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Audio signal frequency analysis method - using window functions to provide sample signal blocks subjected to Fourier analysis to obtain respective coefficients.
Audio signal frequency analysis method - using window functions to provide sample signal blocks subjected to Fourier analysis to obtain respective coefficients.
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机译:音频信号频率分析方法-使用窗口函数提供经过傅里叶分析的样本信号块,以获得相应的系数。
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摘要
The frequency analysis method involves dividing an input signal, represented by discrete sample values, into overlapping blocks using a window function and subjecting them to a Fourier transformation, to obtain a set of coefficients. Each input signal block is evaluated via a set of differing symmetrical window functions of equal length, their Fourier transformations having different bandwidths. The simultaneously generated blocks are used to provide a set of characteristic Fourier transformations, with a coefficient provided for each block, dependent on the window function Fourier transformation bandwidth. The selected coefficients have frequency bands which are only slightly overlapping, or only slightly spaced apart. USE/ADVANTAGE - Accurate simulation of human hearing characteristics. At least first five spectral coefficients processed together, e.g. in fast fourier transformation.
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