We are working on an asp.net web application that requires some data to be entered by speech.
The user can enter some data using normal user interface however, we wa
You can leave this idea. It is not possible to recognize arbitrary values from arbitrary people. There are some more or less successful projects (like Google Voice Search) but they are proprietary, closed and not for sale. The cost to create such system will be estimated in millions of dollars.
You might be able to use Dragon Naturally speaking for this, they have an SDK and an internet explorer plugin.
http://www.nuance.com/naturallyspeaking/pdf/ds_DNS10_SDK_Client.pdf
http://ct.scansoft.com/customerfiles/kbasefiles/3067/wp_DNS_HTML.pdf
I think its designed primarily for traversing the web pages but if there is an option to handle custom voice commands then I dont see why you could not fill a text box with the command name for example.
might not be able to provide what you need but certainly worth checking out if you have not already
Please read: Whatever Happened to Voice Recognition?
Its not possible as of now unless you are doing an academic project.
Yes, it can be done:
An example:
http://weblogs.asp.net/ricardoperes/speech-recognition-in-asp-net