Compression

• What is data compression?

  When files are made smaller
• Give uses of compressing files

  Take up less storage

  Speeds up streaming and downloading from the internet as less bandwidth used

  Emails
• What are the two types of compression?

  Lossy

  Lossless
• How does lossy compression work?

  Permanently removing data from the file
• How does lossless compression work?

  Makes file smaller by temporarily removing data to store the file and restores it when it's opened.
• Give pros of lossy compression.

  Greatly reduced file size

  Lossy files take up less bandwidth

  Commonly used so lots of software can read lossy files
• Give pros of lossless compression.

  Data is only removed temporarily so no reduction in quality

  Lossless files can be reverted back to OG

  Lossless can be used on text and software files
• Give cons of lossy compression.

  Loss of data

  Can't be used on text or software files

  Worse quality
• Give con of lossless compression.

  Only a slight reduction in file size so will take up more space
• Give file types for lossy

  MP3

  AAC

  JPEG
• Give file types for lossless

  FLAC

  TIFF

  PNG