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I'm wondering how
<input type="text" x-webkit-speech speech />
Is there a speech recognition enging built into Chrome or is it accessing an underlying speech recognition facility in the operating system?
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I just confirmed this on my Chrome Cr-48, it works.
There is also a working group that produced http://www.w3.org/TR/xhtml+voice/ but I don't believe this is implemented in any browser except Opera.
They are using their own API for speech recognition. Ex: sending a post request to there servers.
Speech recognition is a proposal by Google. https://docs.google.com/View?id=dcfg79pz_5dhnp23f5
The feature ships with Chrome 8+ and it looks like it sends the data to google servers to perform the actual recognition.
This feature now works on chrome 11 beta.
check this out..
http://slides.html5rocks.com/#speech-input
This might be of interest https://github.com/taf2/speech2text ruby bindings for the google speech to text API