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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 on theme: "Information loss in compression Skills: none IT concepts: lossy and lossless compression This work is licensed under a Creative Commons Attribution-Noncommercial-"— Presentation transcript:

1 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.

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

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

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

5 Information is lost This is an example of lossy compression

6 Is lossy compression OK for spreadsheet files?

7 Compress Restore Transfer Lossless compression

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

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

10 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.

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