Re: [Mops] Reminder: Video Ingest over QUIC Side Meeting Friday 7/30 18:00 UTC

[Ian Swett <[e-mail]>]

On Fri, Jul 30, 2021 at 5:27 AM Ali C. Begen <ali.begen=
[e-mail]> wrote:

>
>
> > On Jul 30, 2021, at 5:42 AM, Ian Swett <ianswett=
> [e-mail]> wrote:
> >
> > To frame this in statistical terms, the sum of multiple normal
> distributions is a normal distribution with the sum of the means and a sum
> of the variances(
> https://en.wikipedia.org/wiki/Sum_of_normally_distributed_random_variables).
> Since the standard deviation is the square root of the variance, the
> standard deviation is dominated by the largest source of variation, and if
> each link introduces some variance, it's really only the one that
> introduces the most variation that matters.
>
> Sure, but that assumes independent distributions which does not much apply
> in this case. But the point is still valid, there will likely be 1-2
> problematic hops in the entire ~10-20 e2e path.
>

Yes, assuming a normal distribution is almost certainly wrong, so I should
have apologized up front for that.  As long as the conclusion is valid for
any plausible set of distributions, we should be good.

>
> >  Given no link knows whether it's the dominant source of variation on
> the path, I'd suggest every link pass along packets as soon as possible.
>
> Yes.
>
> > Obviously, link-layer error correction and other approaches which
> increase reliability without introducing delay are still welcome and
> valuable.
>
> +1, though improved reliability almost always comes at the cost of
> increased delay (rtx, fec, etc.).