---
name: "sphinx_lm_eval"
section: "1"
platform: "linux"
package: "sphinxbase-utils"
version: "0.8+5prealpha+1-21+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/sphinx_lm_eval"
---

# sphinx\_lm\_eval(1)

Evaluate perplexity of a transcription

## NAME

sphinx\_lm\_eval - Evaluate perplexity of a transcription

## SYNOPSIS

**sphinx\_lm\_eval** \[ *options* \]...

## DESCRIPTION

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\>.

- **-help**

  Shows the usage of the tool

- **-lm**

  model file

- **-lmctlfn**

  file listing a set of language models

- **-lmname**

  of language model in **-lmctlfn** to use for all utterances

- **-logbase**

  Base in which all log-likelihoods calculated

- **-lsn**

  file to evaluate

- **-lw**

  Language model weight

- **-mmap**

  Use memory-mapped I/O for reading binary LM files

- **-probdef**

  definition file for classes in LM

- **-text**

  string to evaluate

- **-uw**

  Unigram probability weight (interpolated with uniform distribution)

- **-verbose**

  Print details of perplexity calculation

- **-wip**

  Word insertion probability

## AUTHOR

David Huggins-Daines \<dhuggins@cs.cmu.edu\>

## COPYRIGHT

Copyright © 2007-2008 Carnegie Mellon University.  See the file *COPYING* included with this package for more information.\