Echo cancellation in communication by a neural network

[steph_smile09]

hello there.. i am doing a research about our thesis entitled echo cancellation in communication by a neural network.. i really need your help.. please help me how to delay a voice signal in matlab.. and also what is the best filter for echo.. and please provide some examples using the LMS and for other filters.. im also making a comparison what is the best filter.. but i dont know how to..please help me...

please share your knowledge about this.. thank you very much

 

[Adil Israr]

Re: echo cancellation

For echo cancellation the best filter is the adaptive filter.

 

[steph_smile09]

Re: echo cancellation

helo thank you for ur reply.. may i ask an example?? of the matlab codes for the adaptive filter?? please.. and please help me how to delay a voice signal.. please...im hoping for ur reply thank you very much..

Added after 51 minutes:

hello everyone.. im stephanie a graduating student..and im doing a
thesis about echo cancellation in communication by a neural network
using the LMS algorithm...i just want to ask help from you guys about
how to delay a voice signal???how to delay this signal..

s=(1+0.2*sin(2*pi*fa*t)).*sin(2*pi*f*(1+0.02*cos(2*pi*fm*t)).*t); and
then may i ask also an example of the matlab program for this
algorithm.. please please...i really need your help...

on how to implement this algorithm in matlab???please please.. im
hoping for your reply..thank you very much..

 

[theghost]

Re: echo cancellation

Hello,

Check this topic

 

[AJAY KUMAR1903]

Re: echo cancellation

The best filter is Adaptive filter with NLMS (normalized least mean square)algorithm and Partitioned Block NLMS(PFBNLMS) algorithm.ok

 

[steinar96]

Re: echo cancellation

If you run your signal trough a a system described by the equation
y[n] = x[n] + x[n-D] where D is the delay. You should get a signal with a superimposed delayed signal on top.