首先通过跟踪平稳噪声能量，检测能量变化非平稳的信号；

First, the noise energy is tracked to detect the unstable signal.

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其中频谱的非零频率信息可提取噪声能量，频谱的零频率信息可提取信号能量。

Then, noise energy can be abstracted from the nonzero frequency information of the spectrum, and signal energy from zero frequency information.

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本文首先提出了客观评价噪声压缩效果的两个指标：残余噪声能量和信号畸变指标。

This paper firstly presents two criteria: residual noise energy and signal distortion criterion to evaluate the degrees of noise suppression and signal distortion.

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