RecognizedAudio.WriteToWaveStream(Stream) Metode

Definisi

Ruang nama:

System.Speech.Recognition

Rakitan:

System.Speech.dll

Paket:

System.Speech v9.0.0-preview.5.24306.7

Sumber:

RecognizedAudio.cs

Menulis audio ke aliran dalam format Gelombang.

public:
 void WriteToWaveStream(System::IO::Stream ^ outputStream);

public void WriteToWaveStream (System.IO.Stream outputStream);

member this.WriteToWaveStream : System.IO.Stream -> unit

Public Sub WriteToWaveStream (outputStream As Stream)

Parameter

outputStream

Stream

Aliran yang akan menerima data audio.

Contoh

Contoh berikut membuat tata bahasa pengenalan ucapan untuk input nama, menambahkan handler untuk SpeechRecognized peristiwa, dan memuat tata bahasa ke dalam pengenal ucapan dalam proses. Kemudian menulis informasi audio untuk bagian nama input ke file audio. File audio digunakan sebagai input ke SpeechSynthesizer objek, yang mengucapkan frasa yang menyertakan audio yang direkam.

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);  
  }  
}  

Keterangan

Data audio ditulis dalam outputStream format Gelombang, yang mencakup header format file pertukaran sumber daya (RIFF).

Metode ini WriteToAudioStream menggunakan format biner yang sama, tetapi tidak menyertakan header Wave.

Lihat juga

• GetRange(TimeSpan, TimeSpan)
• WriteToAudioStream(Stream)