基于FPGA的多路音频采集与接口系统设计与实现

在音频数据采集系统中,一般采用专用设计芯片实现,功能单一,且采集能力受限,接口模式固定。本文提出了一种多路音频数据采集和接口功能设计方案,借助FPGA设计技术对并行输入的4路16 k采样、8 bit精度的音频数据进行实时采样、缓冲,并且通过目前应用很广泛的McBSP数据接口输出,最终通过ModelSim软件进行系统仿真,调试并验证了该方案。所设计的系统是基于FPGA架构的模块化设计,具有很好的实时性和稳定性,层次清晰,便于修改和扩展,具有较好的工程应用和参考价值。

Design and Implementation of Multi-channel Audio acquisition and interface system Based on FPGA

It is the common way to design the system of audio data acquisition with ASIC,which is weak-function,limited-acquisition ability and fixed-interface mode.A kind of multi-channel audio data acquisition and interface design using FPGA design technology is put forward.The source audio data come from four channels,which is 16 kHz sampling rate and 8 bit accuracy.This system can sample them in real-time.Then they are buffered and formed to the sequence of McBSP interface to output which is very popular in application.Finally through the ModelSim software system simulation,debugging,it validate the design scheme.The design of the system is based on the FPGA architecture,which has a good real-time performance and stability.Meanwhile,it’s easy to be modified and extended.