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

Matthew Fredrickson creslin at digium.com
Wed Feb 14 11:02:53 MST 2007


On Feb 14, 2007, at 10:17 AM, shadowym wrote:

> I gotta take issue with your comments that a HWEC is just software 
> running
> on a DSP.  In the case of Octasic, it's an ASIC.  How it does EC is 
> VERY
> different because.....it's done completely in hardware, not firmware 
> loaded
> into memory and run on a specialized CPU!  Yes, the ASIC does contain 
> an DSP
> but it is customized for EC.  You cannot think of it as a CPU.

Yes, but the math and functions involved are the same.  It's just doing 
it on one or the other involves different types of "instructions".

Matthew Fredrickson



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