Speech enhancement as the front-end processing module is used to improve the Signal-to-Noise Ratio (SNR) of the input signal for recognition in the latter stages.

• 为了让语音识别系统在安静的环境和有噪声的环境中都获得令人满意的工作性能，研究了一个将语音增强器和语音识别器级连起来的系统。