FPGA based Implementation of an Audio Signal Processing System on Zedboard
AUTHORS
Shensheng Tang,4Department of Electrical and Computer Engineering, St. Cloud State University, St. Cloud, MN 56301, USA
Siong Moua,Department of Electrical and Computer Engineering, St. Cloud State University, St. Cloud, MN 56301, USA
Yi Xie,School of Computer Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, China
Yi Zheng,Department of Electrical and Computer Engineering, St. Cloud State University, St. Cloud, MN 56301, USA
ABSTRACT
An FPGA based audio signal processing system is designed and implemented through an input and output circuit created on the breadboard, a Vivado project and an SDK application program involving the Zedboard, and a C# GUI application for the serial port communication with the Zedboard. In the SDK application development, we use the Matlab filter designer tool for an FIR LPF design and generated the filter coefficients file for the SDK programming. The filtering is designed by the convolution operation and implemented through C/C++ programming. A modified mean normalization algorithm is proposed to apply to the filtered data samples. Finally, the integrated system is tested through a mixed music and interference tone signal. Experiment results verified the successful implementation of the audio signal processing system on FPGA (Zedboard). This paper provides hands-on experience in FPGA based embedded system design and implementation through Xilinx Vivado and SDK tools as well as C# GUI programming.
KEYWORDS
FPGA, Vivado, SDK, Zedboard, C/C++, C# GUI, FIR Filter, Convolution, Normalization
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