithms and review there performance? > I have been > searching over the internet without any luck so I > thouhgt i'd post a > message here. > > Thanks, > cheers, > Anupam > > > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> > Clever Cam is a pen sized digital camera, webcam, and > mini-camcorder. Just $79.95 at Youcansave.com. > http://us.click.yahoo.com/vD9XBB/NkNDAA/ySSFAA/sVPplB/TM > --------------------- > -------------~-> > > _____________________________________ > 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/ |
Reply by ●November 5, 20012001-11-05
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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 you. Maurice Givens wrote: > > Hi everybody, > I am new at Echo cancellation and have my final year engineering > project in the field of acoustic echo cancellation. I wantd to know > if there are any general 'echo path' models available that I could > use to test my algorithms and review there performance? I have been > searching over the internet without any luck so I thouhgt i'd post a > message here. > > Thanks, > cheers, > Anupam > _____________________________________ > 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/ |
