This paper studies two kinds of methods for pitch predictor in speech compressing coding, i.e., open-loop and closed-loop structures. Some of simplified approaches for solving pitch predictor equation are suggested, a...This paper studies two kinds of methods for pitch predictor in speech compressing coding, i.e., open-loop and closed-loop structures. Some of simplified approaches for solving pitch predictor equation are suggested, and the performances are compared under several conditions. The computer simulation results are shown.展开更多
文摘This paper studies two kinds of methods for pitch predictor in speech compressing coding, i.e., open-loop and closed-loop structures. Some of simplified approaches for solving pitch predictor equation are suggested, and the performances are compared under several conditions. The computer simulation results are shown.
文摘本文是笔者所开发的语音信号处理课程中的一个研究型实验教学案例。文中概述了多脉冲激励线性预测声器的编码方法,并用M ATLAB做了仿真实现。在本声码器实现方法中,在发送端对系统参数进行量化时,用量化LPC滤波器的PARCOR系数(部分相关系数,PAR t COR relation)代替传统的对滤波器的线性预测系数的量化;在接收端,将PARCOR系数用文中所给的算法转换为线性滤波器的线性预测系数,进行系统重构合成语音,大大降低了传输比特率,并且提高了合成语音质量。