C#程序員干貨系列之語音識別

說實話，這些年來從博客園收獲了不少東西。自從當年注冊以來就想平時分享點簡單的小程序啥的。因為平時比較懶，突然發現近2年沒更新了。准備陸續分享些小程序，這些也算是本猿手頭上的一些自制小工具吧。

以后會陸續分享些WPF的自制按鈕控件。

 

語音識別小程序，調用了windows的識別組件。精簡了一些代碼，算是比較簡單易懂的一個語音識別類。

開發測試環境win7，VS2008。如果有其它環境中的，歡迎補充。

 

SRecognition.cs

using System;
using System.Speech.Recognition;
using System.Globalization;
using System.Windows.Forms;

namespace NingTao
{
  public class SRecognition
  {
    public SpeechRecognitionEngine recognizer = null;//語音識別引擎  
    public DictationGrammar dictationGrammar = null; //自然語法  
    public System.Windows.Forms.Control cDisplay; //顯示控件  

    public SRecognition(string[] fg) //創建關鍵詞語列表  
    {
      CultureInfo myCIintl = new CultureInfo("zh-CN");
      foreach (RecognizerInfo config in SpeechRecognitionEngine.InstalledRecognizers())//獲取所有語音引擎  
      {
        if (config.Culture.Equals(myCIintl) && config.Id == "MS-2052-80-DESK")
        {
          recognizer = new SpeechRecognitionEngine(config);
          break;
        }//選擇識別引擎
      }
      if (recognizer != null)
      {
        InitializeSpeechRecognitionEngine(fg);//初始化語音識別引擎  
        dictationGrammar = new DictationGrammar();
      }
      else
      {
        MessageBox.Show("創建語音識別失敗");
      }
    }
    private void InitializeSpeechRecognitionEngine(string[] fg)
    {
      recognizer.SetInputToDefaultAudioDevice();//選擇默認的音頻輸入設備  
      Grammar customGrammar = CreateCustomGrammar(fg);
      //根據關鍵字數組建立語法  
      recognizer.UnloadAllGrammars();
      recognizer.LoadGrammar(customGrammar);
      //加載語法  
      recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
      //recognizer.SpeechHypothesized += new EventHandler <SpeechHypothesizedEventArgs>(recognizer_SpeechHypothesized);  
    }
    public void BeginRec(Control tbResult)//關聯窗口控件  
    {
      TurnSpeechRecognitionOn();
      TurnDictationOn();
      cDisplay = tbResult;
    }
    public void over()//停止語音識別引擎  
    {
      TurnSpeechRecognitionOff();
    }
    public virtual Grammar CreateCustomGrammar(string[] fg) //創造自定義語法  
    {
      GrammarBuilder grammarBuilder = new GrammarBuilder();
      grammarBuilder.Append(new Choices(fg));
      return new Grammar(grammarBuilder);
    }
    private void TurnSpeechRecognitionOn()//啟動語音識別函數  
    {
      if (recognizer != null)
      {
        recognizer.RecognizeAsync(RecognizeMode.Multiple);
        //識別模式為連續識別  
      }
      else
      {
        MessageBox.Show("創建語音識別失敗");
      }
    }
    private void TurnSpeechRecognitionOff()//關閉語音識別函數  
    {
      if (recognizer != null)
      {
        recognizer.RecognizeAsyncStop();
        TurnDictationOff();
      }
      else
      {
        MessageBox.Show("創建語音識別失敗");
      }
    }
    private void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {
      //識別出結果完成的動作，通常把識別結果傳給某一個控件  
      string text = e.Result.Text;
      cDisplay.Text += text;
    }
    private void TurnDictationOn()
    {
      if (recognizer != null)
      {
        recognizer.LoadGrammar(dictationGrammar);
        //加載自然語法  
      }
      else
      {
        MessageBox.Show("創建語音識別失敗");
      }
    }
    private void TurnDictationOff()
    {
      if (dictationGrammar != null)
      {
        recognizer.UnloadGrammar(dictationGrammar);
        //卸載自然語法  
      }
      else
      {
        MessageBox.Show("創建語音識別失敗");
      }
    }
  }
}

 

form調用，其中2個按鈕（開始，停止），1個文本框（識別結果）

using System;
using System.Windows.Forms;

namespace NingTao
{
  public partial class Form1 : Form
  {
    private SRecognition sr;

    public Form1()
    {
      InitializeComponent();

      string[] fg = { "東方", "西方", "南方", "北方" };
      sr = new SRecognition(fg);
      button2.Enabled = false;
    }

    private void button1_Click(object sender, EventArgs e)
    {
      sr.BeginRec(textBox1);
      button1.Enabled = false;
      button2.Enabled = true;
    }

    private void button2_Click(object sender, EventArgs e)
    {
      sr.over();
      button1.Enabled = true;
      button2.Enabled = false;
    }
  }
}

 

然后就可以測試語音識別了。

 

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