一种适用于直升机强旋翼噪声环境的话音处理系统研究与实现  

Research and implementation of a voice processing system suitable for strong rotor noise environment of helicopter

作　　者：李声飞[1] LI Shengfei(The Tenth Research Institute of China Electronic Technology Group Corporation,Chengdu 610000,China)

机构地区：[1]中国电子科技集团公司第十研究所,四川成都610000

出　　处：《现代电子技术》2019年第10期124-127,131,共5页Modern Electronics Technique

基　　金：国家安全重大基础研究项目(编号不公开)~~

摘　　要：为了解决直升机平台强旋翼噪声对飞行员通话干扰问题,设计一种基于Xilinx ZYNQ~?-7000平台的话音处理系统。该系统由模拟音频处理单元和数字音频处理单元组成,模拟音频单元完成飞行员模拟话音信号的匹配、滤波、预处理和A/D变换,数字音频处理单元利用ZYNQ平台强大的综合处理能力,完成数字话音信号的协议解析和混音控制,并针对直升机舱内噪音的特点,设计一套适用于直升机强噪声平台的话音处理算法。最后通过外场飞行试验表明,该系统能够有效抑制直升机驾驶舱内通话噪声,增强语音信号,提高飞行员通话的可听可懂度和舒适度。A voice processing system based on the Xilinx ZYNQ?-7000 platform is designed to solve the interference problem of the helicopter platform′s strong rotor noises to pilots' voices.The system is composed of the analog audio processing unit and digital audio processing unit.The analog audio processing unit is used to complete the matching,filtering,preprocessing and AD transformation of analog voice signals of the pilot.The digital audio processing unit is used to complete the protocol analysis and mixed voice control of the digital voice signals in virtue of the strong and comprehensive processing ability of the ZYNQ platform.In allusion to the characteristics of the cabin noises in helicopter,an audio processing algorithm suitable for the strong noise platform of the helicopter is designed.The results of the outfield flight test show that the system can effectively suppress the voice noises in the cockpit of helicopter,enhance voice signals,and improve the intelligibility and comfortability of pilots' voices.

关 键 词：直升机 强旋翼噪声 话音处理系统 数字话音信号 ZYNQ平台 噪声抑制 

分 类 号：TN914-34[电子电信—通信与信息系统]