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

[shadowym]

Interesting,

Is this just a more advanced software echo canceller or software with
hardware hooks or software with hardware assisted processing?

How would it compare to a true hardware echo canceller like the one Sangoma
uses.  Besides the extra CPU cycles required.  

-----Original Message-----
From: Nic Bellamy [mailto:nicb-lists at vadacom.co.nz] 
Sent: Tuesday, February 13, 2007 12:41 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] The High Performance Echo Canceller (HPEC)

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/