[arm-allstar] codecs

[David McGough]

Hi Dan,

I added CODEC2 to Asterisk/AllStar several years ago as an experiment.
While IMHO the audio quality was better than that heard on systems using
the IMBE/AMBE CODECs, the quality was still *FAR* below iLBC (and G729,
which is now freely available, since the patent expired a few months ago).

And, I found that once IAX2 protocol overhead got added in, the network
bandwidth savings over using iLBC wasn't as impressive as I had hoped.

So, CODEC2 sat unused; the only obvious choice for using it being to avoid 
transcoding if CODEC2 audio came from another source---like from an HF 
MODEM using the FreeDV software or similar.

Anyhow, this code pre-dated the hamvoip project and was running on a
hybrid x86 ACID box. That code isn't in the current V1.5 release; however
it is still on an that old ACID system. I've never tried it on an ARM
chip.

73, David KB4FXC



On Sat, 6 May 2017, "Dan Keizer via arm-allstar" wrote:

> Curious to know if anyone has some experience with codec2 with allstar
> linking?
> 
> I'd certainly like to minimize the bandwidth - and use ham developed tech
> at the same time.
> 
> Speaking of such - since we want to hook up a number of nodes together, we
> are establishing a local "super node" on a high availability server located
> only a couple of hops from our 2.3GHz network.  Internet bandwidth provided
> by a supporting ham via a 24GHz air fiber.  And rackspace/hosting/internet
> for this node provided by another local ham.
> I'm thinking a stock install of allstarlink would work well for an instance
> such as this.
> Any caveats or experience with such?
> 
> 73, Dan ve4drk
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