[opendtv] Re: 4k @ 60 fps encoded into 15 Mbps using HEVC
- From: Olivier Houot <olho_avatar_i@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sat, 20 Oct 2012 13:53:14 +0200
I think anyone serious about HD should consider video projection, so we would
be talking about screens in the 100"-175" range, diagonal.
Optimal viewing of 4K would be when the picture covers 60 degrees of the FOV.
That would mean a ratio of distance/diagonal of 0.755
So for a 115" diagonal picture (which is what i use), you should consider a
viewing distance of about 6.5 feet.
4K would make it even easier to fit a large picture in a living room, as you
can get closer to the screen for a given image size.
When i stay at this distance, i can still see both sides of the screen, but i
feel i use more peripheral vision. It would certainly make things more
immersive,
but i am not sure how comfortable it would be to watch a film that way.
Right now, i sit at the maximum possible distance given the room configuration
(about 4.5 m), which makes me close to the 30 ° needed for 2K.
It would still feel comfortable with a picture taking up the full width of the
wall, about 172" diagonal. This would take 45° of my FOV, and would require
only 2.7K
But the industry will not standardize on 3K, so i would have to take 4K and
accept to waste some resolution, or get closer.
Or perhaps the extra information could be used in another way like better frame
compatible 3D 2K, or additional 2K viewing angles...
UHDTV or above would be best viewed with stereoscopic virtual reality goggles,
in an attempt to produce truly immersive TV. With such devices, the size of the
room
does not matter any more.
Anyway i would still give priority to HFR.
Mike Tsinberg wrote:
> Can you see a difference between 2K @ 60 and 4K @ 60 on 70" display 9
> feet away?
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