System Design Of Digital Voice Memorization & Playback Based On AMBE-1000

With the rapidly growth of multimedia information in society, it has gradually become a necessary mean to deal with and store the information effectively. Being one of most used information carriers, the voice signal memorization also becomes more and more important. Compared with the traditional simulation ways, the digital voice recording way has omitted the mechanical structure which is easily damaged. It has long life, the high reliability of storage, the high effectiveness of the using space the convenient access and so on. Therefore, the application of the digital voice recording system has become a trend. The thesis analyzes the current several kinds of solution plan of the voice recording system, and compares the present digital voice system products in domestic and overseas. In view of some domestic product flaws, author proposes a reliable and suitable design idea of the digital voice system.The system adopts an advanced specific speech compression chip based on AMBE algorithm. It can achieve good voice quality and high compression rate at 2.4 Kb/s. The memory chip selected large capacity Flash memory to realize mass memory of the voice data.The hardware part of the digital voice system firstly analyzes the composition structure and the principle of work, introduces the main chip AMBE-1000 characteristic. In this foundation carries on the modular circuit design, mainly divided into control unit, voice code and decoding unit, audio data acquisition unit, the chip external storage expansion unit and so on.The software part of the digital voice system mainly introduces the design of control programming, the key is data transmission and receive. The thesis explains the control procedure design mentality in detail, points out some key of the software design and some question to which need to pay attention, and gives the program flow diagrams.After the hardware and the software design, the thesis introduces the PCB design, then carries on the hardware debugging and the system performance testing after making the electric circuit board, finally draws the conclusion: the system can realize the good voice quality and the long time voice information storage, achieves the design anticipated effect, and has certain market application value.The thesis finally summarizes the completed work, and introduces the main characteristic, meanwhile analyzes the system deficiency, points out the diligently direction.