Re: [Covidimpacts-workshop] Forward Error Correction Qs

I  was also interested in this. Here is another angle. Remote broadcasters (who used to have a truck with a microwave dish to get their signal back to the studio) are now all using production quality codecs over the Internet, including cellular links. They expect flawless audio. As an example of what they use, look at Comrex products. Comrex uses AAC coding, and stresses that it can work over low bandwidth links.

At several thousand dollars a pop, I am not going to play with one of them. Here is one product description with discussion of latency and bandwidth. I think this is state of the art in quality audio. It does have noticeable latency (you can see that when a studio cuts over to a remote.)

Yes, we may be off topic. It is so easy to do...

https://www.bswusa.com/Codecs-Comrex-BRIC-Link-II-P11106.aspx

David Clark
On Nov 12, 2020, 11:38 AM -0500, Livingood, Jason <Jason_Livingood=40comcast.com@dmarc.ietf.org>, wrote:
> In Wednesday’s session I was intrigued by Cullen’s comment about forward error correction (FEC) potentially leading to audio bitrates for conferencing exceeding that of video. I was curious if that potentially pertained to add A/V codecs or just one specific codec? And can this be quantified?
>
> Lastly, if this is indeed as critical an issue as it seemed, how does the feedback loop to the codec developers work so that there could be a software fix leading to a real world improvement?
>
> Thanks!
> Jason
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