Design of DSP-Based Voice Signal Acquisition System

针对传统语音信号采集系统抗干扰能力差、精度低、稳定性差的问题，设计了一款基于DSP处理器的语音信号采集系统。该语音信号采集系统由电源供电电路、差分放大电路、A/D转换电路、DSP处理电路、FLASH存储电路、串口扩展电路组成。采用TMS320C6713作为核心控制器，采用ADS1278作为AD转换器，对语音信号进行同步采集和实时存储。试验结果显示，该系统采集精度高、采集的音频信号信噪比高，音质清晰，声音还原度高，达到了较好的性能。In order to solve the problems of poor anti-interference ability, low accuracy and poor stability of traditional speech signal acquisition system, a speech signal acquisition system based on DSP processor was designed. The voice signal acquisition system is composed of a power supply circuit, a differential amplification circuit, an A/D conversion circuit, a DSP processing circuit, a FLASH storage circuit, and a serial port expansion circuit. The TMS320C6713 is used as the core controller, and the ADS1278 is used as the AD converter to synchronously collect and store the voice signal in real time. The test results show that the system has high acquisition accuracy, high signal-to-noise ratio, clear sound quality and high sound restoration, and achieves good performance.