1. A preference extracting apparatus comprising: a display that displays video programs; a text information obtaining section that obtains text information that accompanies video content of a scene being currently displayed, said text information having strings of text; a morpheme analyzer for producing morphemes from said text information and successively supplying each morpheme to be analyzed for keywords; a keyword extracting section that extracts from the morphemes keywords associated with the scene being displayed for measuring user's preference based on the morphemes; a presenting section that causes said display to display to the user a display indication representing that the keywords associated with the displayed scene have been extracted; a preference value defining section that defines a preference value of the user to the scene being displayed in accordance with a response by the user to the display indication and indicating the degree of preference by the user to the extracted keywords associated with said displayed scene such that the preference value of the user is increased or decreased as a function of the user's response; and a storage section that establishes correspondence between each keyword and its associated preference value and stores an initial preference value of an extracted keyword to which said user has not yet responded, and said storage section storing the preference values of said keywords to which said user has responded as the user's preference information in predetermined storage means.
1. A preference extracting apparatus comprising: a display that displays video programs; a text information obtaining section that obtains text information that accompanies video content of a scene being currently displayed, said text information having strings of text; a morpheme analyzer for producing morphemes from said text information and successively supplying each morpheme to be analyzed for keywords; a keyword extracting section that extracts from the morphemes keywords associated with the scene being displayed for measuring user's preference based on the morphemes; a presenting section that causes said display to display to the user a display indication representing that the keywords associated with the displayed scene have been extracted; a preference value defining section that defines a preference value of the user to the scene being displayed in accordance with a response by the user to the display indication and indicating the degree of preference by the user to the extracted keywords associated with said displayed scene such that the preference value of the user is increased or decreased as a function of the user's response; and a storage section that establishes correspondence between each keyword and its associated preference value and stores an initial preference value of an extracted keyword to which said user has not yet responded, and said storage section storing the preference values of said keywords to which said user has responded as the user's preference information in predetermined storage means. 7. The preference extracting apparatus according to claim 1 , wherein the preference value defining section has: a sound collecting section that collects surrounding voice; and a voice recognizing section that recognizes voice given by the user based on the sound collection result by the sound collecting section; and defines the preference value in accordance with the voice of the user, which is recognized by the voice recognizing section.