10. The computer-readable storage medium of claim 5 , wherein generating a speech-based phonetic sequence of phonetic units comprises: generating a plurality of possible phonetic sequences of phonetic units; using at least one model to generate a probability score for each possible phonetic sequence; and selecting the possible phonetic sequence with the highest score as the speech-based phonetic sequence of phonetic units.
10. The computer-readable storage medium of claim 5 , wherein generating a speech-based phonetic sequence of phonetic units comprises: generating a plurality of possible phonetic sequences of phonetic units; using at least one model to generate a probability score for each possible phonetic sequence; and selecting the possible phonetic sequence with the highest score as the speech-based phonetic sequence of phonetic units. 11. The computer-readable storage medium of claim 10 , wherein using at least one model comprises using an acoustic model and a language model.