RecognizedAudio.GetRange(TimeSpan, TimeSpan) Méthode

public:
 System::Speech::Recognition::RecognizedAudio ^ GetRange(TimeSpan audioPosition, TimeSpan duration);

public System.Speech.Recognition.RecognizedAudio GetRange (TimeSpan audioPosition, TimeSpan duration);

member this.GetRange : TimeSpan * TimeSpan -> System.Speech.Recognition.RecognizedAudio

Public Function GetRange (audioPosition As TimeSpan, duration As TimeSpan) As RecognizedAudio

Paramètres

Retours

Retourne une sous-section de l'audio identifié, comme défini par audioPosition et duration.

Exceptions

Exemples

L’exemple suivant crée une grammaire de reconnaissance vocale pour l’entrée de nom, ajoute un gestionnaire pour l’événement SpeechRecognized et charge la grammaire dans un module de reconnaissance vocale en cours de traitement. Ensuite, il écrit les informations audio pour la partie nom de l’entrée dans un fichier audio. Le fichier audio est utilisé comme entrée dans un SpeechSynthesizer objet, qui parle une expression qui inclut l’audio enregistré.

private static void AddNameGrammar(SpeechRecognitionEngine recognizer)  
{  
  GrammarBuilder builder = new GrammarBuilder();  
  builder.Append("My name is");  
  builder.AppendWildcard();  

  Grammar nameGrammar = new Grammar(builder);  
  nameGrammar.Name = "Name Grammar";  
  nameGrammar.SpeechRecognized +=  
    new EventHandler<SpeechRecognizedEventArgs>(  
      NameSpeechRecognized);  

  recognizer.LoadGrammar(nameGrammar);  
}  

// Handle the SpeechRecognized event of the name grammar.  
private static void NameSpeechRecognized(  
  object sender, SpeechRecognizedEventArgs e)  
{  
  Console.WriteLine("Grammar ({0}) recognized speech: {1}",  
    e.Result.Grammar.Name, e.Result.Text);  

  try  
  {  

    // The name phrase starts after the first three words.  
    if (e.Result.Words.Count < 4)  
    {  

      // Add code to check for an alternate that contains the wildcard.  
      return;  
    }  

    RecognizedAudio audio = e.Result.Audio;  
    TimeSpan start = e.Result.Words[3].AudioPosition;  
    TimeSpan duration = audio.Duration - start;  

    // Add code to verify and persist the audio.  
    string path = @"C:\temp\nameAudio.wav";  
    using (Stream outputStream = new FileStream(path, FileMode.Create))  
    {  
      RecognizedAudio nameAudio = audio.GetRange(start, duration);  
      nameAudio.WriteToWaveStream(outputStream);  
      outputStream.Close();  
    }  

    Thread testThread =  
      new Thread(new ParameterizedThreadStart(TestAudio));  
    testThread.Start(path);  
  }  
  catch (Exception ex)  
  {  
    Console.WriteLine("Exception thrown while processing audio:");  
    Console.WriteLine(ex.ToString());  
  }  
}  

// Use the speech synthesizer to play back the .wav file  
// that was created in the SpeechRecognized event handler.  

private static void TestAudio(object item)  
{  
  string path = item as string;  
  if (path != null && File.Exists(path))  
  {  
    SpeechSynthesizer synthesizer = new SpeechSynthesizer();  
    PromptBuilder builder = new PromptBuilder();  
    builder.AppendText("Hello");  
    builder.AppendAudio(path);  
    synthesizer.Speak(builder);  
  }  
}  

S’applique à

Voir aussi

• WriteToWaveStream(Stream)
• WriteToAudioStream(Stream)