2. The speech recognition apparatus according to claim 1, wherein said changing means changes classes of recognition information to be used for the speech recognition in accordance with the viewpoint detected by said detecting means.
2. The speech recognition apparatus according to claim 1, wherein said changing means changes classes of recognition information to be used for the speech recognition in accordance with the viewpoint detected by said detecting means. 3. The speech recognition apparatus according to claim 2, wherein said changing means sets a plurality of areas each of which is related to a different class of the recognition information, selects one of the plurality of areas in accordance with the viewpoint detected by said detecting means, and determines a class of the recognition information, related to the selected area, to be used in the speech recognition.