Based Embedded Systems In-vehicle Voice Recorder To Achieve

The voice recording instrument is a kind of important electronic voice recording equipment. It is widely used in an open area such as military, transportation, public security, fire prevention, telephone service quality surveillance and so on. The digitalization, internet and the function diversification become the new tendency of the next generation voice recording technology.This paper introduced the realization of the voice recording instrument based on the embedded system. Firstly, the dissertation analyzed the performance index of the instrument. Secondly, the dissertation proposed the design principle and the project architecture, introduced the implementation of the hardware-design and the software-programming. At the same time, the anti-jamming measurement was used both in hardware and software to improve the reliability. Finally, debugging and testing were discussed through the designing process.The voice recording instrument adopts 8bit PCM and 4bit ADPCM voice coding and decoding mode, can record the eight-channel voice signal simultaneously. It can save the recorded data in the flash memory or in the PC through the Ethernet. The recorded voice signal data also can be played back. With the features of the quick storage speed, reliable performance, excellent transmitting performance, the voice recording instrument can satisfied the military demand, provided an effective way to improve the military training quality and battling effectiveness. This instrument has a widely market prospect.