📄 mkbingram.txt
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MKBINGRAM(1) MKBINGRAM(1)
NAME
mkbingram - make binary N-gram from two arpa LMs
SYNOPSIS
mkbingram 2gram.arpa rev3gram.arpa bingram
DESCRIPTION
mkbingram makes a binary N-gram file for Julius from word 2-gram and
reverse word 3-gram LMs in ARPA standard format. Using the binary
file, the initial startup of Julius becomes much faster.
Note that the word 2-gram and reverse word 3-gram should be trained in
the same corpus, same parameters (i.e. cut-off thresholds) and have the
same vocabulary.
mkbingram can read gzipped ARPA file.
mkbingram that comes with Julius version 3.5 and later can generate
more size-optimized binary N-gram by using 24bit index instead of 32bit
and 2-gram backoff data compression. The byte order was also changed
from 3.5 to use the system's native order by default.
Although the old binary N-gram can be directly read by Julius, (in that
case Julius performs on-line conversion), you can also update your
binary N-gram using mkbingram using -d option.
Please note that binary N-gram file converted by mkbingram of version
3.5 and later cannot be read by Julius/Julian 3.4.2 and earlier.
OPTIONS
2gram.arpa
input word 2-gram file in ARPA standard format.
rev3gram.arpa
input reverse word 3-gram in ARPA standard format.
-d old_bingram
input binary N-gram file (for conversion from old format).
bingram
output binary N-gram file.
EXAMPLE
Convert ARPA files to binary format:
% mkbingram ARPA_2gram ARPA_rev_3gram outfile
Convert old binary N-gram file to new format:
% mkbingram -d old_bingram new_bingram
USAGE
You can specify the generated binary N-gram file on Julius/Julian using
option "-d".
SEE ALSO
julius(1)
VERSION
This version is provided as part of Julius-3.5.1.
COPYRIGHT
Copyright (c) 1991-2006 Kawahara Lab., Kyoto University
Copyright (c) 2000-2005 Shikano Lab., Nara Institute of Science and
Technology
Copyright (c) 2005-2006 Julius project team, Nagoya Institute of Tech-
nology
AUTHORS
LEE Akinobu (Nagoya Institute of Technology, Japan)
contact: julius-info at lists.sourceforge.jp
LICENSE
Same as Julius.
4.3 Berkeley Distribution LOCAL MKBINGRAM(1)
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