6. The method of claim 5 , wherein, for a given pair of participants in the conversation over the two channels, said sorting step merges the transcriptions for the given pair from the two channels by sorting the words in each of the transcriptions corresponding to the given pair according to the time index.
6. The method of claim 5 , wherein, for a given pair of participants in the conversation over the two channels, said sorting step merges the transcriptions for the given pair from the two channels by sorting the words in each of the transcriptions corresponding to the given pair according to the time index. 7. The method of claim 6 , wherein said training step trains the language model using the merged transcriptions.