7. The speech recognition apparatus according to claim 6 , wherein the segment relation value calculating unit calculates a ratio of the duration of the target segment to the duration of the adjacent segment as the segment relation value.
6. The speech recognition apparatus according to claim 1 , wherein the segment information acquiring unit acquires segment information indicating respective durations of plural unit segments, and the segment relation value calculating unit calculates the segment relation value of the target segment based on the duration of the target segment and the duration of the adjacent segment.