学习并找到降噪方法，对语音信号背景噪声做处理，使得声音更清晰。-The background noise is the most common factor degrading the quality and intelligibility of speech in recordings. Spectral subtraction can lower the noise level without affecting the speech signal quality. In this pape

FFT中 旋转因子8位复数乘法的VHDL程序，3次实数乘法和3次加减法运算，-FFT twiddle factor of the VHDL program, 3 times real multiplication and subtraction 3

FFT算法的C语言实现，内含有复数的加法，乘法，减法，输入序列的倒序，旋转因子的确认，FFT算法的实现-FFT algorithm C language, containing reverse complex addition, multiplication, subtraction, input sequence, rotation confirmation factor FFT algorithm to achieve