语音识别程序随机显示预定义的单词(在“ GramarBuilder()”中定义)以显示语法中不存在的那些已说出的单词

我是C#的新手,我不确定是否在正确的论坛上写作.我正在构建简单的语音识别程序,该程序将语音命令作为输入,执行语音到文本的翻译,然后搜索与该文本匹配的视频.

I am using grammarBuider() and define my own grammar for more
accurate speech recognition. But the problem is: when any word that
doesn’t exit in grammar is spoken, the program starts
any displaying/writing existing word randomly which were defined in
grammar.

所以,

What I want is: If any word that doesn’t exist in my grammar Grammarbuilder is spoken, the program should not write any or any random word from grammar on screen. Instead, it should display a message to user i.e. “word you spoke doesn’t exist in program’s grammar OR no video found matching to your voice search”

谁能告诉我如何解决此问题？
这是我的代码.

   public Form1()
    {
        InitializeComponent();
    }


    private void btnStart_Click(object sender, EventArgs e)
    {
        btnStart.Enabled = false;
            btnStop.Enabled = true;
            clist.Add(new string[] { "go away", "able", "active", "actual", "afraid", "busy", "casual" });
            Grammar gr = new Grammar(new GrammarBuilder(clist));
            try
            {
                sre.RequestRecognizerUpdate();
                sre.LoadGrammar(gr);
                sre.SpeechRecognized+= sre_SpeechRecognized;
                sre.SetInputToDefaultAudioDevice();
                sre.RecognizeAsync(RecognizeMode.Multiple);


            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error");

            }

    }
        void sre_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            textBoxContent.Text += e.Result.Text.ToString() + Environment.NewLine;     


        }

    private void btnStop_Click(object sender, EventArgs e)
    {

            sre.RecognizeAsyncStop();
            btnStart.Enabled = true;
            btnStop.Enabled = false;

    }
}

解决方法:

每个识别结果都有一个confidence score-正确识别短语的确定性的相对度量.无论您的置信度是高还是低,您的SpeechRecognitionEngine看起来都会引发SpeechRecognized事件,从而提供最佳匹配.识别语法中未包含的单词时,请尝试检查这些分数.如果我是对的,这就是问题所在,那么您可以使用以下选项：

>在sre_SpeechRecognized处检查e.Result.Confidence,如果分数太低,则向用户显示一条消息
>尝试为SpeechRecognitionEngine设置置信度阈值并处理SpeechRecognitionRejected事件. MSDN声称

If your application is using a SpeechRecognitionEngine instance, you can modify the confidence level at which speech input is accepted or rejected with one of the UpdateRecognizerSetting methods.

尝试调用SpeechRecognitionEngine.UpdateRecognizerSetting进行设置.我不知道此设置的确切名称,但是this outdated documentation指出它是“ CFGConfidenceRejectionThreshold”.

祝好运！

标签：speech-recognition,visual-studio-2017,c
来源： https://codeday.me/bug/20191108/2009812.html