SpeechToText

The SpeechToText task converts an audio file or stream into a text transcript.

Parameters

Parameter Description Required
Type The task name. Specify SpeechToText. Yes
AudioUpsampling Whether to allow audio upsampling if the input audio has a sample rate too low for the task.  
ClassWordFile The path to a list of new words and weightings to add to the language model at load time.  
Conf Whether to generate word confidence scores.  
CustomLm The custom language model to use.  
Diag Whether to generate diagnostic information.  
DiagFile The alignment diagnostics file to generate.  
DnnFile The DNN file to use.  
DnnScale The DNN output acoustic score scaling factor.  
EndTime The end of an audio section to process.  
File The audio file to process. Yes, if InputType is File.
ForceRecompoundOff Whether to prevent recompounding.  
ForceRecompoundOn Whether to force recompounding.  
FrameDupl An integer value which allows for greater time efficiency with only a minimal loss of recognition accuracy.  
InputType The type of audio to process (file, binary data, or stream).  
Lang The language pack to use. Yes
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.  
Mode The algorithm mode for the speech-to-text process.  
ModeValue The value of the parameter associated with the speech-to-text algorithm mode.  
Out The file to write the transcription to. Yes
PronFile A file to use to either replace or add alternative pronunciations of words at language load time.  
Punctuation Whether to add punctuation to the word data.  
SpeedBiasLevel The balance between speed and accuracy in the decoder.  
StartTime The beginning of an audio section to process.  
SugdInputChannels The channel layout of the input media file. This parameter does not apply when InputType is Stream.  
SugdInputFrequency The sampling rate of the input media file. This parameter does not apply when InputType is Stream.  
WordBar Switches on word barring.  
WordBarList The location of a list of words to be barred.  

Examples

http://localhost:15000/action=AddTask&Type=SpeechToText&File=C:/myData/Speech.wav&Out=SpeechTranscript.ctm&Lang=ENUS

This action performs the WavToText task on the Speech.wav file and writes the results to the SpeechTranscript.ctm file. The Speech.wav file contains U.S. English dialect speech.

http://localhost:15000/action=AddTask&Type=StreamToText&Lang=ENUK&Out=Transcript1.ctm&InputType=Stream

This action transcribes the audio stream using the ENUK language pack and writes the results to the Transcript1.ctm file.


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