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# LangIdBndLif

The `LangIdBndLif` task reads in language identification features from file and determines boundaries in the feature sequence where the language changes. It returns the language identification results between boundaries.

## Parameters

Parameter | Description | Required
--- | --- | ---
Type | The task type. Set to `LangIDBndLif`. | Yes
Beam | The beam width of the search process. |
ClassList | A list of language classifiers to use. |
ClassPath | The path to the directory containing the language classifiers. |
File | The language identification feature (.lif) file to process. | Yes
LangList | A subset of languages to use from the classifier list file. |
MinPhoneRate | The minimum phone rate (phones per second). |
NBest | The maximum number of language candidates to include in the output file. |
Out | The file to write language identification results to. | Yes
OutB | The file to write boundary point information to. | Yes
SegSize | The maximum results segment size. |
SegSmoothWin | The size of the smoothing window. |
SegStep | The step size in phones of the analysis window. |

Note: The `ClassList` parameter is required only if you want to change the audio sample rate, or if you want to use your own custom classifiers. You might also need to specify the `ClassPath` parameter, depending on the location of the classifier files.

## Example

    http://localhost:13000/action=AddTask&Type=LangIdBndLif&File=C:\Data\Speech.lif&ClassList=ListManager/OptClassSet&ClassPath=C:\LangID\&Out=SpeechLang1.ctm&OutB=SpeechBnd.ctm

This action uses port `13000` to instruct Speech Server, which is located on the local machine, to identify languages and language boundaries in the `Speech.lif` file using the language classifiers specified in the `OptClassSet` list. The action instructs IDOL Speech Server to write the identification results to the `SpeechLang1.ctm` file and the boundary information to the `SpeechBnd.ctm` file.

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