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arXiv math/0502252math.NAcs.NA
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正交离散听觉变换

An Orthogonal Discrete Auditory Transform

Jack Xin, Yingyong Qi

AI总结:

结合Schroeder等人的听觉扩展矩阵和离散非局部薛定谔方程的时间一映射,构造了从声音信号到频谱的正交离散听觉变换(ODAT),其频谱比离散傅里叶变换(DFT)更平滑,在高噪声水平下信号去噪性能优于DFT。

摘要:

通过结合Schroeder等人的听觉扩展矩阵和离散非局部薛定谔方程的时间一映射,构造了从声音信号到频谱的正交离散听觉变换(ODAT)。由于薛定谔演化的色散平滑性质,ODAT频谱比离散傅里叶变换(DFT)更平滑,与人类听觉一致。在采用频谱阈值法的信号去噪测试中,对ODAT和DFT进行了比较。信号为含噪语音片段。当噪声水平相对较高时,ODAT在信噪比(SNR)方面优于DFT。

英文摘要:

An orthogonal discrete auditory transform (ODAT) from sound signal to spectrum is constructed by combining the auditory spreading matrix of Schroeder et al and the time one map of a discrete nonlocal Schrödinger equation. Thanks to the dispersive smoothing property of the Schrödinger evolution, ODAT spectrum is smoother than that of the discrete Fourier transform (DFT) consistent with human audition. ODAT and DFT are compared in signal denoising tests with spectral thresholding method. The signals are noisy speech segments. ODAT outperforms DFT in signal to noise ratio (SNR) when the noise level is relatively high.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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