Microsoft语音识别引擎在语法之间切换

Question

所以我有这个语音识别代码，我一直在使用微软的语音识别引擎。

不幸的是，它在理解声音方面并不是很好，所以我一直在想办法解决这个问题。其中之一是在特定语法和通用词典语法之间切换。我似乎不知道如何在语法之间切换，尽管在这种情况下，人们无法识别给定的语音。

如果有人能帮我弄清楚如何构建这个，再次强调，只要我的commandList语法无法识别所拾取的语音，就可以从我的commandeList语法切换到DictationGrammar（）。

这是代码：

//using Microsoft.Speech.Recognition;
using System;
using System.Speech.Recognition;
using System.Windows.Forms;
using System.Collections.Generic;
namespace vRec
{
  public class Form1
  {
      static int counter = 0;
      static bool stop = false;
      static string command = null;
      static List<String> commandList = new List<string>() { "zooey", "open", "quit", "search", "close", "yes", "no" };
      static Choices keywords = new Choices();
     public static void Main()
    {
        command = null;
        stop = false;
      // Create an in-process speech recognizer for the en-US locale.
      using (
       SpeechRecognitionEngine recognizer =
        new SpeechRecognitionEngine(
          new System.Globalization.CultureInfo("en-US")))
      {
        keywords.Add(commandList.ToArray());
        GrammarBuilder grammarBuilder = new GrammarBuilder(keywords);
        Grammar testGrammar = new Grammar(grammarBuilder);
        recognizer.LoadGrammar(testGrammar);
        recognizer.LoadGrammar(new DictationGrammar());
        // Add a handler for the speech recognized event.
        recognizer.SpeechRecognized += 
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
        // Configure input to the speech recognizer.
        recognizer.SetInputToDefaultAudioDevice();
        // Start asynchronous, continuous speech recognition.
        recognizer.RecognizeAsync(RecognizeMode.Multiple);
        Console.WriteLine("NOT TERMINATED");
         // Keep the console window open.
         if(!stop)
         Console.ReadLine();
    }
 }
    // Handle the SpeechRecognized event.
    public static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {
        if (counter == 2 && (e.Result.Text.ToUpper() == "YES" || e.Result.Text.ToUpper() == "US" || e.Result.Text.ToUpper() == "AS"))
        {
            counter = 0;
            Console.WriteLine("THANK YOU LORD JEBUS");
            stop = true;
            SendKeys.SendWait("{ENTER}");
            //command string to be passed in for functions in c++ code
        }
        else if (counter == 2 && (e.Result.Text.ToUpper() == "NO" || e.Result.Text.ToUpper() == "NOW" || e.Result.Text.ToUpper() == "KNOW" || e.Result.Text.ToUpper() == "OH" || e.Result.Text.ToUpper() == "NOT" || e.Result.Text.ToUpper() == "NOPE" || e.Result.Text.ToUpper() == "NAH"))
        {
            Console.WriteLine("Can you spell that?");
            counter = 1;
            command = e.Result.Text;
        }
        else if (counter == 2 && (e.Result.Text.ToUpper() != "YES" || e.Result.Text.ToUpper() != "US" || e.Result.Text.ToUpper() != "AS" || e.Result.Text.ToUpper() != "NO" || e.Result.Text.ToUpper() != "NOW" || e.Result.Text.ToUpper() != "KNOW" || e.Result.Text.ToUpper() != "OH" || e.Result.Text.ToUpper() != "NOT" || e.Result.Text.ToUpper() != "NOPE" || e.Result.Text.ToUpper() != "NAH"))
        {
            //Console.WriteLine(counter);
            Console.WriteLine("Can you repeat that?");
            counter = 1;
        }
        if (counter == 1) 
        {
            command = e.Result.Text;
            if (e.Result.Text.ToUpper() == "ALL BEEN" || e.Result.Text.ToUpper() == "OPIUM" || e.Result.Text.ToUpper() == "OLD AND" || e.Result.Text.ToUpper() == "HOLE IN" || e.Result.Text.ToUpper() == "HOPING" || e.Result.Text.ToUpper() == "OLD BEEN" || e.Result.Text.ToUpper() == "OPEN")
                command = "open";
            if (e.Result.Text.ToUpper() == "WAIT" || e.Result.Text.ToUpper() == "QUITE" || e.Result.Text.ToUpper() == "QUIP" || e.Result.Text.ToUpper() == "QUICK" || e.Result.Text.ToUpper() == "CLIP" || e.Result.Text.ToUpper() == "QUIT")
                command = "quit";
            if (e.Result.Text.ToUpper() == "SUCH" || e.Result.Text.ToUpper() == "SORT" || e.Result.Text.ToUpper() == "SEARCH")
                command = "search";
            if (e.Result.Text.ToUpper() == "RULES" || e.Result.Text.ToUpper() == "FELLOWS" || e.Result.Text.ToUpper() == "CLOSE")
                command = "close";
            commandList.Add(command);
            Console.WriteLine(counter);
            Console.WriteLine("Recognized text: " + command);
            Console.WriteLine("Is this correct?");
            for (int i = 0; i < commandList.Count; i++)
            {
                Console.WriteLine("/" + commandList[i]);
            }
            counter++;
        }
        if (e.Result.Text.ToUpper() == "ZOOEY" || e.Result.Text.ToUpper() == "ZOE" || e.Result.Text.ToUpper() == "EASILY" || e.Result.Text.ToUpper() == "SALLY" || e.Result.Text.ToUpper() == "ZONE" || e.Result.Text.ToUpper() == "ZONE WE" || e.Result.Text.ToUpper() == "SOLELY" || e.Result.Text.ToUpper() == "ZOELLICK" && counter == 0)
        {
            counter++;
            Console.WriteLine("How can I help you?");
        }
        Console.WriteLine("Recognized text: " + e.Result.Text);
    }
    public static string getCommand()
    {
        return command;
    }
  }
}

如有任何帮助，我们将不胜感激。^.^

Answer 1

我可以想到的一种方法：

设置一个置信阈值，任意选择0.6，如果在recognizer_SpeechRecognized方法中拾取的语音低于该阈值，则切换语法。为此，您应该将"SpeechRecognitionEngine.UnloadAllGrammars"与SpeechRecognitionEngine.LoadGrammarAsync结合使用为了获得识别语音的置信度，

e.Result.Confidence`, so your code could look like: 
    if (e.Result.Confidence <0.6)  {
      recognizer.RequestRecognizerUpdate();
      recognizer.UnloadAllGrammars();
      recognizer.LoadGrammarAsync(//switch your grammmars);
    }

你必须看看你的语法是否可用，等等。在此范围内。希望这能有所帮助！