21. The apparatus for training a prosody statistic model according to claim 20 , wherein said pause probability calculator is configured to calculate a pause probability before a token pair based on the frequency of said token pair and the frequency of punctuation representing a pause occurring before said token pair, to calculate a pause probability after said token pair based on the frequency of said token pair and the frequency of punctuation representing a pause occurring after said token pair, and to calculate a pause probability amid said token pair based on the frequency of said token pair and the frequency of punctuation representing a pause occurring amid said token pair.
24. The apparatus for training a prosody statistic model according to claim 21 , wherein said pause probability calculator is configured to calculate the pause probability amid said token pair Prob tpt with Prob tpt = Count tpt Count tt wherein Count tt represents the frequency of said token pair, Count tpt represents the frequency of punctuation representing a pause occurring amid said token pair.