SpeechRecognitionEngine.SetInputToAudioStream 方法

定义

命名空间:

System.Speech.Recognition

程序集:

System.Speech.dll

包:

System.Speech v9.0.0-preview.3.24172.9

Source:

SpeechRecognitionEngine.cs

配置 SpeechRecognitionEngine 对象以接收来自音频流的输入。

public:
 void SetInputToAudioStream(System::IO::Stream ^ audioSource, System::Speech::AudioFormat::SpeechAudioFormatInfo ^ audioFormat);

public void SetInputToAudioStream (System.IO.Stream audioSource, System.Speech.AudioFormat.SpeechAudioFormatInfo audioFormat);

member this.SetInputToAudioStream : System.IO.Stream * System.Speech.AudioFormat.SpeechAudioFormatInfo -> unit

Public Sub SetInputToAudioStream (audioSource As Stream, audioFormat As SpeechAudioFormatInfo)

参数

audioSource

Stream

音频输入流。

audioFormat

SpeechAudioFormatInfo

这种音频输入的格式。

示例

以下示例演示演示基本语音识别的控制台应用程序的一部分。 该示例使用音频文件 example.wav 的输入，其中包含短语“测试一个二三”和“mister cooper”，用暂停分隔。 该示例生成以下输出。

Starting asynchronous recognition...  
  Recognized text =  Testing testing 123  
  Recognized text =  Mr. Cooper  
  End of stream encountered.  
Done.  

Press any key to exit...  

using System;  
using System.Globalization;  
using System.IO;  
using System.Speech.AudioFormat;  
using System.Speech.Recognition;  
using System.Threading;  

namespace InputExamples  
{  
  class Program  
  {  
    // Indicate whether asynchronous recognition is complete.  
    static bool completed;  

    static void Main(string[] args)  
    {  
      using (SpeechRecognitionEngine recognizer =  
        new SpeechRecognitionEngine(new CultureInfo("en-US")))  
      {  

        // Create and load a grammar.  
        Grammar dictation = new DictationGrammar();  
        dictation.Name = "Dictation Grammar";  

        recognizer.LoadGrammar(dictation);  

        // Configure the input to the recognizer.  
        recognizer.SetInputToAudioStream(  
          File.OpenRead(@"c:\temp\audioinput\example.wav"),  
          new SpeechAudioFormatInfo(  
            44100, AudioBitsPerSample.Sixteen, AudioChannel.Mono));  

        // Attach event handlers.  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(  
            SpeechRecognizedHandler);  
        recognizer.RecognizeCompleted +=  
          new EventHandler<RecognizeCompletedEventArgs>(  
            RecognizeCompletedHandler);  

        // Perform recognition of the whole file.  
        Console.WriteLine("Starting asynchronous recognition...");  
        completed = false;  
        recognizer.RecognizeAsync(RecognizeMode.Multiple);  

        while (!completed)  
        {  
          Thread.Sleep(333);  
        }  
        Console.WriteLine("Done.");  
      }  

      Console.WriteLine();  
      Console.WriteLine("Press any key to exit...");  
      Console.ReadKey();  
    }  

    // Handle the SpeechRecognized event.  
    static void SpeechRecognizedHandler(  
      object sender, SpeechRecognizedEventArgs e)  
    {  
      if (e.Result != null && e.Result.Text != null)  
      {  
        Console.WriteLine("  Recognized text =  {0}", e.Result.Text);  
      }  
      else  
      {  
        Console.WriteLine("  Recognized text not available.");  
      }  
    }  

    // Handle the RecognizeCompleted event.  
    static void RecognizeCompletedHandler(  
      object sender, RecognizeCompletedEventArgs e)  
    {  
      if (e.Error != null)  
      {  
        Console.WriteLine("  Error encountered, {0}: {1}",  
          e.Error.GetType().Name, e.Error.Message);  
      }  
      if (e.Cancelled)  
      {  
        Console.WriteLine("  Operation cancelled.");  
      }  
      if (e.InputStreamEnded)  
      {  
        Console.WriteLine("  End of stream encountered.");  
      }  

      completed = true;  
    }  
  }  
}  

注解

如果识别器在识别操作期间到达输入流的末尾，则识别操作使用可用的输入完成。 除非将输入更新到识别器，否则任何后续识别操作都可能会生成异常。

另请参阅

• SetInputToDefaultAudioDevice()
• SetInputToNull()
• SetInputToWaveFile(String)
• SetInputToWaveStream(Stream)
• RecognizeCompleted