4.What is the difference between Lossy and Lossless data compression?
Lossy data compression only allows an aproximation of the data to be recreated in exchange for better compression rates. Losless data compression is data compression alogorithims that allow the EXACT data to be recreated FROM the compressed data.
5.Which method offers the greatest compression ratio?
The method with the greatest compression ratio is lossy data compression. Video's for example can be compressed at a 100 : 1 ratio. Rate of a losst c ompression is about 5-6 % whilst the rate is ten times more.
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