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數(shù)字化語音存儲(chǔ)與回放系統(tǒng)設(shè)計(jì).doc

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數(shù)字化語音存儲(chǔ)與回放系統(tǒng)設(shè)計(jì),目 錄摘要..................................................2abstract..................................................2  引言..............................
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數(shù)字化語音存儲(chǔ)與回放系統(tǒng)設(shè)計(jì)

目   錄
摘要..................................................2
Abstract..................................................2
  引言..................................................................3
1 系統(tǒng)的方案論證..........................................................3
  2 系統(tǒng)硬件設(shè)計(jì).....................................................4
2.1拾音器......................................................5
2.2 放大器設(shè)計(jì)...................................................6
2.3 可調(diào)穩(wěn)壓電源的設(shè)計(jì)...................................................8
2.4 AT89C51介紹.....................................................8
2.5 D/A A/D轉(zhuǎn)換器.....................................................10
2.5.1 D/A轉(zhuǎn)換器DAC0832的介紹............................................10
2.5.2 A/D轉(zhuǎn)換器DA574的介紹.............................................11
2.6存儲(chǔ)器的選擇...........................................12
2.7鍵盤的設(shè)定.........................................................13
3 模塊接口原理.....................................................13
3.1 AT89C51和AD574的接口原理...........................................13
3.2 DAC0832與單片機(jī)的接口原理............................................15
  3.3存儲(chǔ)芯片與單片機(jī)的接口原理...........................................16
  4 系統(tǒng)接口總圖......................................................16
  3.5 系統(tǒng)的校正......................................................17
  4 軟件設(shè)計(jì)......................................................19
  5 結(jié)論.........................................................19
  答謝..................................................................20
  參考文獻(xiàn)..............................................................20
  附錄:總程序............................................................  21

數(shù)字化語音存儲(chǔ)與回放系統(tǒng)的設(shè)計(jì)

摘要:  本文介紹的數(shù)字化語音存儲(chǔ)與回放系統(tǒng)將完全可以替代傳統(tǒng)的磁帶語音錄放系統(tǒng)。其基本原理是對(duì)語音的錄音與放音的數(shù)字化控制。為了增加語音存儲(chǔ)時(shí)間,提高存儲(chǔ)器的利用率,采用了非失真壓縮算法對(duì)語音信號(hào)進(jìn)行壓縮后再存儲(chǔ),而在回放時(shí)再進(jìn)行解壓縮,同時(shí), 該系統(tǒng)對(duì)語音信號(hào)分別采用了數(shù)據(jù)采集直存直取,欠抽樣采樣和自相似增量調(diào)制等三種方法,完成了對(duì)語音信號(hào)存儲(chǔ)與回放。
關(guān)鍵詞:數(shù)字化存儲(chǔ),回放,數(shù)字濾波,采樣,模/數(shù)轉(zhuǎn)換,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