Re: [Starlink] It’s the Latency, FCC

David Fernández
2024-05-06T13:22:00Z

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For " I dont know what MPEG codec is it, at what mbit/s speed" you may
check this:
https://lists.bufferbloat.net/pipermail/starlink/2024-April/002706.html

From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
To: Frantisek Borsik <frantisek.borsik@gmail.com>, Colin_Higbie
<CHigbie1@higbie.name>
Cc: "starlink@lists.bufferbloat.net" <starlink@lists.bufferbloat.net>
Subject: Re: [Starlink] It’s the Latency, FCC
Message-ID: <298126c9-7854-47c5-a965-c0f89a855939@gmail.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Le 02/05/2024 à 21:50, Frantisek Borsik a écrit :
> Thanks, Colin. This was just another great read on video (and audio -
> in the past emails from you) bullet-proofing for the near future.
>
> To be honest, the consensus on the bandwidth overall in the
> bufferbloat related circles was in the 25/3 - 100/20 ballpark

To continue on this discussion of 25mbit/s (mbyte/s ?) of 4k, and 8k,
here are some more thoughts:

- about 25mbit/s bw needs for 4K: hdmi cables for 4K HDR10 (high
dynamic range) are specified at 18gbit/s and not 25mbit/s (mbyte?).
These HDMI cables dont run IP. But, supposedly, the displayed 4K image
is of a higher quality if played over hdmi (presumably from a player)
than from a server remote on the Internet. To achieve parity, maybe
one wants to run that hdmi flow from the server with IP, and at that
point the bandwidth requirement is higher than 25mbit/s. This goes hand
in hand with the disc evolutions (triple-layer bluray discs of 120Gbyte
capacity is the most recent; I dont see signs of that to slow).

- in some regions, the terrestrial DVB (TV on radio frequencies, with
antenna receivers, not IP) run at 4K HDR10 starting this year. I dont
know what MPEG codec is it, at what mbit/s speed. But it is not over the
Internet. This means that probably ISPs are inclined to do more than
that 4K over the Internet, maybe 8K, to distinguish their service from
DVB. The audience of these DVB streams is very wide, with cheap
one-time buy receivers (no subscription, like with ISP) already widely
available in electronics stores.

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