Information Theory

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Issue:

Science

 

Written by:

Amber M

 

Date added:

December 26, 2015

 

Level:

University

 

Grade:

B

 

No of pages / words:

6 / 1500

 

Was viewed:

3093 times

 

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Essay content:

It is possible to surround a noisy channel with appropriate encoding and decoding systems, such that messages can be communicated at any rate less than (but arbitrarily close to) the channel capacity with an arbitrarily small probability of error. Information theory in the 1950s was sometimes classified as a branch of the then voguish field called "cybernetics", which included many aspects of potential machine representation of the world; it is a broad and deep mathematical theory, with equally broad and deep applications, chief among them coding theory...
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These codes can be roughly subdivided into data compression and error-correction codes. It took many years to find the good codes whose existence Shannon proved. A third class of codes are cryptographic ciphers; concepts from coding theory and information theory are much used in cryptography and cryptanalysis; see the article on deciban for an interesting historical application...
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