On Mon, Jan 14, 2019 at 3:49 AM Steve Timko <steveti...@gmail.com> wrote:

> Close but not the same.
>
>
> https://www.extremetech.com/extreme/174221-no-tv-makers-4k-and-uhd-are-not-the-same-thing
>
>
UHD is very slightly below 4K. But from a consumer perspective, there's no
real reason to get rid of a "UHD" TV because a 4K TV is available. Nobody
is going to notice a practical difference between the two. Things like an
OLED screen or HDR might make a difference, however.

On Mon, Jan 14, 2019 at 4:44 AM Doug Eastick <east...@mcd.on.ca> wrote:

> Agreed on the compression.
> I happened to be quite close to my tv during a football game this
> afternoon (I think 1080) and wow those Eagles got blurry in motion.
>
>
 I must confess that I like a bit of motion blur in sports coverage - or
indeed anything. Motion smoothing settings on TV sets is the work of the
devil.

But yes, it's all about compression really. 4K is all very well, but if the
compression is low for bandwidth reasons or whatever, then the picture is
inferior. It's why a Blu Ray will just about always look better than the
same material on Netflix (unless they've tried to squeeze too many episodes
onto one disc or whatever).

It's also worth saying that it's technically very challenging doing high
resolution broadcasting live. With pre-recorded material, computers can
compress the picture in such a way as to retain quality. But that takes
time. In a live environment, it's much harder. There's a great technical
blog that the BBC's R&D published about its broadcasting of the World Cup
last summer in 4K:
https://www.bbc.co.uk/rd/blog/2018-07-ultra-high-definition-uhd-viewing


Adam

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