Speech recognition is achieved using a normalized cumulative distance. A normalized Dynamic Programming (DP) value is calculated by dividing a cumulative path distance by an optimal integral path length. The path length is calculated iteratively by adding 2 if the warping path is diagonal...http://www.google.com.tw/patents/US5751898?utm_source=gb-gplus-share專利 US5751898 - Speech recognition method and apparatus for use therein
