Based On Dsp Digital Switch Sound Recording System Design And Implementation

The system, a recording and playing speech system of program-digital-switchboard, can record several routes of speech at one time. It also can offer nice original speech signals records. Firstly, it comes into being as the requirement of security department. Afterward, it is used widely because of its perfect function.Comparing to the analog signal system, the digital signal system has high quality, such as the agility, credibility, and the clarity of speech. So in my system, the technique of digital signal processor is imported. It can be used to filter and encode the signal of speech signals.My system is constituted of the hardware and software. The hardware circuit connects to the PC by ISA Bus. Its aim is the entire function and the convenience of searching. The TMS320VC5402 of TI Corporation, which has high power but low price, is selected as the CPU of this system.The technique of DSP is the best character of my system. It not only can make the hardware circuit of the system simply, but also can enhance the real-time and capability of the system. In a word, it makes my system perfect.