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Improved single channel phase-aware speech enhancement technique for low signal-to-noise ratio signal

机译：低信噪比信号的改进的单通道相位感知语音增强技术

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摘要

In the state-of-the-art single channel speech enhancement techniques, the short-time spectral amplitude is modified while the effect of the phase corruption due to the contamination of additive noise is neglected. This study introduces an improved speech enhancement algorithm based on a phase-aware multi-band spectral subtraction technique which estimates the spectral amplitude of the clean speech signal by considering the phase of the speech and noise signal components, and uses the estimated phase of the clean speech signal for signal reconstruction in the time domain. Experimental results show that the proposed algorithm yields better performance in terms of various objective and composite quality measures and other intelligibility assessment metrics while compared with other existing spectral subtraction methods. Using the composite objective measure quality evaluation technique, it is observed that the overall signal quality of the enhanced speech signal is improved on an average by 70% at 0 dB global input signal-to-noise ratio by using the proposed approach.
机译：在最新的单通道语音增强技术中，短时频谱幅度被修改，而由于附加噪声的污染而引起的相位破坏的影响被忽略。这项研究引入了一种改进的基于相位感知多频带频谱减法的语音增强算法，该算法通过考虑语音和噪声信号分量的相位来估计纯净语音信号的频谱幅度，并使用纯净的估计相位语音信号用于时域中的信号重建。实验结果表明，与其他现有的频谱减法方法相比，该算法在各种客观和综合质量测度以及其他清晰度评估指标上具有更好的性能。使用复合客观测量质量评估技术，可以观察到，通过使用所提出的方法，增强语音信号的总体信号质量在0 dB全局输入信噪比的情况下平均提高了70％。

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