6. The apparatus of claim 5 , wherein the processor is further configured to generate the acoustic model by further training the acoustic model using a set of second non-temporally contiguous speech frames, extracted by the processor from the temporally contiguous speech frames of the training data, the set of first non-temporally contiguous speech frames having one or more different speech frames from the set of second non-temporally contiguous speech frames.
5. The apparatus of claim 4 , wherein the processor is further configured to generate the acoustic model by training the acoustic model using a set of first non-temporally contiguous speech frames, extracted by the processor from temporally contiguous speech frames of training data.