Information loss in compression Skills: none IT concepts: lossy and lossless compression This work is licensed under a Creative Commons Attribution-Noncommercial-

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Presentation transcript:

Information loss in compression Skills: none IT concepts: lossy and lossless compression This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License.

Where does this topic fit? Internet concepts –Applications –Technology –Implications Internet skills –Application development –Content creation

Original, 139 KB Compressed to 4.6 KB Was information lost?

If I send you this in an ? Can you reconstruct this?

Information is lost This is an example of lossy compression

Is lossy compression OK for spreadsheet files?

Compress Restore Transfer Lossless compression

All data types can be compressed Why not always use lossless compression?

A few questions Is lossy compression OK for text data? Is lossy compression OK for audio data? Is lossy compression OK for video data?

Information loss in compression Skills: none IT concepts: lossy and lossless compression This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License.