Aspect ratio: `Quicktime HD 720p: 1.78`

Calculation

• Aspect Ratio (short: A/R) is the width of an image or screen, divided by the height. In landscape orientation, the A/R is > 1, for portrait orientation the A/R is < 1 and for square screens, this is = 1.
• Size = `1280` x `720` = `0.92` megapixels
• Aspect ratio = `1.78`
• Angle of diagonal = 0.512 rad = 29.4°
• Length of diagonal = 1468 pixels

Letterboxing

How does a 1.78 image fit on a screen with a different aspect ratio?

Barco Escape Cinema (5.94)

Using 29.8 % of the screen

Pillar box
Cinema 2K scope screen (2.39)

Using 74.4 % of the screen

Pillar box
Cinema 2K flat screen (1.85)

Using 95.7 % of the screen

Pillar box
Cinema 2K full envelope (1.90)

Using 93.7 % of the screen

Pillar box
Extra Wide TV (21:9)

Using 74.7 % of the screen

Pillar box
SXGA/QSXGA screen (5:4)

Using 70 % of the screen

Letter box
HD television (16:9)

Using 100% of the screen

Perfect match
SD television (4:3)

Using 75 % of the screen

Letter box
Square screen (1.00)

Using 56 % of the screen

Letter box
Vertical HD screen (0.56)

Using 31 % of the screen

Letter box