.TH SPHINX_LM_EVAL 1 "2008-05-12"
.SH NAME
sphinx_lm_eval \- Evaluate perplexity of a transcription
.SH SYNOPSIS
.B sphinx_lm_eval
[\fI options \fR]...
.SH DESCRIPTION
.PP
This program evaluates the perplexity of a text file according to a
given language model.  The text file is assumed to be in transcript
format, i.e. one utterance per line, delimited by <s> and </s>.
.TP
.B \-help
Shows the usage of the tool
.TP
.B \-lm
model file
.TP
.B \-lmctlfn
file listing a set of language models
.TP
.B \-lmname
of language model in \fB\-lmctlfn\fR to use for all utterances
.TP
.B \-logbase
Base in which all log-likelihoods calculated
.TP
.B \-lsn
file to evaluate
.TP
.B \-lw
Language model weight
.TP
.B \-mmap
Use memory-mapped I/O for reading binary LM files
.TP
.B \-probdef
definition file for classes in LM
.TP
.B \-text
string to evaluate	
.TP
.B \-uw
Unigram probability weight (interpolated with uniform distribution)
.TP
.B \-verbose
Print details of perplexity calculation
.TP
.B \-wip
Word insertion probability
.SH AUTHOR
David Huggins-Daines <dhuggins@cs.cmu.edu>
.SH COPYRIGHT
Copyright \(co 2007-2008 Carnegie Mellon University.  See the file
\fICOPYING\fR included with this package for more information.
.br