# Image and video compression QCIF

Hello all,

Q) Calculate the STORAGE REQUIRED (in megabytes) for a 10 minute QCIF
video source assuming 4:2:0 format i.e. assume that the colour components
are sub-sampled by a factor of 2 in each of the X (horizontal) and Y (vertical)
directions.

A) Assuming the following: 176 * 144 resolution, frame rate 8.33 Hz, 8 bits/pixel we would have:

Luminance component : 176 * 144 * 8 * 8.33 = 1.7 MB
Chrominance componet : (176 / 2) * (144 / 2) * 8 * 8.33 = 0.4MB

Therefore total storage of approx 2.1MB required.
###### Who is Participating?

Commented:
8.33Hz means 8.33 frames per second. So for ten minutes, you need one more number in there. Other than that, it looks good.
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Author Commented:
duh!! of course!! sorry :) but apart from that, its ok?
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Commented:
Sorry for the late response; 'twas my anniversary.
Yes. Once you add that in, it will be correct.
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