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针对传统的基音同步叠加方法的缺陷提出了相应的改进方法：一是将小波变换用于声门闭合时刻（ＧＣＩ）的检测，获得ＧＣＩ的准确位置，在此基础上，按每个基音周期起始的精确位置进行基音同步叠加，在一定的范围内，改变单音节的基频和时长去拟合连续语流中音节的超音段变化；二是用升余弦滚降窗函数代替基音同步叠加算法中的Ｈａｍｍｉｎｇ窗函数，使合成语音的质量明显提高，调节更加方便．
Aiming at the defect of the traditional pitch synchronization superposition method, the corresponding improvement methods are put forward. One is that the wavelet transform is used to detect the glottal closure moment (GCI), and the exact position of the GCI is obtained. On this basis, The exact location of the beginning of the synchronization of pitch synchronization, within a certain range, changing the pitch and duration of monosyllabic syllables to fit continuous syllables supersonic changes; the second is to use raised cosine roll-off window function instead of pitch synchronization superimposed The Hamming window function in the algorithm can obviously improve the quality of synthesized speech and make adjustment more convenient.