新的自适应盲噪声抑制在语音处理中的应用

Application of New Apaptive Noise Suppression to Speech Processing

传统的自适应滤波去噪的系统中需要一个参考信号,实际中一般事先并不知道噪声的特性,而且噪声也是时变的。因此提出一种新的基于盲噪声抑制方法,可降噪并跟踪噪声特性的变化,随时调节滤波器的系数,比传统的自适应噪声控制具有优势。

For a conventional system of adaptive filtering canceller,a reference signal is necessary, while noise characteristics cannot be obtained in advance. Furthermore, it may change with the variable time. A new method based on adaptive blind noise suppression is introduced, which can not only suppress the noises but also adapt the weight of filter by tracking the change of noise characteristics, so it has more advantages than adaptive noise canceller.