Media Server 25.3
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# ScoreCustomSpeechLanguageModel

Runs speech-to-text with a custom language model, compares the output to a transcript, and returns statistics about the accuracy. You can use this action to determine whether a custom language model needs further training or provides the accuracy that you require.

To use this action you must supply:

- Audio to use to test the custom language model.
- An accurate transcript of the speech contained in the audio. Media Server automatically normalizes the text for most languages.

- A session configuration that contains only a speech-to-text task, including the custom language model and other parameters that you intend to use. For example:

      [SpeechToText]
      Type=SpeechToText
      LanguagePack=ENUK
      SampleFrequency=16000
      CustomLanguageModel=MedicalTerms:0.1
      SpeedBias=2

Type: asynchronous

Parameter | Description | Required
--- | --- | ---
`AudioData` | The audio data to use for testing the custom language model. | Set either `AudioData` or `AudioPath`
`AudioPath` | The path of the audio file to use for testing the custom language model.
`Config` | A session configuration that contains the settings for the speech-to-text task (base64 encoded, unless you upload it as multipart form data). | Set `Config`, `ConfigName`, or `ConfigPath`
`ConfigName` | The name of a session configuration file that contains the settings for the speech-to-text task, when the file is stored in the ConfigDirectory.
`ConfigPath` | The path of a session configuration file that contains the settings for the speech-to-text task.
`TranscriptData` | The text file that contains an accurate transcript of the speech. | Set `TranscriptData` or `TranscriptPath`
`TranscriptPath` | The path of a text file that contains an accurate transcript of the speech.

## Example

The following example uses cURL to send the action to Media Server.

`curl http://localhost:14000/action=ScoreCustomSpeechLanguageModel -F AudioData=@speech.wav -F TranscriptData=@transcript.txt -F Config=@speechToTextTask.cfg`

## Response

This action is asynchronous, so Media Server always returns success accompanied by a token. You can use this token with the QueueInfo action to retrieve the status of your request.

The response from the `QueueInfo` action includes the elements `Fmeasure`, `precision`, and `recall`.

Copyright 2025 Open Text
Version 25.3 | Last updated July 2025

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Product: Knowledge Discovery Media Server 25.3

Topic Title: ScoreCustomSpeechLanguageModel