19. An apparatus for training a prosody statistic model with a raw corpus that includes a plurality of sentences with punctuation, comprising: a tokenization unit configured to transform said plurality of sentences in said raw corpus into a plurality of token sequences respectively; a counter configured to count frequency of each adjacent token pair occurring in said plurality of token sequences and frequency of punctuation that represents a pause occurring at associated positions of said each token pair; a pause probability calculator configured to calculate pause probabilities at said associated positions of said each token pair, based on the frequency of each adjacent token pair and the frequency of punctuation; and a prosody statistic model constructor configured to construct said prosody statistic model based on said token pairs and said pause probabilities at associated positions thereof.
19. An apparatus for training a prosody statistic model with a raw corpus that includes a plurality of sentences with punctuation, comprising: a tokenization unit configured to transform said plurality of sentences in said raw corpus into a plurality of token sequences respectively; a counter configured to count frequency of each adjacent token pair occurring in said plurality of token sequences and frequency of punctuation that represents a pause occurring at associated positions of said each token pair; a pause probability calculator configured to calculate pause probabilities at said associated positions of said each token pair, based on the frequency of each adjacent token pair and the frequency of punctuation; and a prosody statistic model constructor configured to construct said prosody statistic model based on said token pairs and said pause probabilities at associated positions thereof. 25. The apparatus for training a prosody statistic model according to claim 19 , further comprising: a smoothing unit configured to perform smoothing process on said calculated pause probabilities.