26. A non-transitory computer-readable recording media according to claim 18 that further causes the computer to function as: a voice recognition unit that performs voice recognition to input voice and outputs a voice recognized result; and a word sequence information generation unit that generates the word sequence to insert the symbol in from the voice recognized result output from the voice recognition unit.
18. A non-transitory computer-readable recording media recording a program for causing a computer to function as a symbol insertion apparatus for inserting a symbol in a word sequence transcribing voice information comprising: a symbol insertion likelihood calculation unit that obtains a symbol insertion likelihood of the word sequence for each of a plurality of symbol insertion models, the plurality of symbol insertion models being supplied for the word sequence to insert the symbol in for each speaking style feature; a speaking style feature similarity calculation unit that obtains a similarity between the speaking style feature of the word sequence and a plurality of speaking style feature models; and a symbol insertion evaluation unit that weights the symbol insertion likelihood obtained for the word sequence for each of the plurality of symbol insertion models according to the similarly between the speaking style feature of the word sequence and the plurality of speaking style feature models and a relevance between the symbol insertion model and the speaking style feature model, and perform symbol insertion evaluation to the word sequence.