摘要： 设计并实现了一种基于FPGA的六通道音频信号评估系统。系统由最高64 kS/s的16位模数转换器AD73360对常用音频信号进行采样。设计了一个嵌套式状态机，按照状态跳变，将输入信号暂存到FIFO中。FIFO中的数据会通过USB协议上传到电脑端的MATLAB GUI(Graphical User Interface)中，GUI负责处理数据并显示结果。系统配备了ARM处理器作为辅助，可以根据不同的ADC采样频率和输入信号频率，计算并实时纠正FPGA和GUI的通信波特率，确保不丢码。试验结果表明，该系统可以实现对音频信号的高精度采集。该系统为保真采集音频信号提供了完整的解决方案。

中图分类号： TP216
文献标识码： A
DOI：10.16157/j.issn.0258-7998.211983
中文引用格式： 张皓然，万书芹，蒋颖丹，等. 基于FPGA的多通道音频信号评估系统[J].电子技术应用，2022，48(2)：78-83，90.
英文引用格式： Zhang Haoran，Wan Shuqin，Jiang Yingdan，et al. Evaluation system of multi-channel audio signal based on FPGA[J]. Application of Electronic Technique，2022，48(2)：78-83，90.

Evaluation system of multi-channel audio signal based on FPGA

Abstract： A six-channel audio signal evaluation system based on FPGA is designed and implemented.64 kS/s 16-bit analog-to-digital converter(ADC) AD73360 is used to sample common-used audio signals. A nested state machine is adopted to pump input data into a FIFO according to states jumps. The data in FIFO is uploaded into the MATLAB GUI(Graphical User Interface) on computer by USB protocol. The GUI is used to process data and display the results. The system is equipped with auxiliary ARM to calculate and correct the baud rate of communication between FPGA and GUI, keeping from losing codes. The results show the system can sample audio signals in a high precision. The system provides a whole solution for sampling audio signals with true fidelity.

Key words : FPGA；nested state machine；FIFO；analog-to-digital converter；MATLAB GUI