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基于单片机的数字化语音与存储系统
摘
要
语言在人类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丝毫不差地记录下来也是人们一直思考的问题。传统的磁带语音录放系统因其体积大、使用不便,在电子与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发展和基本结构,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,其中系统以单片机 89C51 为核心,选用由 1 片 62256 组成 RAM 阵列,作为语音的数字化信号的存储器件,将外部数据存储空间扩大至 32KB。利用 AM 和 DPCM 方法对数据进行压缩以加长存储时间。接着是详细介绍各个单元电路的组成以及功能,并对有关元器件参数选择做出详细分析,最后是写出调试方案。本文阐述了实用可靠的设计方案。
关键词: 关键词:单片机 89C51 62256 RAM AM DPCM
I
Based on SCM's digital voice storage and playback system
ABSTRACT
The language played the very important role in the history of human development. Its role and no less than upright walking and the use of tools. How can be not the least bit off humanity's language records is also the question which the people have pondered. Traditional voice tape recorders because of their larger systems, the use of inconvenience, receives many limits in the use of electronic and information processing. This article proposed small size, low power consumption of digital voice storage and playback system can replace it. The paper first introduces the development and basic structures of voice storage and playback system, then analyzes to determine the best design options, and designs the whole circuit. The system take MCU 89C51 as a core, chosen by one 62256 of RAM arrays, as pronunciation of the digital signals in the ponent,external data storage space will be expanded to 32 AM and DPCM method use of the pressed to lengthen the storage time. Then introduces ponents and the functions of the unit circuit, then makes a detailed analysis for ponents of the relevant parameters, and writes debugging programs finally. This paper presents a practical and reliable design.
Keywords: 89C51; 62256; RAM; AM; DPCM
II
南京工业大学本科生毕业设计(论文)
摘要…… I ABSTRACT …… II 第一章绪论…… 1
语音存储与回放系统概述……1 引言…… 1 语音存储回放技术的应用与发展…… 1 语音存储与回放系统的基本结构…… 2 本论文的主要工作…… 2
第二章方案论证及总体设计…