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cis's Introduction

cis lg本科修的是通信工程,其实更多的知识是涉及到了数字信号处理方面的知识。2016年参加了“全国大学生挑战杯”大赛,在老师的指导下做了一个项目叫做----“将人工耳蜗的言语处理功能移植移动设备上的探索与研究”。lg负责的是核心部分,也就是数字信号处理算法的处理.算法的核心是“连续间隔采样算法”,也叫做CIS.我用java实现了整个算法。希望可以帮助到有需要的人。

本发明所需解决的技术问题有: 1)将言语处理器的言语处理功能移植到移动设备上,更好的发挥移动设备越来越强大的运算能力,大幅提升语音信号的处理能力; 2)受限于蓝牙传输的速度,尽可能的减少信号的延迟; 3)信号处理、翻译、重复播放等功能模块的开发 CIS模块(核心):连续间隔采样策略(continuous interleaved sampling) 1)先对语音信号进行预加重处理 预加重采用的是一阶高通滤波器:y(n)=x(n)-a*x(n-1),式中,a的取值在0.9~0.98之间,实际采用的值是0.95 2)将预加重后的信号经过6阶带通滤波器 在实际中,一共设置了八组6阶带通滤波器。关键是通过大量的实验来得到带通滤波器的参数。 3)将经过带通滤波器处理后的信号输入整流/低通滤波器进行处理. 实际项目中采用的是4阶低通滤波器 4)最后将低通滤波器处理后的信号经过压缩处理 一般语音的音频幅度远远大于电子耳蜗植入病人可以接收的动态范围。因此音频信号幅度的压缩是CIS处理器必不可少的一步。实际项目中采用的是对数压缩的方法。

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