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Graham_of_Rainham
11th January 2016, 03:48 PM
My son has bought himself a 48" 4K TV and wanted to see how good a 4K picture is.

I produced two similar images for him, from the same ORF file.

1: 3840 x 2160

2: 1920 x 1080

Studying them very closely, at a couple of feet from the screen, the difference in small detail, can be seen. However, back at normal viewing distance, the images look virtually the same.

Has anyone else tried this *???

OM USer
11th January 2016, 04:23 PM
My 10" tablet is 2560x1600 and I can't tell the difference between that and my 22" 1920x1080 monitor. OK, the former looks crisper but in terms of detail at normal viewing distance I can't see detail in one that is not in the other.

As for actually watching TV, even HD broadcasts show some pixelation. I guess you need a 4K Blu Ray to get the benefit.

Walti
11th January 2016, 04:52 PM
As for actually watching TV, even HD broadcasts show some pixelation.

I may be wrong on this one, but I think thats either the bandwidth of the signal or the compression used in the signal rather than the resolution of the display...

Daveart
11th January 2016, 05:50 PM
Hi to be honest the only noticeable difference is when viewed on a small cinema theatre screen which are about 18ft across, then hd starts to show some pixilations 4 k is really designed for large cinema screens, which is what the latest digital films are produced at.

Dave

birdboy
11th January 2016, 06:31 PM
Interesting. What is your son's TV screen resolution in pixels?

Jim Ford
11th January 2016, 07:07 PM
Our TV is HD, but to be honest I can't see any obvious difference between 720 and 1080 downloads.

Jim

timboo
11th January 2016, 07:09 PM
you need a 4K Blu Ray to get the benefit.

Blue ray might not be the new medium for 4K in the future, they may have to utilise a new technology. I certainly notice the difference on 4K monitor over 1080p.

Graham_of_Rainham
11th January 2016, 07:14 PM
Interesting. What is your son's TV screen resolution in pixels?

8.3 Mp (3840 x 2160)

My main interest will be in grabbing still frames from 4K Video.

birdboy
11th January 2016, 07:28 PM
8.3 Mp (3840 x 2160)

My main interest will be in grabbing still frames from 4K Video.

so it that only 8bit colour per pixel?

timboo
11th January 2016, 07:32 PM
Don't forget 8K


http://www.gizmag.com/japan-display-17-inch-8k-monitor/39690/

OM USer
11th January 2016, 10:24 PM
I may be wrong on this one, but I think thats either the bandwidth of the signal or the compression used in the signal rather than the resolution of the display...

Sorry, yes, this was my point. They are not even broadcasting a full HD signal when they should be and if this shows up on a full HD screen then what hope is there for eventual broadcasting of a 4K signal.

Kiwi Paul
11th January 2016, 10:51 PM
I have a 5K (5120 x 2880) 27" monitor and a 24" (1920 x 1200) monitor, the 27" is my main and 24" sits beside it, if I open a photo in LR and view full screen on both monitors the 5K image has more detail and just looks a bit better than the image on the 24" monitor, although the difference isn't huge but noticeable.
However things like text etc look sharper and have a real clarity on the 5K, far more so than the 24"

Paul