Design and implementation of voice signal processing system based on DSP and FPGA

摘要

How to design a practical, low-cost voice signal processing system has been paid more attention since voice signal processing plays a significant role for information exchange in our highly developed information society. The paper firstly introduces the function block diagram of the voice signal processing system and its processing method; then expatiates the hardware design based on DSP (Digital Signal Processor), offers key reference circuits and some design principles of the system; finally, puts forward the speech recognition software disposal processing for system function verification. Since the system adopts DSP processing technology, it has high efficiency; at the same time, is practical and low-cost. Otherwise, in the memory expansion and interface of the system design, FPGA (Field Programmable Gate Array) is used as the system decode device and interface between DSP and CODEC. In this way, the system realizes the function dividing, so computing circuit of the DSP has been used more appropriate. At the same time, the FPGA improves the flexibility and reduce the cost and the time to market.