改进G.728语音编码算法的增益滤波

Enhanced Gain Filtering of G.728 Speech Coding Algorithm

根据一阶数字滤波器的低通特性 ,提出了改善 G.72 8算法增益滤波器性能的方法 ,实验结果表明此方法可使平均分段信噪比提高约 0 .5 d B.以此为筹码 ,可以降低 G.72 8算法其他模块的计算复杂性。

Based on the low pass character of one order digital filter, this paper proposes a method improving the performance of G.728 gain filter. In our experiment, it was shown that the average segment SNR have been raised about 0.5 dB with the method. Based on it, the complexity of the other LPC filters can be decreased.