Compression

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What is data compression?
When file sizes are made smaller while trying to keep it as true to the original as possible.
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Why do compress files?
> Smaller files take up less storage space
> Streaming and downloading files from the Internet is quicker
> Allows web pages to load quicker
> Compressing files means you can email them to people
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What is Lossy compression?
Compression which works by permanently removing data from the file.
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Lossless compression
Compression which makes the file smaller by temporarily removing data to store the file and then restoring it back to its original state when it is opened.
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Pros of Lossy compression
> Greatly reduces file size
> Takes up less bandwidth
> Commonly used
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Pros of Lossless compression
> Data is only removed temporarily so there is no quality reduction
> The files can be decompressed
> Can be used on text and software files
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Cons of Lossy compression
> Loses data
> Can't be used on text or software files
> Worse quality than the original
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Cons of Lossless compression
> Only a slight reduction in file size so it still takes up quite a bit of space.
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Lossy - example of file types
MP3 (audio), AAC (audio), JPEG (image)
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Lossless - examples of file types
FLAC (audio), TIFF (image), PNG (image)
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Other cards in this set

Card 2

Front

Why do compress files?

Back

> Smaller files take up less storage space
> Streaming and downloading files from the Internet is quicker
> Allows web pages to load quicker
> Compressing files means you can email them to people

Card 3

Front

What is Lossy compression?

Back

Preview of the front of card 3

Card 4

Front

Lossless compression

Back

Preview of the front of card 4

Card 5

Front

Pros of Lossy compression

Back

Preview of the front of card 5
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