19 - Data Structure and Storage Skill Builders
:::
An IS department in a major public university records the lectures for 10 of its classes for video streaming to its partner universities in India and China. Each twice-weekly lecture runs for 1.25 hours and a semester is 15 weeks long. A video streaming expert estimates that one minute of digital video requires 6.5 Mbytes using MPEG-4 and Apple's QuickTime software. What is MPEG-4? Calculate how much storage space will be required and recommend a storage device for the department.
MPEG-4 definition
| Semester | 15 weeks |
| Classes | 10 per week |
| Lecture length | 1.25 hours per class |
| Lectures | 2 per class per week |
| Video storage | 6.5 Mbytes per minute |
| Lecture hours | 15*10*1.25*2 |
| Lecture minutes | 15*10*1.25*2*60 |
| Mbytes | 15*10*1.25*2*60*6.5 |
| Gbytes | 15*10*1.25*2*60*6.5/1000 |
| Gbytes | 146.25 |
RAID-1 because of the likely high number of reads compared to writes once the data are loaded.