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3 in 4 encoding

3-in-4 coding is a character-oriented coding method.

The 3-in-4 method can be used to transmit user data with any structure. The user data is encoded in such a way that only characters are generated that are not reserved for control messages. A disadvantage is the very large overhead of 33% ( transmission time, data volume), since the user data are each converted in blocks of 3 bytes into blocks of 4 bytes of the channel signal. 3-in-4 coding is used, for example, for transparent transmission of telesoftware in T-Online.

Englisch: 3 in 4 encoding
Updated at: 04.02.2003
#Words: 83
Links: coding, method, user, data, overhead (OH)
Translations: DE

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