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American English Pronunciation Dictionary

The American English Pronunciation Dictionary (AmEPD) is a General American English pronunciation dictionary.

Using John Wells' lexical sets, it has the following mergers:

  • TRAP-BATH
  • PALM-LOT (COT)
  • THOUGHT-CLOTH (CAUGHT)
  • NORTH-FORCE
  • FLEECE-HAPPY
  • KIT-EXPLORE

Additionally, the accent has the following mergers at syllable boundaries before /R/:

  • HURRY-FURRY
  • MERRY-MARRY-MARY
  • MIRROR-NEARER

The context tags are defined in the cainteoir.ttl file of the pos-tags project.

History

The Revision column in the tables below refers to the commit id of that version of the CMU pronunciation dictionary. Versions without a revision are available from the comp.speech FTP server. From cmudict 0.6d, Revision refers to the cmusphinx subversion repository commit id.

amepd

Version Date Revision Entries Words Variants Parts of Speech
0.0 2016-03-18 7825 131,920 121,883 10,037 0
0.1 2016-04-14 7825 128,627 121,958 5,970 1,252
0.2 2017-07-15 13090 129,064 124,265 4,070 1,304
master 2018-04-16 13090 129,030 124,384 3,918 1,304

Version 0.0 is based on cmudict 0.6e with the following entries removed: spelling-based entries, entries with non-letter characters, and hyphenated entries.

Version 0.2 incorporates the pronunciation fixes and additions from cmudict 0.7a, cmudict 0.7b, and cmudict-new.

cmudict-new

Commit Date AmEPD Entries Words Variants
132be0d6 2016-09-29 0.2 135,009 125,929 9,080
0c74d04e 2018-01-29 master 135,086 125,996 9,090

The cmudict-new dictionary is being maintained in the cmusphinx/cmudict GitHub repository.

The AmEPD column is the version of AmEPD that incorporates the specified version of cmudict-new.

cmudict

Version Date Revision Entries Words Variants
0.1 1993-09-15 99,279 96,151 3,498
0.2 1994-03-09 101,717 98,361 3,735
0.3 1994-09-27 110,934 107,400 3,914
0.4 1995-11-07 116,253 111,901 4,885
0.6 1998-10-19 127,068 120,031 7,672
0.6d 2008-02-19 7825 129,482 120,280 10,039
0.6e 2008-02-19 7825 133,751 124,272 10,329
0.7a 2014-02-17 12245 133,334 123,698 9,636
0.7b 2015-07-30 13090 134,373 125,770 8,603

Version 0.5 was not released publically.

Version 0.6e is a reconstruction of the unreleased 0.7 version, created by Alex I. Rudnicky, as described by the README.old file in the cmusphinx repository. This version is not officially released as 0.6e. It is from the 0.7a dictionary in the first revision of cmudict in the cmusphinx repository, which is used as the base of the 0.7a release.

License

Copyright (C) 1993-2015 Carnegie Mellon University. All rights reserved.
Copyright (C) 2016-2018 Reece H. Dunn (Cainteoir Technologies). All rights reserved.

The American English Pronunciation Dictionary is released under a 2-clause BSD license.

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