基于单片机数码录音与播放系统方案.doc

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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

ABSTRACT
Withtheincreasingprosperityoftheconsumers’electronicsandthevoiceprocessingtechnologyinthecontinuousapplicationoftheindustrial,transportation,communications,thedemandofproductswhicharehavingthefunctionofdigitalrecordingandplaybackisconstantlyincreasing.Inordertobettersatisfypeople’sdailylifeandwork,IchooseSunplusMCUasthecore,usingamicrophonetoreceivevoicesignalsanduseamemorytostorethevoiceinformationrecordingandplayback.Thesystembasedonthefeatureappliesinthelongerrecordingoccasions.suchastheself-recordingvoiceprompts,thetemperaturesensingstoreplaybacksystemsorotherprograms.
ThedesignofthehardwarecircuitincludesaMICrecordingcircuit,DACplaybackcircuit,keycircuit,theresetandclockcircuit,theexternalW29C040storageexpansioncircuit.Thevoicesignalpassingthroughthebuildofcapacitors,resistors,processinginthepreamplifierandtheinternalintegrationoftheautomaticgain(AGC)usesastherecordingpart;AndDACplaybackpart,goesthroughintegratedamplifierSPY0030A,thenconnectswithaspeaker,realizesthevoicerecordingofthefunction.Thechipsizeissmall,highlyintegrated,extensible,andstronginterrupthandling.

[Keywords]SunplusW29C040storagedigitalrecordingandplayback

目录

TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc325474434"前言PAGEREF_Toc325474434\h1
HYPERLINK\l"_Toc325474435"第一章单片机的数码录音与播放的概述PAGEREF_Toc325474435\h2
HYPERLINK\l"_Toc325474436"第一节录放音的背景和意义PAGEREF_Toc325474436\h2
HYPERLINK\l"_Toc325474437"第二节录放音的国外研究PAGEREF_Toc325474437\h3
HYPERLINK\l"_Toc325474438"第三节录放音的发展前景PAGEREF_Toc325474438\h3
HYPERLINK\l"_Toc325474439"第四节录放音的设计思想PAGEREF_Toc325474439\h4
HYPERLINK\l"_T