Determination of pitch of noisy speech using dominant harmonic frequency
Determination of pitch of noisy speech using dominant harmonic frequency
复制标题
使用主谐波频率确定噪声语音的音高
DOI：
10.1109/iscas.2003.1206034
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
S. A. Fatath
中科院分区：
文献类型：
--
作者：
Md. Kamrul Hasan;C. Shahnaz;S. A. Fatath
本文提出了一种噪声鲁棒方法，用于使用从语音观察中对主谐波频率 (DHF) 进行最小二乘估计来确定音调，该语音由谐波正弦波模型表示，受到白噪声的严重破坏。使用所提出的无噪声语音信号的正弦自相关模型（SAM）可以有效地估计 DHF。该方法基于将脉冲序列的周期（以估计的 DHF 的整数倍变化）与由平均幅度差函数（AMDF）强调的噪声语音的增强自相关函数相匹配。仿真结果表明，即使在信噪比（SNR）低至-5 dB的情况下，该方法也能以较高的精度检测基音。
This paper presents a noise robust method for determination of pitch using least-squares estimate of the dominant harmonic frequency (DHF) from observations of speech, represented by a harmonic sine-wave model, heavily corrupted by white noise. The DHF is effectively estimated using the proposed sinusoidal autocorrelation model (SAM) of the noise-free speech signal. The method is based on matching the period of an impulse train, varied as the integer multiple of the estimated DHF, with the enhanced autocorrelation function of the noisy speech emphasized by the average magnitude difference function (AMDF). The simulation results show that the proposed method can detect pitch with higher accuracy even at a signal to noise ratio (SNR) as low as -5 dB.