基于单片机的语言存储与复读系统设计

下载后可任意编辑 毕 业 设 计 说 明 书题 目：基于单片机的语音存储与 复 读 系 统 设 计学 院：专 业：信 息 工 程年 级：学 生：学 号：指导老师：完成日期：下载后可任意编辑基于单片机的语音存储与复读系统设计摘 要：本设计实现了语音数据采集、存储和复读等功能。该系统通过话筒录入语音数据，然后经过放大电路、滤波电路和 A/D 转换器将模拟信号转换为数字信号，再通过单片机控制将信号储存在存储器中。复读时，再由单片机控制提取存储器中的数据，通过 D/A 转换器将数字信号转换为模拟信号，再通过滤波电路和功率放大电路将语音信号还原后在扬声器上输出语音。同时系统将按键与数码管、液晶显示模块配合，可以达到对系统的实时控制。关键词：语音存储，模数与数模转换，带通滤波，复读系统Abstract：This design has realized the voice acquisition, storage and playback and so on. The system uses the microphone input voice, Then the analog signal through the amplifying circuit, the filter circuit and the A/D switch, is transformed into the digital signal and is stored in the memory. When this system needs to playback, data is gotten from the memory, and it transforms into the analog signal through the D/A switch. Moreover through the filter circuit and the power amplifier, the voice signal can be recovered and output voice on the loudspeaker. Simultaneously the system realizes real-time control with key and nixie-tube，liquid-crystal display.Keywords ： Phonetic Memory ， D/A and A/D Converter ， Band-pass Filter，Playback SystemI下载后可任意编辑目 录1前言...................................................................11.1设计背景.........................................................11.2实施计划.........................................................22总体方案设计...........................................................32.1方案比较.........................................................32.1.1方案一......................................................32.1.2方案二.......