实时高精度麦克风阵列数据采集系统

针对麦克风阵列语音增强系统对高精度和强实时性数据采集的需要，设计并实现了一种基于FPGA的麦克风阵列数据采集系统。其主要包括数模转换模块、数据接收处理模块和以太网控制模块3部分，实现了对16路语音信号的高质量采样和传输。系统中，将UDP数据报协议用硬件编程语言verilog在FPGA上实现，与基于操作系统的TCP/IP协议族实现UDP协议相比，大大提高了资源利用率。测试结果表明，系统能完成16路语音信号的高精度、高可靠性实时采集和传输，以太网传输速率达2.3MByte/s，满足了麦克风阵列语音增强系统的研究需要。 

Real-time High-precision Microphone Array Data Acquisition System

For microphone array speech enhancement system of high precision and strong real-time data acquisition needs, a FPGA-based microphone array data acquisition system has been designed and implemented. The system which mainly includes digital-to-analog conversion module, data receiving-processing module and the Ethernet control module achieved high-quality sampling and transmission rate for 16-channel-voice signals. In this system, UDP datagram protocol was implemented on FPGA by using Verilog which is a hardware programming language. Compared with the UDP protocol implemented on the TCP/IP protocol family of operating system, the resource utilization is greatly improved. The test results show that the system can collect and transmit the 16-channel-voice signals with high-precision, high-reliability real-time acquisition, and the Ethernet transmission rate is 2.3MByte/s , which met the research needs for microphone array speech enhancement system.