Design of MP3 Audio Signal System Based on DSP

This paper develops a MP3 audio signal processing system based on TMS320VC5402 and STA013. The system contains signal acquisition, encoding, decoding and filtering audio digital signals. This paper simply introduces the chips of STA013 and TMS320VC5402 and their hardware connection. According to the features of signal, the parameters of filter are simulated and algorithm of filter is designed to realize denoising in the Matlab. Then the high order filter is designed in the DSP. The transfer function of the filter is transformed into concatenation form. It contains several second-order basic sections. This paper gives the main source program. The program is simple and verified through experiments in the TMS320VC5402. It has short running time, obvious regularity and the virtue of being practical. The results show that the system has good purpose and adaptability. It can be used and improved easily.