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# LmPerplexity

The `LmPerplexity` task analyzes the perplexity of a sample text file, when given a specific language model.

## Parameters

Parameter | Description | Required
--- | --- | ---
Type | The task name. Set to `LmPerplexity`. | Yes
CaseMap | Whether to ignore casing. |
ChronosCompat | Whether to treat `<s>` context reset markers in the same way as in the decoder. |
Clm | The custom language model to use in conjunction with a base model. |
CWeight | The interpolation weight of the custom language model, if applicable. |
Out | The log file to generate. | Yes
Text | The sample text file. | Yes
Tlm | The language model to use. | Yes

## Example

    http://localhost:13000/action=AddTask&Type=LmPerplexity&Text=C:\data\transcript.txt&Tlm=C:\LP\ENUK\ver-ENUK-5.0.tlm&Out=PerpScore.ctm

This action uses port `13000` to instruct Speech Server, which is located on the local machine, to calculate the perplexity of the `ver-ENUK-5.0.tlm` language model using the `transcript.txt` sample text, and write the results to the `PerpScore.ctm` file.

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