View Profile
View Forum Posts
Private Message
How to determined if the number is belongs to 16:9 or not?
Some said 854*480 but in here, http://pacoup.com/2011/06/12/list-of-true-169-resolutions/ the number is NOT included.
Please give me a clue ... thank you.
+ Reply to Thread
Results 1 to 10 of 10
-
-
It is 16:9 NTSC DVD.
854 x 480 = 1.779
16:9 = 1.778
848 x 480 = 1.766
His list is wrong.Read my blog here.
-
No, his list is right. The highlighted lines are exact 16:9 ratios. All the others, including 854x480, are approximations.
-
So ... how can we know which one is?Originally Posted by jagabo
Is the statement which said ... as long as the Width divided by Height is 1.78 it will always be 16:9 ... is right?
Please confirm ... -
Please help ...Originally Posted by czgirb
So ... how can we know which one is?Originally Posted by jagabo
Is the statement which said ... as long as the Width divided by Height is 1.78 it will always be 16:9 ... is right?
Please confirm ...
Thank you. -
Why is it so important that you know ?
If you are encoding for DVD then anything wider than 1.33 (4:3) is a candidate, and anything wider than 1.66 should be encoded for 16:9. Most film material isn't 16:9. It is either 1.33, 1.66, or something wider than 16:9 - 1.85 or wider.Read my blog here.
-
You have a perfect 16:9 ratio when:
width / height = 1.777777777777777777777777777777777....
The sevens continue out into infinity.
But only when using square pixels. For example, with DVD 720x480 or 720x576 can be 16:9 because the pixels aren't square. There is a flag on the DVD (in the IFO files or in the VOB files) that tell the proper aspect ratio at which the video is to be displayed, 4:3 or 16:9.
Frame sizes like 704x400 (1;76) are close enough to 16:9 that you can't tell the difference without measuring the onscreen image. And if you have a CRT the aspect ratio of the TV is probably off by a few percent. So it's not worth worrying about.Last edited by jagabo; 19th Jul 2011 at 07:04.
-
A simpler way of looking at is to say 9 x width = 16 x height.Originally Posted by jagabo
-
What the heck is "Super Hi-Vision"? Never heard of it.
-
Japanese 7680x4320 format:Originally Posted by Nelson37
http://www.nhk.or.jp/digital/en/super_hi/02_super.html
Quote
