基于第二类切比雪夫多项式的语音线性谱对参数的计算

The Computation of Line Spectral Frequency Using the Second Chebyshev Polynomials

对线性谱对 (LSP)参数的计算方法提出改进算法 ,该算法利用第二类切比雪夫多项式的迭代性质对初始函数降阶。理论分析表明 ,改进算法可以获得更简洁的数学表达式。实验结果显示 ,改进算法中基本消除了乘法运算 ,同时随着线性预测分析阶数的增加可以进一步降低算法复杂度。

A new version of the algorithm for computing line spectral frequency coefficients is presented. This new version uses the second Chebyshev polynomials to reduce the function order. Theoretical research indicates that the improved algorithm can lead to more concise expressions, eliminate multiplication and reduce the complexity of computation further when linear prediction order increases.