(页数:41 字数:16774) 摘 要: 当今，计算机技术带来了科研和生产的许多重大飞跃，微型计算机的应用已经渗透到生产、生活的各个方面。单片微型计算机简称单片微机或单片机，又称为微控制器。它体积小、价廉、功能强，适用范围越来越宽。单片机在工业控制、自动检测、智能仪器、家用电器等领域的应用尤其突出。
本课题以凌阳SPCE061A单片机为主体，实现了语音的数字化存储与回放，整个系统分为录音、停止、和放音三种状态，状态的改变用按键K1\K2\K3控制。存储器采用SPR4096，放大器采用NE5532，使用SPCE061A单片机自带的LineIN输入，性能良好的数字滤波器滤去音频信号（300~3400）频段以外的信号，经AD转换将音频信号转换为电信号，采用SACM-A2000的压缩算法，将压缩后的数据存储在SPR4096存储器中。放音时再从SPR4096读取数据，利用凌阳SACM库提供的DVR函数进行录放，数模转换后经过放大驱动喇叭。在8kHz的采样频率时，语音存储时间可以达到10s以上，回放时语音失真小，音质良好。软硬件的结合使该系统有合理的结构，性能指标基本达到要求。

关键词：SPCE061A SPR4096 数字滤波　压缩编码　语音
ABSTRACT

Nowadays, computer science has brought about a lot of achievements in scientific research and in industry. The application of microcomputer has penetrated to all aspects of life and industry. Microcomputer is called singlechip for shot, or controller. Because of its small bulk, low price, strong function, the microcomputer is used more and more, especially in the industrial control, automatic detect, intelligent instrument, apparatus and so on.
This task is based on the microcomputer SPCE061A of Sunplus. Digital memorization of voice and playback of voice are all realized in this system. All the system is composed of three states: record, playback and halt. The keys K1\K2\K3 are in charge of the change of the states. SPR4096 is used as the data memorizer. The microcomputer SPCE061A offers micin input. Digital filter which performance is all right is used to wipe off the noise. Audio frequency single is switched to the electric single via the conversion of AD. After amplified, it drives the trumpet. Voice memorization time can reach more than 10s at 8kHz sampling frequency. Quality of the playback voice is fine and distortion is low. Both software and hardware were combined together so that the system can work well. The tested data shows that the system is reliable and the performance of the system up to the design requirements.

Key words: SPCE061A ; SPR4096; digital filter;

目录

第一章 SPCE061A单片机简介
第二章 61板组成及自检
第三章 硬件电路设计
第四章 软件系统设计
第五章 总结