Why UltraHD is Not 4K - Page 2 - AVS Forum
Forum Jump: 
Reply
 
Thread Tools
post #31 of 40 Old 01-23-2013, 09:34 AM
Senior Member
 
realtight's Avatar
 
Join Date: Apr 2008
Location: Omaha, NE
Posts: 434
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Liked: 33
The reason standard definition content looks so terrible on 1080p displays is because that amount of pixel information was only meant to fill screens the size of 28-30" tops. If you aren't sitting 2 feet from a 40" screen or less you are not going to be able to see the difference between 720p and 1080p. Now the only time you might be able to see pixelation with 1080p content is with those extra large 100"+ projectors and sitting closer then you should... These are the only sized displays where one might be able to tell the difference between 1080p and 4k. The human eye is not powerful enough to distinguish the difference.
realtight is online now  
Sponsored Links
Advertisement
 
post #32 of 40 Old 01-25-2013, 09:47 PM
Member
 
Callsign_Vega's Avatar
 
Join Date: Nov 2008
Posts: 80
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 13
What a silly thread. UHD is 4K. Ultra high definition television (also known as Ultra HD television or UHDTV) includes 4K UHD (2160p) and 8K UHD (4320p), which are two digital video formats proposed by NHK Science & Technology Research Laboratories and defined and approved by the International Telecommunication Union (ITU).

So 8K is a horizontal pixel width of 7680. So 8K isn't 8K either eh? rolleyes.gif People get wrapped up around the silliest things.
Callsign_Vega is offline  
post #33 of 40 Old 01-25-2013, 10:06 PM
AVS Special Member
 
pokekevin's Avatar
 
Join Date: Jun 2011
Location: Huntington Beach, CA
Posts: 5,067
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked: 101
More like they are advertising like its 4k in theaters which its not. 4k in theaters is more than just the resolution. I believe uhd doesn't have the same color gamut (p3? Vs bt2020?)

No subwoofer I've heard has been able to produce the bass I've experienced in the Corps!

Must..stop...buying...every bluray release...
pokekevin is offline  
post #34 of 40 Old 01-26-2013, 07:01 AM
AVS Addicted Member
 
mark haflich's Avatar
 
Join Date: Dec 2000
Location: brookeville, maryland, usa
Posts: 19,881
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 416 Post(s)
Liked: 464
Quote:
Originally Posted by Bardia View Post

Why can't they give me a 100 inch screen of my choice, either 16:9 or 2:35:1 and have it be Kuro PQ??? I BE HAPPY

They can keep their 8K or 24K. Who cares..

simple. One of THEIR objectives is to keep you miserable. smile.gif

Mark Haflich

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

call me at: 240 876 2536
mark haflich is online now  
post #35 of 40 Old 01-26-2013, 07:16 AM
AVS Addicted Member
 
mark haflich's Avatar
 
Join Date: Dec 2000
Location: brookeville, maryland, usa
Posts: 19,881
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 416 Post(s)
Liked: 464
To me, 4K means not only more source and display pixels and a much wider color space and longer bit lengths. Its the promise of DCI quality in the home with perhaps even a wider color space as the 4K standard (and not the EIA standard) sets forthe. The official standard allows 4hd or 4K but sets forth a much wide color space than rec 709 and bit lengths no shorter than 10. Hopely it will be revised to 4:4:4. For a discussion of the STANDARDS, see Joe Kane article in WSR this month.

Mark Haflich

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

call me at: 240 876 2536
mark haflich is online now  
post #36 of 40 Old 07-04-2013, 12:20 PM
AVS Addicted Member
 
John Mason's Avatar
 
Join Date: Jul 2000
Location: New York, NY
Posts: 10,618
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked: 16
Came across an article in June's SMPTE's Motion Imaging Journal that attempts to show how a detail from an overview scene (Fig. 1) would appear at 4k/UHD, 1080p, 720p, and SD (see Fig.2),. The article , by a French UHDTV expert, was published elsewhere in 2012. Noticed another French tech paper with a similar overview/resolutions image sequence sketching 4k delivery to homes. -- John
John Mason is online now  
post #37 of 40 Old 07-05-2013, 04:11 PM
Advanced Member
 
RLBURNSIDE's Avatar
 
Join Date: Jan 2007
Posts: 785
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked: 133
Semantically speaking, 4K is four thousand, not 4096. So all this squabbling over two false interpretations of what 4K means is really silly, IMO. Cropping is probably the best, so that's what they'll use.

ps I bet any money once glass-free 3D arrives and the framerate is good enough, then the 3D re/-evolution will really happen. 2D sucks, it's like black and white. Your vision is 3D already, I don't get what the complaining is all about. So, people might not like the gimickyness of it as it's made right now, but I guess millions of years of evolution has us all spoiled by stereo vision, since most animals and insects have two eyes and see in binocular.

