10. The computer-readable storage device of claim 9 , wherein the index of words is generated based on a plurality of training phoneme lattices and factors of interest from valid entries in a database, wherein the factors of interest comprise trigrams.
10. The computer-readable storage device of claim 9 , wherein the index of words is generated based on a plurality of training phoneme lattices and factors of interest from valid entries in a database, wherein the factors of interest comprise trigrams. 11. The computer-readable storage device of claim 10 , wherein the factors of interest further comprise N-grams based on the valid entries in the database.