13. A machine readable storage having stored thereon a computer program having a plurality of code sections comprising: code for identifying unigrams that are individually meaningless from a set of training data; code for assigning at least a portion of the unigrams identified as being meaningless to a first n-gram class selected from a plurality of n-gram classes; and code for processing the classified training data to generate at least one statistical model.
13. A machine readable storage having stored thereon a computer program having a plurality of code sections comprising: code for identifying unigrams that are individually meaningless from a set of training data; code for assigning at least a portion of the unigrams identified as being meaningless to a first n-gram class selected from a plurality of n-gram classes; and code for processing the classified training data to generate at least one statistical model. 16. The machine readable storage of claim 13 , further comprising: code for identifying bigrams that are entirely composed of meaningless unigrams; code for determining whether the identified bigrams are individually meaningless; and code for assigning at least a portion of the bigrams identified as being individually meaningless to the first n-gram class.