1. Multimedia File Sizes
Multimedia File size
Low res photo for the web - 1024x720 - jpg 100 Kb
Photo for printing A4 size –jpg – 4000x3000 4MB
Photo for magazine (RAW format) 4000x3000 13MB
Music – wav file – 3 minutes 20MB
Music - mp3 -128kbps – 3 minutes 3MB
Music - mp3 - 256kbps – 3 minutes 6MB
90 minutes of DVD quality video (xvid/divx/mp4 compression) 720x480 700MB
1 DVD film (mpeg compression) 720x480 4.5GB
1 hour of Digital Video (DV compression on tape) 720x480 13GB
1 hour of HiDef video (AVCHD compression on memory card) 1920x1080 6GB
1 hour of HiDef video (HDV compression on tape) 1920x1080 11GB

3. Hard Drive Capacities

4. How optical storage is changing
Pit size Laser Track Data Maximim Year on the Comments
Name
Optical Storage wave distance Transfer Capacity Market
length Rate
CD Compact Disc 0.834 μm 780nm 1.6μm 1200 Kbps 650 MB 1982 Enough space for about 90 minutes of
compressed video
DVD Digital Versatile Disc 0.4 μm 650nm 0.74μm 10.5 Mbps 4.7 GB 1996 Many formats - maximum size is 17 GB -
DVD-18 (Double sided and double layer)
Blu Ray 0.204 μm 405nm 0.4μm 36-54 25 GB 2006 Double sided possible - at the moment this
Mbps becoming quite normal in Europe
CBHD China Blue High 0.204 μm 405nm 0.4μm 36 Mbps 30 GB 2006 Double sided possible - very cheap, used
Definition extensively all over China
HVD Holographic ? ? ? 1000 Mbps 6 TB 2016 Theoretical 1 PB (Peta Byte) Uses the
Versatile Disc (125 MB/s) interference of two green laser beams and a
third red laser beam is used to monitor the
position of the green laser beams. Stores
information in laser interference fringes
(patterns)
5D DVD Five-Dimensional ? ? ? 1500 Mbps 10 TB 2018 5D DVDs use a writing system that uses
Digital Verstaile extremely tiny particles on which data is
Discs written, with multiple layers that are read by
three different colours of laser