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(영문) A Mathematical Theory of Communication "정보"란 무엇인가?

A Mathematical Theory of Communication

October 29, 2006
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Here’s one of the most important scientific publications of the 20th century: A Mathematical Theory of Communication, by Claude Shannon.
The fundamental problem of communication is that of reproducing at one point either exactly or approximately a message selected at another point. Frequently the messages have meaning; that is they refer to or are correlated according to some system with certain physical or conceptual entities. These semantic aspects of communication are irrelevant to the engineering problem. The significant aspect is that the actual message is one selected from a set of possible messages. The system must be designed to operate for each possible selection, not just the one which will actually be chosen since this is unknown at the time of design.

A Mathematical Theory of Communication

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"A Mathematical Theory of Communication" is an influential 1948 article by mathematician Claude E. Shannon. The article was one of the founding works of the field of information theory. Shannon expanded the ideas of this article in a 1963 book with Warren Weaver titled The Mathematical Theory of Communication (ISBN 0-25-272548-4).
Shannon's diagram of a general communication system.
Shannon's article laid out the basic elements of communication:
  • An information source which produces a message
  • A transmitter which operates on the message to create a signal which can be sent through a channel
  • A channel, which is the medium over which the signal, carrying the information that composes the message, is sent
  • A receiver, which transforms the signal back into the message intended for delivery
  • A destination, which can be a person or a machine, for whom or which the message is intended
It also developed the concepts of information entropy and redundancy, and introduced the term bit as a unit of information.

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