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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。
By analyzing the causes of residual echo, a residual echo suppression technique based on voice activity detection is proposed. Described in detail the residual echo suppression technology works. In order to carry out accurate voice activity detection on the remote end, a scheme of voice activity detection is designed and the chosen detection algorithm is analyzed. Finally, the residual echo suppression technology is implemented on Android smartphones, and compared under different environmental conditions. The test results show that the proposed residual echo suppression technology can effectively suppress the residual echo, without affecting the actual experience of mobile phone users.