Robust pitch estimation with harmonics enhancement in noisy environments based on instantaneous frequency
Robust pitch estimation with harmonics enhancement in noisy environments based on instantaneous frequency
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基于瞬时频率的噪声环境中具有谐波增强的鲁棒基音估计
DOI：
10.1109/icslp.1996.607843
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
S. Imai
中科院分区：
文献类型：
--
作者：
Toshihiko Abe;Takao Kobayashi;S. Imai
提出了一种基于瞬时频率（IF）的噪声环境下语音基音周期估计方法。首先，它们定义IF幅度谱，该幅度谱是通过将STFT幅度谱投影到IF轴上而获得的。基于中频幅度谱，可以通过抑制非周期分量来实现谐波增强。接下来，他们定义了一个评估函数来找到音高。这是通过将IF幅度频谱扩展到时间区域来实现的。然后，他们提出了一种使用动态规划获得连续音高轮廓的方法。实验结果表明，该方法具有较好的准确性和鲁棒性，特别是在噪声存在的情况下。
The authors propose an approach for estimating pitch of speech in noisy environments based on instantaneous frequency (IF). First, they define the IF amplitude spectrum, which is obtained by projecting the STFT amplitude spectrum onto the IF axis. Based on the IF amplitude spectrum, one can perform harmonics enhancement by suppressing the aperiodic components. Next, they define an evaluation function to find pitch. This is done by expanding the IF amplitude spectrum to the time region. Then they propose a method for obtaining a continuous pitch contour using dynamic programming. Experiments show accuracy and robustness of the method especially when noise exists.