Abstract
Dynamic Time Warping(DTW)is one of the important distance measures in similarity searching of time series;however,the exact calculation has become a bottleneck.An approach named EA_DTW was proposed.The method checked if value of the cell in cumulative distance matrix exceeded the threshold and if so,it would terminate the calculation of other related cells.The theoretical analysis on the process of EA_DTW was made.The empirical experimental results show that EA_DTW outperforms the dynamic DTW calculation in terms of calculation time,and is much better when the threshold is below the real DTW distance.
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