Design And Implement Of Digital Speech Filter Based On SOPC

As the core part of audio signal process system , digital audio filter used in areas of communication , voice recognization and voice enhance widely. Every digital filter take on especial the application scope , and it's performance plays import role in the quality of the products,so scientific community and industrial community reached deeply in this side and invented many structures of filter. Generally, filter was designed for special frequency scope,so it can't be reused ,especially for different application, this brings different in system updating and test.So SOPC occurred, it has the virtual of programmable, easy to connect. Recently programmable system becomes the important direction in system design, and attains communications company's attentionRecently, SOPC come into people's sight as a branch of embedded technology .It has the process capability like CPU and also has the programmable capability of hardware. The system rebuild and connect problems will be solved if SOPC could be used in audio signal processing area. This subject successfully resolved the problem of system rebuilding by FPGA, offer the way of adjustable parameters and adjustable structures, let the function of sampling, processing and playing working on single FPGA , reducing the cost and complexity of connection peripheral devices.The system amalgamation the concept , algorithms and implemention together , achieve all the hardware & software on a FPGA chip, with the character of small bulk ,programmable and rebuilding , with the reference value to processing of the audio signal and products design.