7. A speech-to-text method comprising: performing speech recognition of speech data and outputting a recognition result sub-word string as a sub-word string including time information based on a playback time of the speech data; creating edit result text which is text information written-out from the speech data; converting the edit result text into an edit result sub-word string; and adding the time information to an edited part in the edit result text by collating the edit result sub-word string with the recognition result sub-word string to which the time information has been added according to consistency of sub-words to thereby match the edit result text and the speech data.
10. The speech-to-text method, according to claim 7 , comprising: playing back the speech data; and synchronizing an edit cursor position with speech playback time by referring to correspondence between the edit result text and the speech data.