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# ClusterSpeechToTextTel

The `ClusterSpeechToTextTel` task performs clustering of two speakers in a phone call, and uses the resulting speaker clusters to improve speech-to-text performance slightly by using speaker-sided acoustic normalization. As before, any telephony artifacts such as dial tones or DTMF tones are included, interspersed with the recognized words.

## Parameters

Parameter | Description | Required
--- | --- | ---
Type | The task name. Set to `ClusterSpeechToTextTel`. | Yes
Conf | Whether to generate word confidence scores. |
Diag | Whether to generate diagnostic information. |
DiagFile | The file to write the diagnostic information to. |
DnnScale | The DNN output acoustic score scaling factor. |
File | The input audio file. |
FixTime | A fixed size for speaker clusters. |
Lang | The name of a language pack. |
LatFile | The name of the lattice file that contains word hypotheses. |
LatScale | The depth of the lattice. |
LatWinSize | The size (in seconds) of the lattice output window. |
LatWordFile | A list of words to find. |
MaxNumSpeakers | The final maximum number of speakers to produce. |
MergeThresh | The threshold below which to merge clusters. |
MinNumSpeakers | The final minimum number of speakers to produce. |
Mode | The algorithm mode for the speech-to-text process. |
ModeValue | Sets the value of the parameter associated with the speech-to-text algorithm mode. |
NormFile | The acoustic normalization file to use. |
Out | The file that IDOL Speech Server writes task output to. |
SampleFrequency | The sample frequency of the audio file to process. |
SilThresh | The threshold between what the task identifies as silence and non-silence. |
SpeechThresh | The threshold between speech and non-speech (music or noise). |
SugdInputChannels | The channel layout of the input media file. |
SugdInputFrequency | The sampling rate of the input media file. |

## Example

    http://localhost:13000/action=AddTask&Type=ClusterSpeechToTextTel&File=C:/myData/Speech.wav&Out=SpeechTranscript.ctm&Lang=ENUS

This action uses port `13000` to instruct IDOL Speech Server, which is located on the local machine, to perform the `ClusterSpeechToTextTel` task on the `Speech.wav` file and write the results to the `SpeechTranscript.ctm` file. The `Speech.wav` file contains U.S. English dialect speech.

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