Abstract：The processing technology of the voice signal is studied with Fast Fourier Transform (FFT) and FIR filtering in order to solve the problem that need higher requirements of processing speed and storage space as the voice signal is processed with an embedded system.It turns out that the algorithm is effective as the test is made by MATLAB software.The synthesis algorithm which FIR filtering is made after FFT is performed can be used for an embedded system.A reference is provided for improving on the effect of the voice signal processing.

Keyword：fast fourier transform;speech signal;MATLAB;embedded system;filtering;