基于MATLAB实现语音信号储存空间的简化  

Simplification of voice signal storage space based on MATLAB

作　　者：邓克琦 DENG Keqi(Academy of Physics,Nanjing University,Nanjing 210093,China)

机构地区：[1]南京大学物理学院

出　　处：《电声技术》2019年第10期8-10,共3页Audio Engineering

摘　　要：为了提高语音传输和储存时的效率,又考虑到语音信号的频谱主要分布在频域图谱的两端,而中间大部分的区域空白,因此本文提出一种简化方法,可以舍去这些空白部分,节省储存空间,提高效率。首先将输入信号转换到频域,舍去能量过低的空白部分,将频域收拢,输出时,将频域信号通过逆傅里叶变换转换为时域信号,再改变采样率输出模拟信号即可输出原语音模拟信号。In order to improve the efficiency of voice transmission and storage,it is considered that the spectrum of the speech signal is mainly distributed at both ends of the frequency domain spectrum,and most of the middle area is blank.Therefore,a simplified method is proposed in this article,in which these blank parts can be discarded.Save storage space and increase efficiency.First,the input signal is converted to the frequency domain and discard the blank portion whose energy is too low,and fold the frequency domain.When outputting,the frequency domain signal is converted into a time domain signal by inverse Fourier transform,and then the original analog signal is output by changing the sampling rate to output an analog signal.

关 键 词：MATALB 语音信号 傅里叶变换 

分 类 号：TN912.3[电子电信—通信与信息系统]