自适应抗噪声送话器的算法研究

Algorithm Research of Adaptive Anti-noise Telephone Transmitter

介绍了一种改进后的ＬＭＳ算法（ｗｅｉｇｈｔｅｄｓｕｍ），使自适应滤波器权值更新的步长随着系统输出信号功率的变化而变化。在效果评价时提出了计算语音信号信噪比提高量的一个简单方法，即通过控制前后语音间隙的噪声能量的对比得出结果。

In this paper the improved LMS algorithm (weighted sum) is introduced, which enables the stepwidth of regeneration of adaptive filter weighted value to change along with the variationof output signal power of the system. When estimating the effect a simple method, i.e. controlling thecomparison of noise energy of two voice gaps, which can be used to calculate SNR increase of speechsignal, is presented.