I guess that's too good for our meager entertainment and we should see everything flat and in measly 24 fps for the rest of time.
RLBURNSIDE is offline  
post #38 of 40 Old 07-06-2013, 12:12 PM
Advanced Member
 
Kascnef82's Avatar
 
Join Date: Aug 2012
Posts: 838
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 40
Watching 1080i upcoverted sd content on a 1080p 42 inch tv sucks. Compare that with dvd and even bluray and I notice the difference.
Kascnef82 is offline  
post #39 of 40 Old 07-08-2013, 04:28 AM
Senior Writer @ AVS
 
imagic's Avatar
 
Join Date: Dec 2005
Location: Philadelphia, PA
Posts: 5,679
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 1134 Post(s)
Liked: 2282
Quote:
Originally Posted by RLBURNSIDE View Post

Semantically speaking, 4K is four thousand, not 4096. So all this squabbling over two false interpretations of what 4K means is really silly, IMO. Cropping is probably the best, so that's what they'll use.

ps I bet any money once glass-free 3D arrives and the framerate is good enough, then the 3D re/-evolution will really happen. 2D sucks, it's like black and white. Your vision is 3D already, I don't get what the complaining is all about. So, people might not like the gimickyness of it as it's made right now, but I guess millions of years of evolution has us all spoiled by stereo vision, since most animals and insects have two eyes and see in binocular.

I guess that's too good for our meager entertainment and we should see everything flat and in measly 24 fps for the rest of time.

The effect of stereo vision fades as objects get more distant. Humans stop experiencing stereo vision at a distance of about 18 feet. The spacing of the eyes determines the distance stereo vision is effective to. If you notice a cat bobbing its head just before a jump, it's because domestic feline eyes are too close to each other for a cat to effectively judge distances—so it compensates with the head-bob.

3D movies use "hyper stereo" to depict large scenes in 3D, but without eyes that are feet-apart you'd never see the effect in real life. Also, birds have two eyes but no binocular vision. A number of varieties of whales also lack stereo vision as do most fish. Insect eyes are markedly different in overall function, stereo vision is definitely not the "focus." Also plenty of reptiles also lack stereo vision. While most creatures do have two eyes, 3D vision is not necessarily an evolutionary priority.

Find out more about Mark Henninger at
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
imagic is online now  
post #40 of 40 Old 07-12-2013, 05:13 PM
Member
 
antoniobiz1's Avatar
 
Join Date: Sep 2007
Posts: 135
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Liked: 68
I don't post very often (basically never), but I lurk quite a lot. Every now and then I feel the urge to express my opinion. This is one of such occasions.

From the DCI specs on Wikipedia:

DCI 4k Cinemascope cropped: 4096* 1714; 2,3897:1 aspect ratio; 7,020,544 pixels;
Cropping to fit the UltraHD specs: 3840 * 1607 (2.3897:1 aspect ratio); 6,170,400 pixels;
Absolute difference: 7,020,544 - 6,170,400= 850,144 pixels that are LOST; relative difference: 6,170,400/7,020,544 = 0,8789 which implies that MORE THAN 12% (almost 1/8) of the picture is LOST;

DCI 4k Flat cropped: 3996*2160; 1.85:1 aspect ratio; 8,631,360 pixels;
Cropping to fit the UltraHD specs: 3840*2076; 1,85:1 aspect ratio; 7,970,596 pixels:
Absolute difference: 8,631,360 - 7,970,596 = 660,766 pixels; relative difference: 7,970,596/8,631,360 = 0.9234 which means that ALMOST 8% of the picture is LOST.

So it's not about 200 pixels. It's about having ALL the movies that will ever get on blu-ray, or blu ray 4k, or digital download 4k, missing almost one million pixels and about 1/10 average of the original picture (and I'm not considering tv overscan).

It's not about 200 pixels.
antoniobiz1 is offline  
Reply Latest Industry News

Tags
Ces

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off