1.3.1 compression Flashcards
1
Q
what is compression
A
reudcing file size
2
Q
why would u use compression
A
to reduce storage space wasted
to improve download speed
3
Q
what is lossless compression
A
temporarily removing data to reduce filesize but it can be recoverd
4
Q
what is lossy compression
A
when you remove data to reduce the filesize
5
Q
what is an example lossless compression
A
run length coding , dictionary coding
6
Q
what is an example of lossy compression
A
reducing the quality on audio or a photo .
7
Q
what is dictionary coding
A
using an index to compress larger words
8
Q
what is run lenght encoding
A
makes use of recurring data and simplifys it
00000 = 5w if 0 = white
