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设计技术对并行静入的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数据接口而出,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.%It is the common way to design the system of audio data Requisition 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 Mod-elSim 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.
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