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Why do we need to compress files in the first place?
Uncompressed video files are too large and the data rates are too high to transport effectively over a
local area network or the Internet, so you need to compress them.
Video Compression
Below is a table showing data rates and storage requirements for different DV media types:
BITSTREAM TYPE
Uncompressed high definition (1920 x
1080 29.97 fps)
Uncompressed standard definition
(720 x 486 29.97 fps)
DV25 (miniDV, DVCAM, DVCPRO)
Typical DVD
VideoCD
Broadband web video
Modem web video
Compression
DATA RATE
745750
167794
25000
5000
1167
100‐2000
18‐48
TIME ON 1 700MB CD‐ROM
7.5 seconds
33 seconds
3 min, 44 seconds
18 min, 40 seconds
80 minutes
3 hours, 8 minutes at 500
Kbps
48 hours, 37 minutes at
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