8. The method of claim 1 , wherein identifying the second quantity of projections based on non-speech meta-data further comprises estimating a unigram model to generate a unigram clustering output.
8. The method of claim 1 , wherein identifying the second quantity of projections based on non-speech meta-data further comprises estimating a unigram model to generate a unigram clustering output. 9. The method of claim 8 , wherein the unigram clustering output is used for building a higher order tree.