HD, FHD & UHD. What's the difference?

Rukbat

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HD is 1080i. FHD is 1080p. UHD is 4k (UHD is the consumer standard, 4k is the commercial standard - it's basically the same thing, they're just different ways of defining it).

You're not going to notice the difference between them unless the display iis larger than about 60 inches - certainly not on any phone or tablet. But the higher the definition, the larger the file will be, and the longer it will take the phone to process the picture unless you're shooting in raw format (which is fast and can be converted to anything else later).

What's the best setting to use? If you're going to be showing or looking at the pictures on a 24" or smaller screen, HD is more than enough. If you have an 80" 4k TV and want to show the pictures on that, use UHD.
 

RedOctobyr

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Not according to my understanding, at least.

1080i is 1920x1080 resolution, interlaced. So one frame draws the even lines (540 of them), the next frame draws the odd lines. This is typically done 60 times a second, for 30 complete frames per second.

720p is 1280x720, non-interlaced. Every line (720 of them) is drawn with every frame. Typically 60 times a second, for 60 complete frames per second.
 

Inspgadget113

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So t doesn't really matter if I use HD or FHD? I'll get the same picture when playing back on my phone, tablet or TV?

Posted via the Android Central App
 

GibMcFragger

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Re: HD, FHD & UHD. What's the difference?

HD is 720p (720 lines of resolution), FHD is 1080p (1080 lines of resolution).

On your phone or tablet you may not notice the difference in resolution, but on a large TV you will.
 

UHD1

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normally id not correct your post but as its in the first 'FHD' google search i need t o correct you

UHD is NOT the same as 4K in fact to be correct there is no UHD there IS 'UHD1' 2160p and 'UHD2' 4320p as per the original NHK R&D/BBC R&D from years ago now, they both have to comply with the official DVB spec although they added a ‘UHD-1 Phase 2’ instead of doing it right first time ;o)

basicly ‘UHD-1 Phase 2’ and UHD2 must comply with Rec. 2020 (they may yet add another Phase doh!) and High Dynamic Range (HDR) so it helps stop colour and shade banding

https://en.wikipedia.org/wiki/Rec._2020
DVB embraces HDR with next-phase Ultra HD TV requirements
November 19, 2015

also as a correction, HDTV 720P and 1080i is referred to as 'HD Ready' while 1080P is called 'Full HD'

lets get goole to provide the right information, given that UHD1 is here in japan and UHD2 will be here in 2017 instead of just before 2020 (hence why they called the Rec._2020 spec ;o) ) as per the original olympics UHD2 schedule...
 

FreddyHeadey

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! The more I learn - the more I get confused !
I'm very new here and a slow learner.

Now I need to know
what 'i' is? and
what 'p' is?
and the significance?

I was looking for a link to some sort of chart which would tell me how big video files would be in the formats offered by my new Nokia phone.
The options are
UHD 4K
FHD 1080p
HD 720p
(18:9) FHD
(18:9) HD

I presume 18:9 is a ratio, so what are the ratios of the three options above it?

Thanks
 

Mooncatt

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Feb 23, 2011
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The "i" means interlaced scanned images. The screen renders every odd row of pixels, then repeats doing every even row. This is pretty much outdated now, and would cause flicker in slow moving/static scenes. It was how HD was rendered before the processing caught up to the resolution.

"p" means interlaced scans. Every row of pixels is rendered in order top to bottom. You get much better image quality this way and most everything can handle it now.

The standard ratio in all consumer HD formats is 18:9. That's why you don't see it mentioned much anymore and only see resolution labels like 1080p or 4K (4k being progressive scan by default, hence no 4Ki or 4Kp labels).
 

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