IEVref:171-07-28ID:
Language:enStatus: Standard
Term: character mean entropy
Synonym1: character mean information content
[Preferred]
Synonym2: character average information
[Admitted]
Synonym3: content character information rate
[Admitted]
Symbol: H ′ MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaiGc9aspC0FXdbbc9asFfpec8Eeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmaadiWaaiWabaabaiaafaaake aaceWGibGbauaaaaa@3DE0@
Definition: mean per character of the entropy for all possible messages from a stationary message source

H ′ = lim m→∞ H m m MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaiGc9aspC0FXdbbc9asFfpec8Eeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmaadiWaaiWabaabaiaafaaake aaceWGibGbauaacqGH9aqpdaWfqaqaaKqzafGaciiBaiaacMgacaGG TbaaleaacaWGTbGaeyOKH4QaeyOhIukabeaakmaalaaabaGaamisam aaBaaaleaacaWGTbaabeaaaOqaaiaad2gaaaaaaa@49EF@

where Hm is the entropy of the set of all sequences of m characters from the source

Note 1 to entry: The character mean entropy can be expressed in a unit such as the shannon per character.

Note 2 to entry: The limit might not exist if the source were not stationary.


Publication date:2019-03-29
SourceIEC 80000-13:2008, 13-37, modified – Addition of information useful for the context of the IEV, and adaptation to the IEV rules
Replaces:
Internal notes:
CO remarks:
TC/SC remarks:
VT remarks:
Domain1:
Domain2:
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Domain5: