基于谱减平滑算法的语音窄带干扰抑制技术

针对传统谱相减法所带来的噪声谱估计不能及时更新和＂音乐噪声＂比较明显等问题,引入了话音激活检测,设计了新的检测方法.在传统的谱减运算基础上增加了平滑运算,提出了一种新的基于改进的谱相减法--谱减平滑算法的语音窄带干扰抑制技术,并对传统算法和新算法进行仿真比较.结果表明,新算法较好地解决了传统算法存在的问题,比传统算法有更优的频谱特性、更高的输出信噪比和更好的听觉性能.

Re ject ion of narrowband interference in speech based on spectrum sub traction smoothing

To solve such problems as noise spectrum estimation not updating in time and evident "music" noise brought by the conventional spectrum subtraction,the voice activity detection(VAD)were introduced,new interference detection method designed and smoothing operation based on conventional spectrum subtraction added,and then a new narrowband interference rejection technique in speech presented based on an improved spectrum subtraction:spectrum subtraction smoothing.The experiment results show that the new arithmetic outperforms the conventional one in spectrum characteristic,output signal-to-noise ratio(SNR) and aural performance.