基于一定的解码状态，声码器通过最小均方误差（MMSE）估计的方法估计最优参数，充分降低信道误码对重建语音质量的影响。

The minimum mean square error (MMSE) is computed for each decoding state to estimate optimal parameters and to reduce the influence of the bit error.

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实验结果表明：在1%以上的随机误码率下，采用本文提出的纠错 算法后，信道误码引起的声码器基音参数误差能够降低10%以上。

Tests show, the modified restoration scheme can reduce the pitch error due to channel errors at least 10% on channels with bit-error-rates above 1%.

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