Video Resolutions, sizes and bit-rates

Resolution WidthxHeight Aspect Ratio YUV420 size

SQCIF 128x96 1.33 18432 bytes = 18 Kb

QCIF 176x144 1.22 38016 bytes = 37.125 Kb

CIF 352x288 1.22 152064 bytes = 148.5 Kb

VGA 640x480 1.33 460800 bytes = 450 Kb

(~ 3 times bigger than CIF image)

D1 720x576 622080 = 607.5 Kb

720p 1280x720 = 1350 Kb

(2.22.. times D1 PAL and exactly 3 times of VGA)

Notes:

Aspect ratio 1.33 implies rectangular(wide) screen while smaller aspect ratio i.e. 1.22 implies sqarer screen.

Uncompressed video of TV broadcast quality requires bit rate of 216 Mbps according to ITU-R BT.601-5 recommendation.

VGA 25 fps ~= 11 Mbytes/s

H.264 output 256 Kbps = 32 K Bytes/s

Compression Efficiency is 352 times!!!