利用长时平均FFT功率谱进行话者识别

Identification of Speaker with the Power Spectrum of FFT

长时平均FFT(fast fourier transform)功率谱,是利用快速傅立叶变换FFT方法算出的每帧的短时频谱的长时平均。FFT功率谱中可以直观反映出基音周期以及各谐波能量、频率、形态和它们相互的组合关系,同时能反映出谐波能量较高的尖峰所对应的声道共振峰。根据本实验,对元音提取长时平均FFT图谱进行图谱形态比对和重叠比对,是话者识别的有效方法。

Long time FFI（ Fast Fourier Transform）is the long time average of short time spectrum of every picture calculated by FFI. It will reflect cycle time of basic sound directly and power, frequency, form of every harmonic and the combinative relation among them. It will also reflect the channel formant correspondent with the highest energy peak of harmonic. Morphology comparison and overlapping contrast to the vowels with FFT is the effective way to identify the speaker based on the experiment.