3.1.9+Compression+of+data

=Compression of Data=

Data compression involves encoding information using fewer bits than the original representation

Lossless Compression
Algorithms exploit data redundancy o reduce file size. Common algorithms are Lempel Ziv Welch (LZW), DEFLATE, Lempel Ziv Renau. File asociated with this type of compression are PNG, GIF, ZIP files.

Lossy Compression
In this case some loss of information is acceptable. Typical uses are: == MP3 MP4 JPG

Backups and Archiving
So backup files don't take as much space as the original ones.

File Transfer
If the file is smaller it will take less time to upload/download.

Web use of media Files
Download of MP3 files(smaller music files)

File encryption and protection
Compressed files which their data is mixed up and has no meaning.