2.3.2: understand the need for data compression and methods of compressing data (lossless, lossy)
Keyword | Definition |
---|---|
data compression | algorithm that reduces the number of bits needed to store data |
jpg | lossy compression algorithm used for images |
lossless compression | compression algorithm which can be reversed without any loss of quality or data |
lossy compression | compression algorithm which cannot be reversed without losing some of the original quality or data |
mp3 | lossy compression algorithm used for sound |
run length encoding | a form of lossless compression that represents each value and the number of times it repeats in order to attempt to reduce the size of a representation of data |
zip | lossless compression algorithm used for any type of data |