基于GSC结构的多通道语音补偿算法研究

Multi-channel Speech Compensation Algorithm Based on GSC Structure

广义旁瓣抵消器自适应波束形成算法对受固定干扰源影响的目标语音有良好的消噪效果,但在自适应抵消模块不可避免地存在语音泄漏,使目标语音受到一定损失,且残留部分背景噪声。文中先对传统的GSC结构自适应波束形成算法进行研究,分析语音泄漏的原因,并提出一种多通道语音补偿方法对GSC结构消噪后的语音进行补偿。对不同频段的噪声帧和语音帧做针对性处理,同时在对语音进行分割时保护共振峰,防止其发生偏移和变形,仿真实验与测试结果表明,该方法可以有效地补偿语音泄漏,消除残留噪声,提高语音可懂度。

Generalized sidelobe canceller （GSC） adaptive beamforming algorithm can effectively remove the fixed interference source noise in the target speech,but there is inevitably speech leakage in the a daptive offset module.The leakage can cause the loss of the target speech and will remain some noise.Firstly,this paper analyzes the reason for the leak of speech,Then,a multi-channel speech adjustment compensation method is proposed to compensate the leak of speech.Corresponding handle for noise frame and speech frame of different frequencies is made,and formant is protected when conducting speech segmentation to prevent the deviation and distortion.Simulation and experimental results show that the method can effectively compensate the speech leakage,remove residual noises and improve the speech intelligibility.