Based on symbol dynamics in 1-d piecewise linear mapping chaotic systems, an arithmetic method processing chaotic signals is studied in the paper, including addition, subtraction and multiplication.
基于1 - D分段线性映射函数构造的混沌系统符号动力学，该文研究了一种能直接对混沌符号序列进行加、减及乘法运算的方法。
An improved non-linear spectral subtraction algorithm is also put forward. The application range of the spectral subtraction is expanded by the new noise estimation method.
算法提高了谱减法的适用范围，还在一般谱相减方法的基础上提出了改进的谱相减算法。
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