Sound file to speech transcript library?
I've not given much thought to this before really, but has anyone come across a library or program that can take a sound file (say an MP3) and extract all the speech (a sort of transcription). Whether it is grammatically correct or anything like that I don't care, I just want it to list all of the words used so I can search through them later.
The reason I'm asking is when I go to uni I would like to record all of the lectures etc and store them in a database, and later in the year to be able to search through all the recordings for information on a particular subject.
Any information/resources/links would be great! If I can't find a library (C++, COM, .NET, any) I'll attempt to write something myself.
Thanks, and if I can throw something together I'll definately give it to anyone thats interested.