CODING AND ENCODING DATA

ckemp
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Mind Map on CODING AND ENCODING DATA, created by ckemp on 10/14/2013.

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ckemp
Created by ckemp about 6 years ago
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CODING AND ENCODING DATA
1 ENCODING DATA
1.1 Used by all computers to convert data into machine-readable form
1.2 All computers understand is binary, 1s and 0s, this is difficult for humans to understand
1.3 For people to use computers, data they use must be encoded into binary for a comp. to process and share.
1.4 Way of encoding test is by using ASCII (most widely used coding system) to represent each character as a binary number
1.5 Examples of files stored in binary code
1.5.1 Text e.g. DOC files
1.5.2 Digital pictures e.g. bitmaps, JPG and GIF files
1.5.3 Sound files e.g. WAV or MP3 files
1.6 Program instructions are also stored in binary code.
2 CODING DATA
2.1 Some data is coded before it is stored, this changes the original data into a shortened version by assigning a code
2.2 When data is coded it is done to keep it short - saving storage space.
2.3 Speeds up data entry
2.4 Example coding
2.4.1 M/F for Male or Female
2.4.2 Y/N for Yes or No
2.4.3 DOB e.g. 22 March 1997 are coded as 22 03 1997
2.5 Enter text here

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