摘要
根据煤矿井下语音环境高噪声的特点,提出了一种在井下语音通信终端加入小波阈值降噪模块的方法。该方法改进了小波软、硬阈值降噪法,构造新的改进阈值函数,通过变量在软、硬阈值函数之间变动,降低了软、硬阈值函数降噪带来的负面影响。理论分析结果表明,引入小波阈值降噪可以显著提高语音通话效果,改善了煤矿井下语音通信系统的质量。
According to characteristics of high-noise environment in underground coal mine,the paper put forward a new method which adds a wavelet threshold noise reduction module to voice communication terminals.The method improves soft and hard threshold of wavelet threshold noise reduction method,and constructs a new threshold function.The new function varies through a variable between soft and hard wavelet threshold function,so as to reduce the negative impact.The theoretical analysis results show that the application of wavelet threshold noise reduction can significantly improve quality of phone call and coal mine voice communication system.
出处
《工矿自动化》
北大核心
2014年第1期50-54,共5页
Journal Of Mine Automation
基金
国家高技术研究发展计划(863计划)主题项目(2012AA062103)
江苏省科技创新与成果转化专项引导资金项目(BY2012081)
关键词
煤矿通信
语音通信
噪声
阈值降噪
小波变换
coal mine communication
voice communication
noise
threshold noise reduction
wavelet transform
