Data Compression

Makes the file smaller by deleting parts of the file permanently (forever)

• Lossy Compression
• Lossless Compression

Makes the file smaller by giving repeated patterns/colours a specific code

• Lossy Compression
• Lossless Compression

A set of instructions for the computer to follow

• Algorithm
• Iteration

Which of these is an advantage for Lossy compression?

• The file size becomes significantly (much) smaller
• The file size does not become much smaller than 50%

Which of these is an advantage for Lossless compression?

• The file size becomes significantly (much) smaller
• The file size does not become much smaller than 50%

What would you use compression for?

• Making an image file smaller
• Modifying an image 

Which of the following would not be suitable for Lossy Compression?

• Images

• Sounds

• Videos

• Text

Compression in general makes it _______ to send, upload and stream data

• Quicker

• Slower

Lossless compression permanently deletes the data

• True

• False

Lossy compression would be suitable for text files

• True

• False