1.2.5 compression Flashcards
1
Q
what is compression
A
making file smaller while keeping it as similar as possible to the original file
2
Q
why are files compressed
A
- smaller files take up less storage
- streaming + downloading is quicker
- allows web pages to load quicker
3
Q
what is lossy
A
permanently removing data that wont affect too much
4
Q
what is lossless
A
repeating patterns of data are substituted temporarily
5
Q
advantages of lossy
A
- greatly reduces file size
- takes up less bandwidth
6
Q
disadvantages of lossy
A
- cant be reversed
- cant be used on text + software files
- worse quality than original
7
Q
advantages of lossless
A
- reversible
- can be used on software + text files
- doesn’t affect quality
8
Q
disadvantages of lossless
A
- only slight reduction in file size
