Info regarding G.168

Started by Techie Dsp in Echo Cancellation15 years ago 1 reply

Hi, Can I get some links where I can find exhaustive information about G.168.? Thanks in advance. Arun. ...

Hi, Can I get some links where I can find exhaustive information about G.168.? Thanks in advance. Arun. _________________________________________________________________ Looking for a soulmate? http://www.shaadi.


Reference code for G.168

Started by Anonymous in Echo Cancellation15 years ago 1 reply

Message Hi,  

Message Hi,  


Estimate LPC's

Started by rahulparthasarthy in Echo Cancellation15 years ago 4 replies

Hello, I am trying to compute a solution using the least- square- error principle to an overdetermined system of equations. ...

Hello, I am trying to compute a solution using the least- square- error principle to an overdetermined system of equations. The equation is as below: Error = summation (y[n] ? summation (ai x[n-i] ) )... in 'ai' term `i' is subscript where `n'


Filtering Selection Algorithm

Started by Vinu V in Echo Cancellation15 years ago

Hi, I am designing an obstacle detection system using SONAR. I am using a 50Khz signal for transmiting. The application needs...

Hi, I am designing an obstacle detection system using SONAR. I am using a 50Khz signal for transmiting. The application needs to determine the exact frequency of the echo received from the obstacles. The expected range of the echo signals is 45 - 55 Khz and I need an accuracy


On Robustness of LMS and RLS

Started by Huan Tan in Echo Cancellation15 years ago 2 replies

Dear All, I am currently simulating the performances of LMS and RLS adaptive filters. Specifically, I am looking at their...

Dear All, I am currently simulating the performances of LMS and RLS adaptive filters. Specifically, I am looking at their robustness. Theoretically, in H-infinite sense, LMS is a robust filter whereas RLS is not. Through my simulation, I would like to show or prove this theory


LEC from Texas Instruments

Started by realyvirtual in Echo Cancellation15 years ago 1 reply

hi! i am trying to use LEC provided by Texas instruments packaged as an example in development kit for XDAIS complaint...

hi! i am trying to use LEC provided by Texas instruments packaged as an example in development kit for XDAIS complaint algorithms on C6711. but this algorithm appears to be not working properly. it damps the echo part just a little bit. has anyone used it.. can i


AEC Testing speech samples

Started by sunvict in Echo Cancellation15 years ago 2 replies

Hi, I need some speech samples to test my AEC algorithm. Can any one send me some sample files. Which is the best algorithm we can...

Hi, I need some speech samples to test my AEC algorithm. Can any one send me some sample files. Which is the best algorithm we can use for handsfree echo cancellation.I am considering a single channel. sunvict


DC shifting of the filter in NLMS?

Started by Andrew Xiang in Echo Cancellation15 years ago 6 replies

I noticed the DC shifting upward of the filter(impulse response) sometimes? Anyone know what caused that and how to avoid it? ...

I noticed the DC shifting upward of the filter(impulse response) sometimes? Anyone know what caused that and how to avoid it? thanks Andrew


Re: Re: LEC and NEC

Started by Steve Underwood in Echo Cancellation15 years ago

Shaw, David G (David) wrote: >The network generally has ECs for voice. These are >very seldom co-located with the central...

Shaw, David G (David) wrote: >The network generally has ECs for voice. These are >very seldom co-located with the central office equipment. > The network generally does *not* have EC for voice. A phone to phone call across town is not cancelled at all. The only


LEC and NEC

Started by lee in Echo Cancellation15 years ago 6 replies

Can someone tell me what the difference is between a Line Echo Canceller and a Network Echo Canceller? To me, it seems that the only...

Can someone tell me what the difference is between a Line Echo Canceller and a Network Echo Canceller? To me, it seems that the only difference is the echo path delay. Or say, they are just different echo paths. If that's right, then a echo canceller with, say, 128ms delay sho


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