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An insight into the entropy and redundancy of the English dictionary

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2 Author(s)
Yannakoudakis, E.J. ; Postgraduate Sch. of Comput. Sci., Bradford Univ., UK ; Angelidakis, G.

The inherent statistical characteristics, including the economy, entropy, and redundancy, of a very large set containing 93681 words from the Shorter Oxford English Dictionary is investigated. Analytical n -gram statistics are also presented for applications in natural language understanding, text processing, test compression, error detection and correction, and speech synthesis and recognition. Experimental results show how the distribution of n-grams in the dictionary varies from the ideal as n increases from 2 to 5, that is, from bigrams to pentagrams; it is shown that the corresponding redundancy increases from 0.1067 to 0.3409. The results are of interest because, (1) the dictionary provides a finite list for deterministic analyses, (2) each entry (word) appears once, compared to free-running text where words are repeated, and (3) all entries, even rarely occurring ones, have equal weight

Published in:

Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:10 ,  Issue: 6 )

Date of Publication:

Nov 1988

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