基于Duffing共振的语音真伪检测技术研究

Detection of speech authenticity based on duffing resonance

在数字语音真伪技术中,基于电网频率的检测方法是当前研究的热点。由于数字录音设备在录音过程中不仅记录语音内容本身,还携带微弱的电网电压或电流信号,利用Duffing共振理论来提取数字录音信号中的微弱电网信号,根据其输出特征参数的幅频特性和相频特性来判断录音文件的真伪性。通过实验分析论证了该方法的可行性和实用性,为数字录音真伪鉴别技术提供了一条新的研究方向。

At present,in the group of digital speech authenticity technology,the detection method based on eleetrie network frequency is a hotspot.The digital recording equipment which not only records the voice signal in recording process,but also records weak voltage or current signal.Because of this reason,The theory of Duffing resonance is used to extract the weak eleetrie network frequency in digital speech signal.According to its amplitude-frequency characteristic and phase-frequency characteristic of output characteristic parameters,the authenticity of the recording file has been judged.Based on experimental analysis,the feasibility and practicability of the method is improved,thus,it provides an efficient path for digital recording authenticity technology.