Add-on

IBM Watson Speech to Text

Use IBM Watson Speech to Text to transcribe Twilio audio recordings into text.

The IBM Watson Speech to Text Add-on can convert Twilio audio recordings into text. This easy-to-use service uses machine intelligence to combine information about grammar and language structure with knowledge of audio signal as well as keyword detection to generate a transcript of the recording.

Click here for additional information. Click here to see Speech to Text in action.

  • Language Support

    Supports US English, UK English, Spanish, Brazilian Portuguese, and Mandarin, with additional languages in development.

  • Word Alternatives and Timestamps

    Reports alternative words that are acoustically similar to the words that it transcribes, confidence levels for each of the words that it transcribes, and timestamps for the start and end of each word.

  • Profanity Filtering

    Censors profanity from US English transcriptions by default. You can use the filtering to sanitize the service's output.

  • Smart Formatting (beta)

    Converts dates, times, numbers, phone numbers, and currency values in final transcripts of US English audio into more readable, conventional forms.

Sample annotation responses

API Response JSON

IBM Watson Speech to Text is capable of converting audio input into written text. Output features include word alternatives, confidence levels, timestamps, and profanity filtering. Sample JSON payload is included below. Please see Documentation tab for complete asynchronous response flow.

{
   "results": [
      {
         "alternatives": [
            {
               "timestamps": [
                  ["several":, 1.0, 1.51],
                  ["tornadoes":, 1.51, 2.15],
                  ["touch":, 2.15, 2.5],
                  . . .
               ]
            },
            {
               "confidence": 0.8691191673278809,
               "transcript": "several tornadoes touch down as a line of severe thunderstorms swept through colorado on sunday "
            },
            {
               "transcript": "several tornadoes touched down as a line of severe thunderstorms swept through colorado on sunday "
            },
            {
               "transcript": "several tornadoes touch down is a line of severe thunderstorms swept through colorado on sunday "
            }
         ],
         "final": true
      }
   ],
   "result_index": 0
}
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