CTS Video Flashcards
4:3 or Standard def
1.33
16:9 or HD video
1.77
16:10 or Computer/video
1.6
1.33
Standard def or 4:3
1.77
HD Video or 16:9
1.6
Computer/video or 16:10
What’s the Pythagorean Theorem?
A squared + B squared = C squared
What’s the formula for aspect ratio?
AR = W/H
Numbers for HD aspect ratio WITH diagonal
16:9:18.36
In SH = D / SL what do the variables mean?
SH is image height, D is distance of farthest viewer, SL is Level of screen detail.
What’s the formula for determining image height?
SH = D / SL
What are the numbers for Level of screen detail?
8 for general viewing, 6 for reading, 4 for inspection detail
Formula for Viewer Distance by Text Height?
D = TH * 150
What’s the average seated head height?
52” or 1.3 m
What the average seated eye height?
48” or 1.2 m
When talking about projector placement what do x, y, and z reference?
x = horizontal, y = vertical, z = throw
What’s the formula for Throw Distance?
Screen width * throw ratio
What are some film aspect ratios and their names?
Panavision (1.85:1), 70mm (2.05:1), CenemaScope (2.35:1), Cinerama (2.76:1)
What are the two agreed upon resolutions of HD video?
1280 x 720 ; 1920 x 1080
What’s the resolution of 2K video?
2048 x 1024
What’s the resolution of 4K video?
4096 x 2048
Which two DCI set HD resolutions cannot yet be broadcast in the US?
2K (2048 x 1024) and 4K (4096 x 2048)
In the US we always broadcast TV signals at _____, no matter the resolution or original frame rate.
59.94 Hz
