基于TMS320DM642麦克风阵列声源定位系统  

The System of Sound Source Localization by Microphone Array Based on TMS320DM642

作　　者：李致金[1] 乔杰[1] 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《测控技术》2011年第1期35-38,共4页Measurement & Control Technology

基　　金：南京信息工程大学基金资助项目(20080326)

摘　　要：麦克风声源定位是利用麦克风阵列拾取语音信号,并用数字信号处理技术对其进行分析和处理的声源定位技术。在麦克风阵列声源定位中,语音信号端点的拾取是重要的环节。语音端点检测是对接收到的信号利用端点检测算法分析,以确认麦克风阵列中语音信号到达的端点;并利用麦克风阵列中各麦克风接收到的语音信号的端点的先后,计算出麦克风阵列接收的来自于声源的时间差;根据麦克风阵列之间的时间差,应用所提出的声源定位的方法,继而计算出声源的空间位置。本系统定位精度较高、实时性好,可应用于许多场合,如视频会议、机器人语音识别、语音助听装置等。Sound source location system based on microphone array collects the sound signal by microphone array.TLV320AIC23B converts analog sound signal to digital signal.TMS320DM642 analyses the digital sound signal and detects the endpoints of the sound signal to the microphone.The endpoint detection is one of the important factors to determine the precision of this system.Because the distance between sound source and one microphone of the microphone array,the time tij indicates the time interval of sound from microphone I to microphone J.To get the time tij,the TMS320DM642 is used as core control device.TMS320DM642 works out the sound source position according to the principle of sound source location which is reduced.The system of sound location based on TMS320DM642 is a high-precision and real-time system,and may be used to video session,robot speech recognition,hearing-aid,etc.

关 键 词：声源定位 麦克风阵列 TMS320DM642 端点检测 

分 类 号：TN912.3[电子电信—通信与信息系统]