9. The speech recognition apparatus according to claim 1 wherein the segment relation value calculating unit calculates the segment relation value indicating a relative feature of the target segment with respect to one or more adjacent segments based on plural vectors which are base vectors that correspond to the target segment and one or more adjacent segments, and whose lengths indicate durations of respective unit segments.
9. The speech recognition apparatus according to claim 1 wherein the segment relation value calculating unit calculates the segment relation value indicating a relative feature of the target segment with respect to one or more adjacent segments based on plural vectors which are base vectors that correspond to the target segment and one or more adjacent segments, and whose lengths indicate durations of respective unit segments. 10. The speech recognition apparatus according to claim 9 , wherein the segment relation value calculating unit calculates the segment relation value which is a value concerning an angle formed by an added vector obtained as a sum of the plural vectors and a predetermined reference vector.