Voice signal acquisition system based on DSP

• Main Authors: SONG NING, LU ZHENGYAN, LI GUIJIAO, FANG JIANFENG, LI JINBAO
• Format: Patent
• Language: Chinese; English
• Published: 06.11.2020
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The invention discloses a voice signal acquisition system based on a DSP. The voice signal acquisition system comprises a differential amplification circuit, an A/D conversion circuit, a DSP processing circuit and a serial port expansion circuit. After eight paths of voice signals are conditioned by the differential amplification circuit, AD conversion is carried out by the A/D conversion circuit,and converted data enter the DSP processing circuit to be processed and then are uploaded to an upper computer through the serial port expansion circuit and an RS232 interface. According to the system, eight paths of voice signals are synchronously acquired and decoded in real time by utilizing the McASP and EDMA technologies in the DSP. Compared with a common data acquisition system, the systemis high in acquisition precision, good in linearity, stable in work, high in signal-to-noise ratio, clear in tone quality, high in sound reduction degree and high in practicability, and is particularly suitable for data acquis