Speech Recognition

Charith Liyanagamage

Hi Friends,,,

I want to know how can i develop a speech recognition app.
I have already done the opposite side which is converting text to speech.

simply what i want to develop is,

user speaks using the microphone.
then the application should track the "word" he says and output that word to a textbox.

after the application is loaded, it should automatically capture the word he says.
he doesn't need to click any button.

im using win XP and VS2008(.net 3.5)....C# language
if you could please give me a hand to do this asap.....

Charith

6 Replies

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Kirtan Patel16y ago
Accepted answer
friend ,It can also be done using SAPI it self

check "do you like this answer check box if it help you :)

private void btnListen_Click(object sender, EventArgs e)
        {

            // Speech Recognition Object

            SpSharedRecoContext listener;

            // Grammar object

            ISpeechRecoGrammar grammar;

            listener = new SpeechLib.SpSharedRecoContext();

            listener.Recognition += new _ISpeechRecoContextEvents_RecognitionEventHandler(listener_Reco);

            grammar = listener.CreateGrammar(0);

            grammar.DictationLoad("", SpeechLoadOption.SLOStatic);

            grammar.DictationSetState(SpeechRuleState.SGDSActive);

        }

        public void listener_Reco(int StreamNumber, object StreamPosition, SpeechRecognitionType RecognitionType, ISpeechRecoResult Result)

        {

            string heard = Result.PhraseInfo.GetText(0, -1, true);

            textBox1.Text += heard;

        }
Mahesh Chand16y ago
Just curious. Are you using any person names (such as Anna) in your TTS? I know these speech names are not same on 32-bit and 64-bit versions.
John Bartolucci16y ago
Folks, the above answer was working for me until I converted my project to run on x64 (any proc.).
Project compiles w/o error, but when I start the speech reco. event. it throws Exceptions and crashes.
Will it be possible to continue using SAPI 5.x w/o forcing my C# project back to 32-bit proc. only? I'm currently running VS2010 on a x64/Win7 machine.
Charith Liyanagamage16y ago
Hi Kirtan,

It works......I installed SDK 5.1. Now it's working. Thanks a lot......

:)

Charith
Mahesh Chand16y ago
Did you try this article:
Programming Speech in WPF - Speech Synthesis

It's in WPF. If you want to use Windows Forms, you can still use same SAPI.
Charith Liyanagamage16y ago
Hi Kirtan,

I cant find any key words like SpSharedRecoContext,ISpeechRecoGrammar,DictationLoad,DictationSetState.....etc in VS2008.
And also whatever the library class that u hv mentioned.(SpeechLib)

As class references I have inserted both using System.Speech.Synthesis; and using System.Speech.Recognition;

please fix this issue and send me the solution.

And please mention if i need to install some 3rd party tool for this. I'm using windows XP SP2 with visual Studio 2008 Team System

Thanks.....
Charith