7. A text data processing method comprising: dividing, by a processor, text obtained as a result of speech recognition process into a plurality of blocks by a unit of a topic; calculating, by the processor, a frequency of symbol insertion in a block based on an appearance frequency of a symbol included in the block and number of words or characters in the block, the block being input from a result of the division; determining, by the processor, whether symbol edit for each block is necessary or not based on the frequency of symbol insertion in each block, each block being input from a result of the dividing of the text; and calculating, by the processor, likelihood of the symbol edit based on likelihood of symbol insertion for a word and a record of symbol insertion in a block including symbol already inserted and calculating a symbol edit position in the block in accordance with the likelihood of symbol edit when determining that the symbol edit is necessary.
7. A text data processing method comprising: dividing, by a processor, text obtained as a result of speech recognition process into a plurality of blocks by a unit of a topic; calculating, by the processor, a frequency of symbol insertion in a block based on an appearance frequency of a symbol included in the block and number of words or characters in the block, the block being input from a result of the division; determining, by the processor, whether symbol edit for each block is necessary or not based on the frequency of symbol insertion in each block, each block being input from a result of the dividing of the text; and calculating, by the processor, likelihood of the symbol edit based on likelihood of symbol insertion for a word and a record of symbol insertion in a block including symbol already inserted and calculating a symbol edit position in the block in accordance with the likelihood of symbol edit when determining that the symbol edit is necessary. 8. The text data processing method according to claim 7 , wherein the record of symbol insertion is set, by the processor, in accordance with an insertion frequency of the symbol in the block obtained by dividing text from a same speaker.