Compression
The purpose of compression is to reduce the size of a file. Compression can be applied to all media types.
A compressed file:
- Downloads and streams more quickly
- Takes up less space in memory and backing storage
Key Points
Compression makes files smaller.
Lossy compression loses some data but has a smaller file size.
Lossless compression loses no data but has a larger file size.
Types of Compression
There are two types of compression you must know for National 5.
Lossy Compression
When compressed, some of the original data is lost when the file is compressed.
Files tend to be smaller compared to lossless compression.
Lossless Compression
When compressed, none of the original data is lost.
Files tend to be larger compared to lossy compression.