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This is the Blog I will be using for my 2011 IST (internet & software technology) class



Monday, June 20, 2011

DATA COMPRESSION [23/05/11]

What is data compression?
the process of encoding information, using fewer bits than the original representation would use 
What is a data compression ratio?
-
Why is data compression an important technique for the online world?


What is the difference between Lossy and Lossless data compression?Lossy is an image compression used in Digital Camera's & DVD's, while Lossless is the compression method used for lossless storage
Which method offers the greatest compression ratio?
Lossy over Lossless can give you a smaller compressed file which is more useful and still fufils the requirments of the apllication

Why is human psychology and perception an important factor in methods of Lossy compression?

Name Lossy file formats for audio, still image and video format.

Lossy CPC, ICER

Motion JPEG
MPEG-1... ect

MP2
MP3

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