數字化语音存储与回放毕业论文.docVIP

东华理工大学长江学院 毕 业 设 计 题 目 数字化语音存储与回放系统 英文题目 Digital voice storageand playback system 学生姓名： 申请学位门类：工学学士 学 号： ********** 专 业： 电子信息工程 系 别： 机械与电子工程系 指导教师： 职称： 副教授 二零一三年六月摘 要 本文介绍一种单片机核心的数字语音存储和回放系统系统硬件和软件架构。微处理器AT89C51单片机同时外部RAM存储器，A/D转换器、D/A转换器等电路。 语音采集部分模数转换语音播放部分DAC0832的数模转换通过键盘接口电路人机交互微控制器中断查询模式快速响应关键要求采集存储和回放控制信号同时辅以带通滤波器增益功率放大电路外围电路对信号进行，以保证信息存储和回放高质量。为了实现系统控制和数据处理系统结构紧凑，录制和播放功能。系统噪声，语音播放。Abstract This paper presents a microcontroller as the core of digital voice storage and playback system and control unit system and its hardware and software architecture. AT89C51 microprocessor chip, and an external RAM memory expansion by A/D converter, D/A converters and other circuit components together. the voice storage mainly speech signals amplified by the amplifier is filtered by the filter frequencies other than waveform, and then by the analog to digital converter A/D converts the analog signal into a digital signal, and stored by the microcontroller to the external memory; speech playback mainly to stored digital signal read out by the microcontroller control, and after a digital-analog converter D/A converted into an analog signal, then the filter frequency external waveform and finally through the output amplifier the signal is amplified. Voice collecting part is ADC0832 analog to digital conversion, voice playback part adopts the DAC0832 digital-analog conversion. System through the keyboard interface circuit, HCI, microcontroller interrupt query patterns and rapid response component circuits. Key requirement is to collect, store and playback control signal, supplemented by band-pass filter circuit, the gain power amplifier circuit, the peripheral circuit, the signal processing circuit module, in order to ensure the high quality of information storage and playback. In order to implement the system of control of the speech signa