Compression

What is compression?

Compression is reducing the size of a file so that it can be transmitted or stored in secondary storage.

What are the methods of compression?

Compression can be achieved using two methods: lossy and lossless.

What is lossy compression?

Lossy compression is when data is lost in order to reduce the size on secondary storage, and it is irreversible.

When is lossy compression suitable?

Lossy compression is suitable for data where reducing quality is acceptable, such as images, videos, and sound.

What are examples of file types that use lossy compression?

Examples include JPEG images, MP3 audio, and MPEG-4 video.

What is lossless compression?

Lossless compression is when data is encoded in order to reduce the size on secondary storage, and it is reversible.

When is lossless compression most appropriate?

Lossless compression is more suitable for data where a loss in quality is unacceptable, such as documents.

How does lossless compression work?

Lossless compression uses algorithms to analyze contents, looking for patterns and repetitions, such as replacing repeating characters with a single character followed by the number of occurrences.

What are examples of file types that use lossless compression?

Examples include PNG images, ZIP files, and RAR files.

What is the key advantage of using compression?

Compression maximizes the amount of data you can store on a digital device and minimizes transfer time across a network.

FTP software

( file transfer protocol software) software that copies files to/ from web servers