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DSP based LEC PDF Print E-mail
Thursday, 10 July 2008 00:00

Hello All,

As you probably know we already have built “Hardware based” echo cancellation module based on Zarlink ASIC and we are very satisfied from its performance. The main characteristic of the “Hardware” echo cancellers is that they just work.  I was not felling very well however due to  the fact the algorithm is deeply buried in the silicon :-) After all I have my background in the DSP field.  You probably will recall that a few months ago I have done a study on the open Line Echo Canceller from MIKET DSP Solutions.  Thank you “MIKET DSP Solutions” for providing this code! The results of the cycle true simulation was very promising and we decided to build our own TMS320VC5510A based echo canceller module.  Well the PCB is designed and we are expecting the first prototypes ready very soon. PCB is shown below.Pin headers of this module is compatible with our ISDN PBXs

Hardware Echo Cancellation Module PDF Print E-mail
Friday, 08 June 2007 00:00

I feel that we are long due to update you on the development status of our e/c module.
The first 20 PCBs arrived from China about a week ago and I decided to solder a few of them myself. This is very relaxing process (well not necessary for your eyes :) ). In about 3.5 hrs, I had 4 fully soldered boards ready for testing.

Open source Line Echo Cenceller (LEC) PDF Print E-mail
Monday, 12 November 2007 00:00

Hello All!


At first, let me introduce myself; my name is Dimitar and I am glad to be a member of Astfin / uCpbx and now Switchfin teams.I am a DSP engineer and my major interest is to twist the FFT in a try to process given signal. For one involved in the field it will not be a surprise that Matlab is my favorite tool.

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