手机VoIP残余回声抑制技术的研究

通过分析残余回声产生的原因,提出了基于话音激活检测的残余回声抑制技术。详细阐述了残余回声抑制技术的工作原理。为了对远端进行准确的话音激活检测,设计了话音激活检测的实现方案,同时对选择的检测算法进行了分析。最后,在Android智能手机上实现了残余回声抑制技术,并在不同的环境条件下进行了对比测试。测试结果表明采用文中提出的残余回声抑制技术可以有效的抑制残余回声,同时不影响手机用户的实际体验。

Study on Residual Echo Suppression Technique of Mobile Phone VoIP

By analyzing the causes of the residual echo,this paper puts forward the residual echo suppression technology based on voice activation detection. It also expounds the principle of residual echo suppression technology. To accomplish voice activation detection of distal accurately,the voice activation detection scheme is designed,and the selection of detection algorithm is analyzed. Finally,the residual echo suppression technology is realized on the Android smart phone,and the contrast test under different environmental conditions is made. Test results show that the residual echo suppression technology proposed in this paper can effectively suppress the residual echo,and does not affect the mobile phone users actually experience.