How to convert voice to text?

I am trying to converting my开发者_StackOverflow社区 wav file to text file using sphinx4. Is it possible to recognize the word which is not include in grammar file?

This is a common misconception that you should exactly work without any grammar to be able to recognize speech efficiently and solve the application task. Instead, it's practical to use some solution to the problem which will work and decode you files.

If you are not sure about the domain or the language you can always use a very generic language model assisted with syllable-based grammar to decode unknown words. It's often common to use web queries after that to turn syllable-based variants into words thus allowing system to aquire vocabulary. That will allow you to get a good result for very generic types of speech.

Sphinx-4 supports that.