[asterisk-users] The High Performance Echo Canceller (HPEC)

[Nic Bellamy]

Larry Shields wrote:
> I recently read about the following new technologies from Digium.  Has 
> anyone tried the new HPEC or knows when it will be available?
It's out now, and I've tried it - the difference between HPEC and MG2 
from trunk is stunning - in situations with bad echo where MG2 can take 
ten or more seconds to converge to a reasonable degree, HPEC does it in 
perhaps 300ms - converging on my intake of breath before I say "hello", 
and absolutely no echo after that unless I purposefully go out of my way 
to screw it up (whistling/blowing into the handpiece for instance - even 
then, the malfunction is minimal).

You can now buy it from the Digium website (US$10 per channel), or if 
you have an in-warranty Digium card, email through the serial numbers to 
Digium support and they'll give you a key (this is what I did).

You'll need Zaptel 1.2.13 to make it go.

It does take quite a bit of CPU though - perhaps 70% more compared to 
MG2-trunk for the same number of taps from my rough measurements.

Cheers,
    Nic.

-- 
Nic Bellamy,
Head Of Engineering, Vadacom Ltd - http://www.vadacom.co.nz/