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Artificial Intelligence, 1975, 6(3): 215234.致　謝畢業(yè)設(shè)計(jì)是對(duì)我們知識(shí)運(yùn)用能力的一次全面的考核，也是對(duì)我們進(jìn)行科學(xué)研究基本功的訓(xùn)練，培養(yǎng)我們綜合運(yùn)用所學(xué)知識(shí)獨(dú)立地分析問題和解決問題的能力，為以后撰寫專業(yè)學(xué)術(shù)論文和工作打下良好的基礎(chǔ)。設(shè)計(jì)已經(jīng)結(jié)束了，經(jīng)過了半學(xué)期的努力終于完成了本次設(shè)計(jì)，首先要感謝我的指導(dǎo)老師葛莉老師，每有問題，老師總是耐心的解答，使我能夠充滿熱情的投入到畢業(yè)設(shè)計(jì)中去；還要感謝我的同學(xué)們，他們熱心的幫助，在課題的研究方向和有關(guān)書籍介紹都給了我很大的幫助，同時(shí)我也要感謝我的同組成員穆明。在設(shè)計(jì)過程中，我們互相討論遇到的問題，收獲很多。 附　錄附錄Ａ　外文資料原文The research and application of digital Digital voice recorderOverall DescriptionISD4004 is the ISD pany manufacturing a new voice chip. Using the voice chip ChipCorder patent technology. The chip without A/D conversion and pression can direct store, without A/D conversion errors, in A record bits (BIT) voice signal can be stored 250 level, equivalent to A/D usually record 8 times. Slice the crystal oscillator in integration, mike preamplifier, automatic gain control and so on, as long as few peripheral equipments, can form a full audio recording system. And the ISD other series pronunciation product different is, ISD4004 is a micro controller from equipment, and Lord controller can be patible with the micro controller interface SPI, also can use the I/O simulation SPI munication protocols. ISD4004 series for working voltage 3V, monolithic recording time of 8 ~ 16 minutes, timbre, suitable for mobile phones and other portable electronics. This chip adopt CMOS technology, contains the oscillator, fight aliasing filter, smoothing filter, audio amplifiers, since the action pixels and highdensity multilevel flashing storage display. All the operation must by chip microcontroller control, operation orders through serial munication interface (SPI or Microwire) into. Chip Digital voice recorder chips ISD4004 is the core part. ISD4004L16M series monolithic recording time 8 to 16 points, timbre. Chip adopt CMOS technology, contains the oscillator, microphone preamplifier, automatic gain control, prevent confusion filter, smoothing filter driver and EEPROM, speaker. The smallest recording system array microphones, horn, only two buttons, power and a few resistance capacitance. After recording operation in automatic into low power consumption, chip, low consumption 5uAe only saving pattern.ISD4004 series have only the recording controls and edge/level trigger two playback control. Unsegmented most Jane when peripheral lines, also can press for unit minimum long binations subsection, greatly improving the control flexibility chip adopt multilevel direct analogue storage patent technology, each sample direct stored in a single EEPROM unit in pieces (the very real, and can therefore reproduce music voice, natural, each effect, sampling frequency tones from to KHz, , only a faint of sound effects.Adopt AT89C52 single chip puter to realize my design. For my design speaking ISP technology can be very convenient flexible realize voice recording function of. This provides for realizing speech input the hardware conditions. Easy ISP technology is in a system programmable device to realize the pronunciation chip control. This control directly through the hardware circuit implementation ISP devices and tell the software interface program, use rise convenient and quick. ISD chips like the sound of two kinds of control ways (pin edge or level trigger control and micro controller serial munication interface control), it is easy to lose the storage of data, and the operation EEPROM convenience. This development environment support standard C language, and provides the voice recording, the C language program function, as long as the use of understanding function, can easily finish voice recording, all of these software development provided a convenient conditions. We are according to the design requirements in realizing the basis of basic recording function by AT89C52 single chip puter is muti_function integrated function expansion recording system functions. For example, use the AT89C52 single chip puter keyboard control function introduction feet add introduction digital tube or digital display function。 But also by LCD display character, digital image, such as Digital voice recorder design system in used to display a key function etc. This can make more plex record and playback system.The recording as an independent in the art, movies, TV shows, music production and various performances plays an important role. It is a bination of art and technology with dual characteristics of the working process, employees must master a certain physical acoustics, psychological and physiological acoustic and electric acoustics, indoor acoustics, music acoustic etc, also should understand knowledge, and music, understanding art in the recording process to rhythm and intonation, the accuracy of mistakes and shape the image can have strict art checks, such ability obtains in the recording sound has accurate audiovisual distribution, natural beautiful timbre and rational dynamic range of work.Digital voice recorder Related Functions1. Telephone recording function Telephone recording function refers to digital Digital voice recorder can over private telephone adapter, will Digital voice recorder connected with digital phone. Then, can ten ponent records iR words content, and good results, sound recording, almost no noise pure first this function especially useful for reporters telephone interview.2. Timed recordings Timing recording is according to the actual need to play, the predetermined began recording time, once meet conditions, Digital