Data Compression


Criteria

Survey Formats

Basics

Basic Terms

Symbol

Set of Symbols

Alphabet

Code

Coding

Redundancy

Information Theory

Message

Probability

Information

Entropy

Redundancy Reduction

Irrelevance Reduction

Entropy Coding

Variable Length Codes

Code Trees

Compression Methods

Data Formats


Glossary

Index


Download


www.BinaryEssence.com

Alphabet


The elements of an alphabet are identical with those in a set of symbols. The difference is that an alphabet has an internal order. A set of symbols is an unordered collection.


Two different symbols of an alphabet can be compared because each symbol has a fixed position within the alphabet. This position provides the values for logical comparisons.
('a' is less than 'b', 'c' is greater than 'b').


 <   ^   > 

Survey Basic Terms Set of Symbols Code