C# 语音识别

Question

There is a post in here about that...but it doesn't work for me. I have added a system.speech.dll that I found in the internet but i cannot use System.speech, because it doesn't appear.

Error 1 The type or namespace name 'SpeechRecognizer' could not be found (are you missing a using directive or an assembly reference?)

Error 2 The type or namespace name 'SpeechRecognizedEventArgs' could not be found (are you missing a using directive or an assembly reference?)

I have used this code. I am using Windows Vista 64

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using SpeechLib;
using System.Threading;


namespace WindowsFormsApplication13
{
    public partial class Form1 : Form
    {

        SpeechRecognizer rec = new SpeechRecognizer();

        public Form1()
        {
            InitializeComponent();
            rec.SpeechRecognized += rec_SpeechRecognized;
        }

        void rec_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            lblLetter.Text = e.Result.Text;
        }


        private void Form1_Load(object sender, EventArgs e)
        {
            var c = new Choices();

            // Doens't work must use English words to add to Choices and
            // populate grammar.
            //
            //for (var i = 0; i <= 100; i++)
            //  c.Add(i.ToString());

            c.Add("one");
            c.Add("two");
            c.Add("three");
            c.Add("four");
            c.Add("Five");
            c.Add("six");
            c.Add("seven");
            c.Add("eight");
            c.Add("nine");
            c.Add("ten");

            // etc...

            var gb = new GrammarBuilder(c);
            var g = new Grammar(gb);
            rec.LoadGrammar(g);
            rec.Enabled = true;
        }
    }
}

Answer 1

1) You need to add a reference to System.Speech in your project

2) You shouldn't have had to find 'System.Speech.dll' on the Internet, it should be in.Net 3 (or 3.5, but get 3.5 anyway unless you've a compelling reason not to)

Edit:

You might want to look here:

http://dotnet.org.za/beta/archive/2008/01/06/system-speech-recognition.aspx

Answer 2

I agree with James Ogden. Also, you should add a "using" statement:

using System.Speech.Recognition

Or, fully qualify your class names.

Answer 3

Check that you have a language engine matching the language you have configured in Vista. See http://support.microsoft.com/kb/934377

Answer 4

Im having problem about SpeechRecognizer class on Windows XP. sometimes it works but sometimes it doesnot work, and need to restart pc. on windows 7 its working fine. I think its some problem in speech engine itself, cause when I run my application several times it stops working.

Im using this code:

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using SpeechLib; using System.Threading;

namespace WindowsFormsApplication13 { public partial class Form1: Form {

    SpeechRecognizer rec = new SpeechRecognizer();

    public Form1()
    {
        InitializeComponent();
        rec.SpeechRecognized += rec_SpeechRecognized;
    }

    void rec_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {
        lblLetter.Text = e.Result.Text;
    }


    private void Form1_Load(object sender, EventArgs e)
    {
        var c = new Choices();


        c.Add("one");
        c.Add("two");
        c.Add("three");
        c.Add("four");
        c.Add("Five");
        c.Add("six");
        c.Add("seven");
        c.Add("eight");
        c.Add("nine");
        c.Add("ten");

        // etc...

        var gb = new GrammarBuilder(c);
        var g = new Grammar(gb);
        rec.LoadGrammar(g);
        rec.Enabled = true;
    }
}

}

Answer 5

While not directly applicable to the above question - it is worth noting that the Speech SDK will not nessecarily be availible on each clients machines. While Vista includes a speech recognizer, XP does not. A possible way to correct this is to get the XP users to install the Speech SDK, which includes one. The other is to add Office 2003 (not 2007) as a dependency.