数字化语音存储与回放系统设计.doc

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数字化语音存储与回放系统设计,目 录摘要..................................................2abstract..................................................2  引言..............................
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数字化语音存储与回放系统设计

目   录
摘要..................................................2
Abstract..................................................2
  引言..................................................................3
1 系统的方案论证..........................................................3
  2 系统硬件设计.....................................................4
2.1拾音器......................................................5
2.2 放大器设计...................................................6
2.3 可调稳压电源的设计...................................................8
2.4 AT89C51介绍.....................................................8
2.5 D/A A/D转换器.....................................................10
2.5.1 D/A转换器DAC0832的介绍............................................10
2.5.2 A/D转换器DA574的介绍.............................................11
2.6存储器的选择...........................................12
2.7键盘的设定.........................................................13
3 模块接口原理.....................................................13
3.1 AT89C51和AD574的接口原理...........................................13
3.2 DAC0832与单片机的接口原理............................................15
  3.3存储芯片与单片机的接口原理...........................................16
  4 系统接口总图......................................................16
  3.5 系统的校正......................................................17
  4 软件设计......................................................19
  5 结论.........................................................19
  答谢..................................................................20
  参考文献..............................................................20
  附录:总程序............................................................  21

数字化语音存储与回放系统的设计

摘要:  本文介绍的数字化语音存储与回放系统将完全可以替代传统的磁带语音录放系统。其基本原理是对语音的录音与放音的数字化控制。为了增加语音存储时间,提高存储器的利用率,采用了非失真压缩算法对语音信号进行压缩后再存储,而在回放时再进行解压缩,同时, 该系统对语音信号分别采用了数据采集直存直取,欠抽样采样和自相似增量调制等三种方法,完成了对语音信号存储与回放。
关键词:数字化存储,回放,数字滤波,采样,模/数转换,校正

Design of Digit-Voice Recorder and Playback System
Electronics and Information Science and Technology
          
Abstract:  The digit-voice recorder and playback system that this paper introduces can be substituted for traditional tape record system. Its basic prineple is the digital control for the recowde and playback of voice. For increase,to increase pronunciation store time and raise utilization ratio of the memory,it adopts non-distorted to compress algorithm before storing to pronunciation signal and to decompress in the playback.At the same time, system the system introduces the direct store & access of data collection,and AGC on acoustic signal respectively to store and playback completely.
Keywords: Digital store,Playback, Digitalfilter,Sample, A/D Convert,Correct ing