Media Examples
Digital Photographs
Changing the number of dots per
inch (DPI) on a digital photograph can have a dramatic effect
on the download time for the student. Below are some examples
of the sizes correlating to a specific DPI, when using a standard
3.5"x5" photograph.
Portrait
Photograph
 |
DPI (Dots per
inch) |
Photo Size in
Kilobytes |
Download Time (56K Modem) |
|
16KB |
3 seconds |
|
40KB |
7 seconds |
|
77KB |
13 seconds |
|
124KB |
22 seconds |
|
182KB |
42 Seconds |
Action
Photograph
 |
DPI (Dots per
inch) |
Photo Size in
Kilobytes |
Download Time (56K Modem) |
|
19KB |
3 seconds |
|
41KB |
7 seconds |
|
68KB |
12 seconds |
|
98KB |
17 seconds |
|
141KB |
25 seconds |
Digital Video
Digital video needs a fast Internet connection
to be played back optimally. Changing the type and quality of
the video can make the video more accessible to more students.
Keep in mind that your students will need to install a player
for these video types before they can be viewed. Below are some
examples.
Apple
Quicktime |
Low Motion
 |
High Motion
 |
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Real Player |
Low Motion
|
High Motion
|
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Windows
Media Video |
Low Motion
|
High Motion
|
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CTELT Recommendations
We are currently recommending the use
of 100 dpi images for web use, and 56K streaming video bandwidths.
It is up to you to determine which type of video technology
you use for your classes.
For Quicktime video, we recommend installing the latest version.
Other items to consider
Almost all users of the Microsoft Windows
operating system will already have the Windows Media Player
on their computer. All macintosh users will have a copy of
Quicktime installed.
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