4. The computer readable recording medium according to claim 1 , wherein the determining compares both a character recognition result acquired from images of video data and that acquired from speeches of the video data with the search word for determination.
5. The computer readable recording medium according to claim 4 , wherein the registering the search word as meta-information registers the search word as meta-information of the video data if both the character recognition result acquired from images and that acquired from speeches match the search word and both character recognition results matching the search word are within a predetermined time.