摘要
研究讨论了用于麦克风阵列的高信噪比定向采音算法,设计实现了麦克风阵列语音采集系统。通过对采集到的空间中不同方向音频进行数字信号处理,使阵列形成的波束主瓣指向目标语音,零陷指向干扰源,提高采音信噪比,实现对声源的定向采音等。测试结果表明,本系统采音效果良好,采集到的声音信号主瓣很窄,能够实现高信噪比定向采音。
Different oriented sound collecting algorithms which have high signal-to-noise ratio （SNR） are compared and a sound collecting system based on microphone array is introduced in the article. Using digital voice processing technologies to deal with the signal collected from different directions, the array utilizes beamforming to enhance the signal from the direction of interest, and attenuates unwanted signal by hulling other directions to increase SNR. Testing results show that this system can collect the signal with good effect and high SNR, and has a narrow main lobe beamwidth.
出处
《微型机与应用》
2013年第1期14-16,19,共4页
Microcomputer & Its Applications
关键词
麦克风阵列
语音处理
SMI算法
定向采音
microphone array
voice processing
SMI arithmetic
directional sound collecting
