what's the fundamental's of a speech to text application with c#?

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hi to everybody,
excuse me because of the language,
i want to develop an application that can recognize the speech(no matter who is speaking)and converts it to text BUT not in English! → in Persian,
I'll appreciate it a lot.

best WISHES & Best dreams

Posted 17-Jan-12 3:00am

The_Leader

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Richard MacCutchan · Accepted Answer · 2012-01-17T05:44:00

Solution 1

Take a look at the Speech API[^] library; there may also already be a support library for Persian language.

Posted 17-Jan-12 5:44am

Richard MacCutchan

Comments

Sergey Alexandrovich Kryukov 17-Jan-12 11:58am

This is more complete and advanced way to get access to the technology compared to .NET System.Speech which comes with .NET.
Unfortunately, full SAPI is not for .NET. Nevertheless, good to know, I voted 5.

As to the recognition, it basically works in .NET with available System.Speech, but I'm not sure it Persian engine is available or not. Hopefully OP will find it out using my answer, please see.
--SA

thatraja 17-Jan-12 13:09pm

5!

Richard MacCutchan 15-May-12 13:07pm

What sort of ideas? I have given you a link to the API so it's up to you to learn how to use it.

Sergey Alexandrovich Kryukov · Accepted Answer · 2012-01-17T05:53:00

Solution 2

According to this, speech recognition engines in different languages should be included in language packs: http://msdn.microsoft.com/en-us/goglobal/ee461121#Languagepacksandextentoflocalization[^].

See more on language packs: http://windows.microsoft.com/en-US/windows7/install-or-change-a-display-language[^].

You can freely download a Persian language pack from here: http://windows.microsoft.com/en-US/windows/downloads/languages[^].

So, first try to find out from the pages referenced above if you can get a language pack with speech recognition engine in Persian. For the development itself, you should add the reference to the assembly System.Speech (always bundled with .NET Framework redistributable package) and use System.Speech.Recognition, see http://msdn.microsoft.com/en-us/library/system.speech.recognition.aspx[^].

I personally used it, but only in English. It would be great if you do some development in Persian and share your experience in case of success, especially if you face some difficulties in installation or development and resolve the problems. In this case, you could publish CodeProject article or shorter Tips & Tricks article. The CodeProject members ask the question likes yours from time to time, so sharing such experience would be quite useful.

Good luck and best wishes to you,

—SA

Posted 17-Jan-12 5:53am

Sergey Alexandrovich Kryukov

Updated 17-Jan-12 7:14am

v5

Comments

Richard MacCutchan 17-Jan-12 12:43pm

Obviously a 5 for this. My mistake missing the C# tag :(

Sergey Alexandrovich Kryukov 17-Jan-12 12:46pm

Thank you, Richard.
It wasn't a problem as your information is something which is good to know anyway.
--SA

thatraja 17-Jan-12 13:08pm

Big 5!

Sergey Alexandrovich Kryukov 17-Jan-12 13:10pm

Thank you, Raja.
--SA

Amir Mahfoozi 18-Jan-12 0:07am

+5

Sergey Alexandrovich Kryukov 18-Jan-12 1:00am

Thank you, Amir.
--SA

The_Leader 18-Jan-12 3:02am

+5 & +5 & +5 & . . .
Thanks MASTER.

Sergey Alexandrovich Kryukov 18-Jan-12 3:40am

Thank you. I hope it will work for you, would be interesting to know it you will be able to put it in your project and tell us about it; speech recognition in different languages is very, very interesting thing, may be now this is only the very beginning of it.

Best wishes,
--SA

Sergey Alexandrovich Kryukov 17-May-12 16:48pm

You should see the difference between interpretation of voice command -- it works pretty well and speech-to-text, so called "dictation". In first case, you can use limited grammar. In second case, the system should have a grammar corresponding to a more or less comprehensive dictionary of some language. In System.Speech.Recognition, this is called dictation grammar. I never saw anything working well. Some say, Dragon Dictage from Nuance works well; I never tried.
--SA

Sergey Alexandrovich Kryukov 28-May-12 16:51pm

This is because you use dictation grammar. The fidelity of recognition with such a big grammar is too poor. I don't think you can do much about it, except waiting for further progress in the engine... Sorry, too bad.
--SA