RecognizedAudio.GetRange(TimeSpan, TimeSpan) Metode

Definisi

Ruang nama:

System.Speech.Recognition

Rakitan:

System.Speech.dll

Paket:

System.Speech v9.0.0-preview.5.24306.7

Sumber:

RecognizedAudio.cs

Memilih dan mengembalikan bagian dari audio yang dikenali saat ini sebagai data biner.

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

Parameter

audioPosition

TimeSpan

Titik awal data audio yang akan dikembalikan.

duration

TimeSpan

Panjang segmen yang akan dikembalikan.

Mengembalikan

RecognizedAudio

Mengembalikan subbagian audio yang dikenali, seperti yang ditentukan oleh audioPosition dan duration.

Pengecualian

ArgumentOutOfRangeException

audioPosition dan duration tentukan segmen audio di luar rentang segmen saat ini.

InvalidOperationException

Audio yang dikenali saat ini tidak berisi data.

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);  
  }  
}  

Lihat juga

• WriteToWaveStream(Stream)
• WriteToAudioStream(Stream)