Improved algorithm of DTW in speech recognition

This paper improves the Dynamic Time Warping (DTW) algorithm. In order to change the problem of the traditional search range of DTW speech recognition algorithm is too large, an improved DTW algorithm is proposed to limit the search path. Firstly, the traditional algorithm is analyzed to find its speech recognition search path, distortion and recognition efficiency. Secondly, the improved algorithm is introduced, the search path is limited, and simulation is carried out in MATLAB. Compare the improvement results with the improved recognition results before comparing the distortion and recognition efficiency, and the improved efficiency is calculated. Experimental results show that the improved new speech recognition algorithm is superior to the traditional algorithm in overall performance.