一种微格教室语音控制系统.doc
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摘 要
本设计主要在于设计一种微格教室语音控制系统,该系统主要运用89C51单片机作为主控芯片,运用ISD1720作为录音播放芯片,同时安排有显示电路。其功能包括了定时,显示,和录放。在声音的播放处理中,添加了4阶巴特沃思低通滤波器,使播放的声音更加清晰。从而提高了电路系统的整体性能。同时该系统运用芯片ISD1720的独立模式,而非SPI模式。这样使得编程变得简单,性能也比较优越,提升了该系统的实用性。
关键词 : 89C51 ,ISD1720,独立模式 ,巴特沃思滤波器
Micro-controller Development of classroom lectures and Design
Abstract
The main design is the design of a micro-class voice-control system using 89C51 single-chip microcomputer as the main control chip, the use of audio players as ISD1720 chip, at the same time showing the circuit arrangement. Its features include a timer, display, and playback. Player in the voice processing, the addition of 4-order Butterworth low-pass filter, so that the voices of players become clearer. Thus enhancing the overall performance of the circuit system. At the same time, the use of the system independent of the ISD1720 chip mode, rather than the SPI mode. This allows easy programming, superior performance and enhance the practicality of the system.
Keywords: 89C51 , ISD1720 , Butterworth filter, Stand-alone mode
目 录
1 引言………………………………………………………………………………1
1.1 选题背景及现状………………………………………………………………1
1.2设计思想………………………………………………………………………2
1.3论文安排………………………………………………………………………2
2单片机和语音芯片选取……………………………………………………………3
2.1微处理器选取…………………………………………………………………3
2.2 ISD1720结构…………………………………………………………………4
3 定时语音提示系统硬件电路设计…………………………………………………7
3.1 定时语音提示系统的组成……………………………………………………7
3.2 定时语音提示系统硬件电路………………………………………………7
3.3时钟复位电路…………………………………………………………………7
3.4语音电路设计…………………………………………………………………8
3.5电源电路设计…………………………………………………………………10
3.6串口4位数码显示电路………………………………………………………11
3.7滤波电路………………………………………………………………………12
3.8语音输出电路设计……………………………………………………………13
3.9系统软件设计…………………………………………………………………14
4结论…………………………………………………………………………15
致谢…………………………………………………………………………………15
参考文献……………………………………………………………………………16
附录一………………………………………………………………………………17
程序清单……………………………………………………………………………18
1.引言
1.1 选题背景及现状
随着经济的进步,大规模集成技术的高度发展和计算机技术的飞速前进,推动着语音技术的发展。在数字音频技术和多媒体技术迅速发展的今天,传统语音录放电路设计十分复杂,开发工具十分昂贵,语音录制及软件编制工作量巨大
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