1、 I 基于单片机的语音存储与回放系统设计 摘 要 语言在人类的发展史中起到了至关重要的作用 ,它的作用并不亚于直 立行走和工具的使用,怎样能把人类的语言毫不差地记录下来也是人们一直 思的问题 。 传统的磁带语音录放系统因其体积大 , 使用不便, 在电子信息 处 理的使用中受到许多限制。本文提出的体积小巧,功耗低的数字化语音存储 与回放系统将完全可以替代它。 论文首先介绍了语音存储与回放系统的总体设计方案,系统要实现的功 能,然后通过分析比较选择最佳设计方案,并完成整个系统电路的设计。本 文利用单片机 AT89C52 控制 ISD4004 语音芯片来实现语音的录制和播放。 ISD4004 语音芯
2、片无须 A/D 转换和压缩就可以直接储存,没有转换误差。具 有可多次重复录放、存储时间长的功能使用时不需扩充存储器,所需外围 电路简单。本文在简单分析 ISD4004 单片语音芯片工作原理的基础上,通过 系统功能模块各部分的连接及软硬件设计,实现了数字化语音的存储和回 放通过外部设备的扩展,可以提高产品的应用领域。 关键词:AT89C52 单片机,ISD4004,语音录放,LM386 II MICROCONTROLLER BASED VOICE STORAGE AND PLAYBACK SYSTEM ABSTRACT Language has played a vital role in hu
3、man history, which, not less than the significant of upright walking and the use of tools. However, it is a vital problem of how can human languages be recorded. Because of their bulky, inconvenient to use, traditional voice recording tape systems have many restrictions. In contrast, one digital aud
4、io storage and playback system which is small in size, low power in consumption will completely replace it. To begin with, this article introduces the overall designation of the voice storage and playback system, the functions to be achieved, and then selects the best design through analyze and comparison, and complete the system circuit design in the end. In this design, AT89C52 microcontroller chip is used to control the ISD4004 voice recording and playback of voice. ISD4004 voice chip ca