1. A method of improving speech recognition comprising: taking a realization and a first representation for said realization; performing a speech recognition on said realization thereby producing a second representation for said realization; aligning said first representation and said second representation; selecting single words from said first representation and corresponding aligned single words from said second representation and pairing said aligned single words, wherein said first and said second representations are different; and updating a word database using said selected paired words together with said corresponding aligned realization.