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Aspect Ratios

 

Aspect Ratio, Pixels <top>

 

 

Date Notes
2010-01-21 First published version
2020-12-22 Adding basic info on 4K, 5K, 8K

 

Ratio Also Use Examples
1.25:1 5:4
  • Computer screens
  • 8×10 inch prints
  • 1280×1024 (SXGA1)
1.29:1 –
  • US Letter (8.5×11 inch)
1.33:1 4:3
  • SD-TV (PAL, NTSC)
  • Still cameras
  • Digital SLRs fr Olympus, Panasonic
  • Older computer screens
  • 1600×1200 (UXGA)
  • 1280×960 (SXGA1)
  • 1152×864 (XGA+)
  • 1024×768 (XGA)
  • 800×600 (SVGA)
  • 640×480 (VGA)
 PowerShot SD450

PowerShot SD780is
1.4:1 7:5
  • 5×7/7×5 inch prints
 –
1.41:1 –
  • Metric papers (A,B,C series)
    (sq root of 2)
1.5:1 3:2
  • Smart phones
  • Still cameras (36x24mm)
  • Digital SLRs fr Canon, Nikon, Pentax
  • 4×6/6×4 inch prints
  • 35 mm film
  • 960×640 (iPhone 4)
  • 480×320 (iPhone 3x)
  • 540×360 (360p, YouTube)
  • 320×214 (240p, YouTube)
1.55:1 –
  • US Ledger paper (11×17 inch)
1.6:1 16:10

(8:5)
  • Newer (& Wider) computer screens
  • 2560×1600 (WQXGA, 30″)
  • 1920×1200 (WUXGA, 22-26″),
  • 1680×1050 (WSXGA+)
  • 1440×900 (e.g. Mac 15″ laptop)
  • 1280×800 (WXGA1)
1.65:1 ~
  • US Legal paper (8.5×14 inch)
1.67:1 5:3
  • Older computer screens
  • 1280×768 (WXGA1)
1.78:1 16:9
  • HD-TV
  • 2560×1440 (e.g. 27″ iMac)
  • 1920×1080 (1080i/1080p) (e.g. 21.5″ iMac)
  • 1600×900 (HD+)
  • 1366×768 (HD (Basic))
  • 1280×720 (720i/720p)
  • 854×480 (480p, YouTube)
  • 640×360 (360p, YouTube)
 PowerShot SD780is:

W: 4000×2248, 1.78:1
1.85:1
  • Movie theaters
2.39:1
  • Movie theaters
1 Multiple variants exist (e.g. SXGA can be 1280×960 and 1280×1024; and possible more – not researched details)

2 240p, 360p, and 480p denotions as used by (e.g.) YouTube (below) are not official standards as 720p and 1080p are.
(E.g. seen at least two different use of 360p- 540×360 (3:2) and 640×360 (16:9).)

From http://en.wikipedia.org/wiki/File:Vector_Video_Standards2.svg (2010-07-23), via the Display_resolution article

PowerShot SD450 PowerShot SD780is
L (Large) 2592×1944, 1.33:1, 5M 4000×3000, 1.33:1, 12M
M1 (Medium 1) 2048×1536, 1.33:1 3264×2448, 1.33:1
M2 (Medium 2) 1600×1200, 1.33:1 2592×1944, 1.33:1
M3 (Medium 3) n/a 1600×1200, 1.33:1
S (Small) 640×480, 1.33:1 640×480, 1.33:1
Postcard Date
Imprint Mode		 1600×1200, 1.33:1 n/a
W (Widescreen) n/a 4000×2248, 1.78:1

 


YouTube – 240p, …, 1080p <top>

 

YouTube updates video player, adds 720p/480p/360p options
Jan 21, 2010, from http://dvice.com/archives/2010/01/youtube-updates.php

Today YouTube deployed its latest video player, equipped with a new menu that lets users quickly toggle between resolutions. Along the bottom of the window on this video, for instance, there are options for watching the video in 720p, 480p or 360p. This replaces the old buttons labeled “HD” or (confusingly) “HQ.” The toggle for increasing the size of the video window itself is now on a separate button. There are a few other cosmetic changes to the page, all outlined here.

HD aficionados like us love the new menu, but then again we know what those numbers mean. Will the majority of the surfing public like it? Or even care? What say you?

Other sources: YouTube Blog: The Video Page Gets a Makeover

 

Format Standard
or not		 Ex 1
(a HD-video)		 Ex 2
(a ~SD-video)		 Ex 3
(fr Swedish TV)
240p not std 400 x 226, ~16:9

(427 x 240, closer)

 320 x 214, ~3:2)
(360 x 240, =3:2)		 300 x 240, =5:4 Doesn’t seem to be as strict as the other formats but close/around 220-240 px high; width varies.
360p not std 640 x 360, =16:9 540 x 360, =3:2 450 x 360, =5:4 Always seems to be 360 px high; width varies
480p not std 854 x 480, =16:9 720 x 480, =3:2 600 x 480, =5:4 Always seems to be 480 px high; width varies
720p official std 1280 x 720, =16:9 n/a n/a Always 720 px high; 1280 px wide

 
1080p official std 1920 x 1080, =16:9
2,073,600 px		 n/a n/a Always 1080 px high; and 1920 px wide; STD

 
4K no a std refer to resolution
4K UHD
216op		 official std 3840 x 2160, =16:9
8,294,400 px
(4 times v. 1080p)
DCI 4K
(216op)		 official std 4096 × 2160,
256∶135 (16:8.4~)
8,847,360 px
5K (not TV, computer displays) 5120 x 2880, =16:9,
14,745,600 px		 (Like IM2720)
 8K UHD official std 7680 × 4320, =16:9,
33,177,600 px
(4 times v. 2160p,
16 times v. 1080p)

bit rates

1080p 10-30 Mbps

2160p 50-100 Mbps

From tvtechnology.com/news/8k-delivery-challenges-and-industry-readiness: