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CODING AND ENCODING DATA
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Mind Map on CODING AND ENCODING DATA, created by ckemp on 14/10/2013.
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ckemp
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ckemp
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CODING AND ENCODING DATA
ENCODING DATA
Used by all computers to convert data into machine-readable form
All computers understand is binary, 1s and 0s, this is difficult for humans to understand
For people to use computers, data they use must be encoded into binary for a comp. to process and share.
Way of encoding test is by using ASCII (most widely used coding system) to represent each character as a binary number
Examples of files stored in binary code
Text e.g. DOC files
Digital pictures e.g. bitmaps, JPG and GIF files
Sound files e.g. WAV or MP3 files
Program instructions are also stored in binary code.
CODING DATA
Some data is coded before it is stored, this changes the original data into a shortened version by assigning a code
When data is coded it is done to keep it short - saving storage space.
Speeds up data entry
Example coding
M/F for Male or Female
Y/N for Yes or No
DOB e.g. 22 March 1997 are coded as 22 03 1997
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