1.3 data storage and compression

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Last updated 10:34 AM on 9/18/26
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7 Terms

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Data storage measurements is order

Bit

Nibble

Byte

Kibibyte

Mebibyte

Gibibyte

Tebibyte

Pebibyte

Exbibyte

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how much KiB is one MiB?

1024

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What does data compression do?

Reduces size of the file

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Benefits of compression

Quicker to transmit, upload and download

Not as much bandwidth needed

Fits in limitation of file size on apps

Less storage space needed

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Lossy Compression

Reduces file size by permanently removing data like reducing image resolution or colour depth or sample resolution or sample rate

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Loseless compression

Reduces file size without permanent loss of data like run length encoding

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How does lossless compression work?

Compression algorithm used such as Run length encoding

Repeating patterns are identified and indexed with their number of occurrences and their position