SpeechRecognizer.AudioPosition 属性

public:
 property TimeSpan AudioPosition { TimeSpan get(); };

public TimeSpan AudioPosition { get; }

member this.AudioPosition : TimeSpan

Public ReadOnly Property AudioPosition As TimeSpan

属性值

它接收输入一个识别器的音频输入流中的当前位置。

示例

在以下示例中，共享语音识别器使用听写语法来匹配语音输入。 当语音识别器在其输入处检测到语音时，事件的处理程序SpeechDetected会将 、 RecognizerAudioPosition和 AudioLevel 写入控制台AudioPosition。

using System;
using System.Speech.Recognition;

namespace SampleRecognition
{
  class Program
  {
    private static SpeechRecognizer recognizer;
    public static void Main(string[] args)
    {

      // Initialize a shared speech recognition engine.
      recognizer = new SpeechRecognizer();

      // Add handlers for events.
      recognizer.LoadGrammarCompleted +=
        new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);
      recognizer.SpeechRecognized +=
        new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
      recognizer.StateChanged +=
        new EventHandler<StateChangedEventArgs>(recognizer_StateChanged);
      recognizer.SpeechDetected +=
        new EventHandler<SpeechDetectedEventArgs>(recognizer_SpeechDetected);

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

      // Load the grammar object to the recognizer.
      recognizer.LoadGrammarAsync(dictation);

      // Keep the console window open.
      Console.ReadLine();
    }

    // Gather information about detected speech and write it to the console.
    static void recognizer_SpeechDetected(object sender, SpeechDetectedEventArgs e)
    {
      Console.WriteLine();
      Console.WriteLine("Speech detected:");
      Console.WriteLine("  Audio level: " + recognizer.AudioLevel);
      Console.WriteLine("  Audio position: " + recognizer.AudioPosition);
      Console.WriteLine("  Recognizer audio position: " + recognizer.RecognizerAudioPosition);
    }

    // Write the text of the recognition result to the console.
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {
      Console.WriteLine("Speech recognized: " + e.Result.Text);

      // Add event handler code here.
    }

    // Write the name of the loaded grammar to the console.
    static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)
    {
      Console.WriteLine("Grammar loaded: " + e.Grammar.Name);
    }

    // Put the shared speech recognizer into "listening" mode.
    static void recognizer_StateChanged(object sender, StateChangedEventArgs e)
    {
      if (e.RecognizerState != RecognizerState.Stopped)
      {
        recognizer.EmulateRecognizeAsync("Start listening");
      }
    }
  }
}

注解

共享识别器在桌面语音识别运行时接收输入。

属性 AudioPosition 引用输入设备在其生成的音频流中的位置。 相比之下， RecognizerAudioPosition 属性引用识别器在处理音频输入时的位置。 这些位置可能不同。 例如，如果识别器已收到尚未生成识别结果的输入， RecognizerAudioPosition 则该属性的值小于属性的值 AudioPosition 。

另请参阅

• RecognizerAudioPosition