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Discussion Groups | Echo Cancellation | Difference between ERL and ERLE

Technical discussions about echo cancellation and adaptive filtering in general.

  

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Difference between ERL and ERLE - ganesa1234 - Nov 18 8:18:00 2004





Dear Friends

Just to ask you'll on what is the difference between ERL and ERLE ?
I have done plot's where the range of the ERLE is always in the
positive, but then, some other researches do not have ERLE, but
they have ERL, and their plot is in the negative region.

Hope you guys can help me out. Many Many Thanks

Regards

Ganesan.P






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Re: Difference between ERL and ERLE - Deepak - Nov 18 13:09:00 2004


could not figure out much. Attached documents might
help.

__________________________________



Attachment (not stored)
2003MAR10_AMD_AN05.pdf
Type: application/pdf

Attachment (not stored)
2001APR27_DSP_CT_AN.pdf
Type: application/pdf



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Re: Difference between ERL and ERLE - Steve Underwood - Nov 18 14:41:00 2004


Hi,

ERL == echo return loss == ratio of sent energy to echo energy (or the
other way around, according to state)
ERLE == echo return loss enhancement == the increase in the ERL when you
switch the echo canceller on.

You might have a 15dB loss, and when you turn on the canceller and it
becomes 45dB. So, your ERL is 15dB without the canceller, and 45dB with
the canceller. The canceller gives you an ERLE of 30dB.

The "taste" part just means you might see a minus sign or you might not.
If its a loss, I think it should be positive. Some people make it negative.

Regards,
Steve

ganesa1234 wrote: >Dear Friends
>
> Just to ask you'll on what is the difference between ERL and ERLE ?
>I have done plot's where the range of the ERLE is always in the
>positive, but then, some other researches do not have ERLE, but
>they have ERL, and their plot is in the negative region.
>
> Hope you guys can help me out. Many Many Thanks
>
>Regards
>
>Ganesan.P >
>_____________________________________ >Yahoo! Groups Links



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