I 基于单片机的数码录音与播放系统学生：指导教师：内容摘要： 随着语音处理技术在工业、 交通、通信等不断应用和消费类电子不断繁荣，人们对具有数码录音与播放功能的产品的需求也在不断的增加。为了更好的满足人们日常生活、工作，选用凌阳单片机为核心，通过麦克风接收语音信号，使用存储器来存储语音信息从而实现录音和播放功能。基于该功能的系统应用于录音较长的场合。如自录语音提示、温度检测储存播放系统等方案。本次设计的硬件电路主要包括MIC 录音电路、 DAC 放音电路、按键电路、复位与时钟电路、外部W29C040 储存器扩展电路组成。把语音信号经过搭建电容、电阻，送入前置放大器和内部集成的自动增益（AGC）处理，作为录音部分；而 DAC 放音部分，经过语音集成放大器SPY0030A 放大，再接上扬声器，实现了语音的录放功能。芯片体积小、集成度高、易扩展、中断处理能力强等特点。关键词： 凌阳单片机W29C040 储存器数码录音与播放II The digital voice recording and playing system based on SCM Abstract: With speech processing technology in the industrial application such as traffic communication and consumer electronics rising prosperity, people on the demand of the products with digital recording and playback functions have been increased in order to better meet People's Daily life work, choose sunplus singlechip as the core, through a microphone receives the voice signal, using the memory to store the voice information so as to realize the recording and playback functions based on the function of the system is applied in the tape longer occasions such as the recorded voice prompt temperature detection store broadcast system . The design of the hardware circuit mainly includes the MIC recording DAC playback circuit reset button circuit and clock circuit external W29C040 storage extended circuit of the speech signal after structures, capacitance resistance, into the preamplifier and internal integration automatic gain (AGC) processing, as the recording part; ...
