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- W2090428148 abstract "Some speech recognition systems use alternative lexical forms to cover various pronunciations encountered when people speak. However, excess forms in the lexicon degrade recognition performance. Thus lexicons should maximize coverage of actual pronunciations that occur, while minimizing the number of alternative pronunciations. A set of phonological rules for English as been developed at SRI to cover a large body of transcriptions of sentences read by American speakers. This phonological rule set covers 98.5% of the segments in a separate set of transcriptions. Rule efficiency can be defined as the ratio of the number of times forms generated by a rule were spoken in a corpus of test data to the number of forms generated by the rule for the sentences in that test data. By this definition, palatalization of /t/ and /d/ before tautosyllabic /r/ is efficient, while flapping of /t/ that follows /l/ is not. There is a trade-off between the coverage of a rule set and the number of alternative pronunciations generated by the rule set. Rule efficiency can be used to rank rules in a rule set, to derive a family of rule sets that maximize coverage for a given number of alternative forms represented, or to select among alternative rule sets. [Work supported by DARPA.]" @default.
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- W2090428148 date "1988-11-01" @default.
- W2090428148 modified "2023-09-27" @default.
- W2090428148 title "Measures of phonological rule set coverage" @default.
- W2090428148 doi "https://doi.org/10.1121/1.2026173" @default.
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