神经网络与DTW两种识别方法的比较

Comparison of Neural Network and Dynamic Time Warping Recognition Algorithms

  • 摘要: 在非特定人小字表场合下,比较了人工神经网络方法(ANN),动态规划方法(DTW)以及直接比较方法(DC).对汉语10个孤立数字测试结果表明:用多遍样本进行训练时,训练时间ANN至少是DTW的100倍,DTW是DC的5倍以上;识别速度ANN比DC快300倍,DC比DTW快5倍;存储量ANN比DTW和DC需要的都少;识别率ANN比DTW高2.3%,DTW比DC高6.7%;用单遍样本训练时,DTW比DC高3.6%,DC比ANN高8.1%.说明在小字表情况下ANN的总体性能优于DTW,DTW优于DC。

     

    Abstract: The artificial neural network (ANN), the dynamic time warping (DTW) andthe direct comparison (DC) speech recognition algorithms are compared for the task of speaker-independent syllable recognitions. For the 10 isolated Chinese digits, the experimental results show that when multiple sets of samples were used for training, the training time required for ANN is at least 100 times of that for DTW, and the time for DTW is 5 times of that for DC; the recognition speed of ANN is 300 times more than that of DC, and the speed of DC is 5 times more than that of DTW; the memory required for ANN is less than that for DTW or DC; the correct recognition rate of ANN is 2.3% higher than that of DTW; and the rate of DTW is 6.7% higher than that of DC. The results also indicate that when a single set of samples is used, the recognition rate of DTW is 3.6% higher than that of DC, and the rate of DC is 8.1% higher than that of ANN. It can be concluded that in the case of a small size vocabulary, the overall performance of ANN is superior to that of DTW, and the overall performance of DTW is superior to that of DC.

     

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