目前的一些鲁棒性环境补偿方法具体可分为两大类：前端处理方法和后端（声学模型）处理方法。

We can categorize many state-of-the-art environment compensation approaches into two classes: the front-end and the back-end (acoustic model) processing approaches.

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噪声鲁棒性的方法多种多样，但一般来说可分为前端方法和后端方法两大类。

The noise-robust methods are various and be roughly classified into two categories: front-end methods and back-end ones.

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为了能够在低运算资源的设备上实现鲁棒性前端，在ETSI标准的核心两级维纳滤波算法的基础上，我们提出了一种新方法以提高算法效率。

In order to use the robust feature in low computational resource device, on the basis of two-stage Wiener filtering algorithm in ETSI Standard, we propose a novel approach to improve the efficiency.

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