Code

Under one Code or Code /ko?t one becomes Regulation understood, in that Symbols a representation into such another to be transferred. For example that places a transmission regulation between and a succession more briefly and longer Sound signals ago. Generally linguistic usage understands one by a code usually one kept secret Code, to Coding by messages one uses. A code can exist of data, numbers, indications, letters or other storage mediums, in addition, for example also out strands.

Generally codes are however simple one Agreement between noting and reading, around an efficient production way for frequent Messages to establish. They serve for to the low-power or also safe recording and transmission of . In addition in place of the information simpler elements and combinations of these are used. These combinations refer to the original information. The more frequently something is used, the smaller should the expenditure for the processing of an element be.

Codes contain two aspects of Efficiency:

• On the one hand they replace the original by a pure Reference on this (the designated is replaced by the code word) and to need therefore it only one supply on references, that Recognizing bar and Distinction guaranteed (Mistake liberty).
• Secondly they mostly use Building block principle, as more frequent of references are made available by longer (vielelementige) combinations by short (wenigelementige) combinations and rarer of references. Thus the simplest elements become (Elements, of systems (z.B. ) and a certain develops national language, technical standards Beharrlicheit approximately Changes. Those Energy minimization codes make attractive for the information transfer under special conditions: large Distances, large Time intervals, large receiver number, Transmission at minimum expenditure in emergency situations, transmission with the help of other systems, which work in this energy and structure dynamic range.

  Note:

  • The use of references is efficient. Also within other ranges, like z.B. Simulation.
  • The use of a building block principle is efficient, if thereby the use of frequent simple elements is promoted.
  • Effects can also very indirectly (over a long Chain mediated) take place.

  uses that Term Code as name for standardized differences. (Guidance difference)

  Examples of codes

  • In u becomes. A. that (American standard code for information inter-CHANGE) uses, over , and Punctuation mark through . Today by that followed.
  • In the data communication one uses Cable code.
  • In that is that genetic code a guidance, after during that the information that / in Amino acid sequences are translated.
  • In the society are and as code systems.
  • In the InterNet is that Geekcode in or in .
  • With Program codes one as Source code
  • in that Aviation those IATA code and ICAO code.
  • in the language a characteristic that verbal communication (Soziolinguistik) that Soziolekt.

  Redundancy

  A code can be so developed that the result, into which it one coded, redundant, thus redundant information contains. That is, the produced succession of Symbols contains information, which does not lead to the goal and if one decodes them wrongly, a wrong result devoted.

  In the simplest case the same is again repeated. But each increased Predictableness from indications is Redundancy: Like that are z.B. those us after qs in the writing German everything redundantly, there on a q always a u follows. It would be lost thus to no information, if all were removed on a q the following US. The redundancy helps to decipher one however, important information despite a partial overrun still and be able to use. It protects thus forwards Information loss. Besides it permits to recognize falsified information as such. In the technology these redundancies purposefully by means of procedure that Channel encoding produced.

  See also:

  • Indication coding, , , Snippet