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目前,出现了许多新的语音压缩编码技术,其中多脉冲线性预测编码由于考虑了人耳的听觉效应,利用谱逼近准则寻优,获得了良好的语声编码听音效果,因而在中速率语声编码方法中颇受人们重视。本文对多脉冲编码方案提出了几种新的改进方法:去帧间影响效应、残差的峰值逼近多脉冲的方法,线性预测参数的二次寻优、二级多脉冲激励模型法,文献中自相关法公式的修正等。最后给出了实验结果。
At present, there are many new speech compression coding techniques, in which multi-pulse linear predictive coding has good speech coding performance due to considering the auditory effect of the human ear and using the spectral approximation criterion, so that in the middle rate language Acoustic coding method quite popular. In this paper, several new improved methods are proposed for multi-pulse coding schemes: the effect of removing to the interframe, the method of peak approximation of multiple residuals, the second order optimization of linear prediction parameters, the second-order multi-pulse excitation model method, Correction of auto-correlation formula and so on. Finally, the experimental results are given.