一种改进的手机双麦克风消噪系统

发布时间：2019-05-30 10:10

【摘要】：针对现有手机双麦克风消噪系统无法应对多种复杂噪声环境、在消除噪声的同时会引起语音失真等问题,本文提出一种新的手机双麦克风消噪系统。该系统将时域与频域处理结合,在噪声估计和消除两方面均有改进,结合单、双麦克风的噪声估计算法,提高了噪声估计的准确性。此外,将基音检测与消噪处理结合,在语音帧中估计语音基音频率,确定语音和噪声频率点,根据语音和噪声频率点分别调整维纳滤波器参数,在滤除噪声的同时尽可能地保留语音频率点,从而减少语音失真。实验结果表明,与现有双麦克风消噪系统相比,本系统在抑制噪声的同时能够有效减少消噪算法对语音造成的损害,提高了手机通话质量,对于方向性的语音干扰也起到很好的抑制效果。
[Abstract]:In order to solve the problems that the existing mobile phone dual microphone denoising system can not cope with a variety of complex noise environments and will cause speech distortion while eliminating noise, a new mobile phone dual microphone denoising system is proposed in this paper. The system combines time domain and frequency domain processing, and improves the accuracy of noise estimation by combining the noise estimation algorithm of single microphone and double microphone. In addition, the pitch detection and denoising processing are combined to estimate the speech pitch frequency in the speech frame, determine the speech and noise frequency points, and adjust the Wiener filter parameters according to the speech and noise frequency points, respectively. The speech frequency points are preserved as much as possible while filtering the noise, so as to reduce the speech distortion. The experimental results show that compared with the existing dual microphone denoising system, this system can effectively reduce the voice damage caused by denoising algorithm and improve the quality of mobile phone calls. It also has a good suppression effect on directional speech interference.
【作者单位】：南京师范大学物理与科学技术学院江苏省音频技术工程实验室;
【基金】：新一代智能手机多麦克风消噪音频测试与辅助设计系统关键技术研究(BE2014139)
【分类号】：TN912.3

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