Here is a complete example of using C # and System.Speech to convert from speech to text
The code can be divided into two main parts:
setting up the SpeechRecognitionEngine object (and its necessary elements) for processing speech speech and voice hypotheses.
Step 1: Configure SpeechRecognitionEngine
_speechRecognitionEngine = new SpeechRecognitionEngine(); _speechRecognitionEngine.SetInputToDefaultAudioDevice(); _dictationGrammar = new DictationGrammar(); _speechRecognitionEngine.LoadGrammar(_dictationGrammar); _speechRecognitionEngine.RecognizeAsync(RecognizeMode.Multiple);
At this point, your object is ready to begin transcribing sound from the microphone. However, you need to handle some events in order to access the results.
Step 2: Handling SpeechRecognitionEngine Events
_speechRecognitionEngine.SpeechRecognized - = new EventHandler (SpeechRecognized); _speechRecognitionEngine.SpeechHypothesized - = new EventHandler (SpeechHypothesizing);
_speechRecognitionEngine.SpeechRecognized + = new EventHandler (SpeechRecognized); _speechRecognitionEngine.SpeechHypothesized + = new EventHandler (SpeechHypothesizing);
private void SpeechHypothesizing (object sender, SpeechHypothesizedEventArgs e) {/// real-time results from the engine string realTimeResults = e.Result.Text; }
private void SpeechRecognized (object sender, SpeechRecognizedEventArgs e) {/// final response from the engine string finalAnswer = e.Result.Text; }
Here it is. If you want to use a pre-recorded .wav file instead of a microphone, you should use
_speechRecognitionEngine.SetInputToWaveFile (pathToTargetWavFile);
instead
_speechRecognitionEngine.SetInputToDefaultAudioDevice ();
There are many different options in these classes, and they are worth exploring in more detail.
http://ellismis.com/2012/03/17/converting-or-transcribing-audio-to-text-using-c-and-net-system-speech/