Hi David,
> On 18. Mar 2024, at 20:32, David Lang via Starlink
> <starlink@lists.bufferbloat.net> wrote:
>
> On Mon, 18 Mar 2024, Colin_Higbie via Starlink wrote:
>
>> Will that 25Mbps requirement change in the future? Probably. It will
>> probably go up even though 4K HDR streaming will probably be achievable with
>> less bandwidth in the future due to further improvements in compression
>> algorithms. This is because, yeah, eventually maybe 8K or higher resolutions
>> will be a standard, or maybe there will be a higher bit depth HDR (that
>> seems slightly more likely to me). It's not at all clear though that's the
>> case. At some point, you reach a state where there is no benefit to higher
>> resolutions. Phones hit that point a few years ago and have stopped moving
>> to higher resolution displays. There is currently 0% of content from any
>> major provider that's in 8K (just some experimental YouTube videos), and a
>> person viewing 8K would be unlikely to report any visual advantage over 4K
>> (SD -> HD is huge, HD -> 4K is noticeable, 4K -> 8K is imperceptible for
>> camera-recording scenes on any standard size viewing experience).
>
> I'll point out that professional still cameras (DSLRs and the new mirrorless
> ones) also seem to have stalled with the top-of-the-line Canon and Nikon
> topping out at around 20-24 mp (after selling some models that went to 30p or
> so), Sony has some models at 45 mp.
One of the issues is cost, Zour sensor pixels need to be large enough
to capture a sufficient amount of photons in a short enough amount of time to
be useful, and that puts a (soft) lower limit on how small you can make your
pixels... Once your divided up your sensor are into the smalles reasonable
pixel size all you can do iso is increase sensor size and hence cost...
especially if I am correct in assuming that at one point you also need to
increase the diameter of your optics to "feed" the sensor properly. At which
point it is not only cost but also size...
Regards
Sebastian
>
> 8k video is in the ballpark of 30mp
>
> David Lang
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