Speech to Text Conversion

Speech to Text Conversion using asp.net and C#

Hi I have created a basic Speech to text conversion window form.

For this we need to first download the sapi(Speech Software Development Kit). One site for downloading is http://www.microsoft.com/download/en/details.aspx?id=10121 

Incase using visual studio 2005 also download System.Speech.Recognition dll from the net.

Once you have downloaded the dll, go to http://msdn.microsoft.com/en-us/library/system.speech.recognition.aspx to understand then System.Speech.Recognition Namespace

Otherwise in google just type sapi download. Add this to your project and then the code as follows :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using SpeechLib;
using System.Speech.Recognition;
using System.Globalization;
using System.Threading;
using System.Diagnostics;

namespace SpeechToText

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

           

            SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine();

            Grammar dictationGrammar = new DictationGrammar();

            recognizer.LoadGrammar(dictationGrammar);

           

           

            try

            {

                button1.Text = "Speak Now";

                recognizer.SetInputToDefaultAudioDevice();               

                RecognitionResult result = recognizer.Recognize();

                string output = result.Text;

                TextBox1.Text = output;

                button1.Text = "Speak";

            }

            catch (InvalidOperationException exception)

            {

                TextBox1.Text = String.Format("Could not recognize input from default aduio device. Is a microphone or sound card available?\r\n{0} - {1}.", exception.Source, exception.Message);

            }

            finally

            {

                recognizer.UnloadAllGrammars();

            }            

        }

    }

}