【正文】 發(fā)展數(shù)字語音錄放是指利用數(shù)字技術(shù)對語音信號進(jìn)行采集、處理、并且在一定存儲設(shè)備中進(jìn)行存儲，并可在需要時進(jìn)行輸出的過程。第 1 章 緒論 導(dǎo)言目前基于單片微機(jī)的語音系統(tǒng)的應(yīng)用越來越廣泛，如電腦語音鐘、語音型數(shù)字萬用表、手機(jī)話費(fèi)查詢系統(tǒng)、排隊(duì)機(jī)、監(jiān)控系統(tǒng)語音報(bào)警以及公共汽車報(bào)站器等等。當(dāng)使用 PC機(jī)的時候，由于它的體積龐大，耗電高，造價也高，并且在某些情況下系統(tǒng)的穩(wěn)定性得不到保證所以用PC機(jī)來實(shí)現(xiàn)前述的各項(xiàng)功能和操作，就受到了一定的限制。采用數(shù)字錄音技術(shù)，有較高的效率和自動化程度，錄音時間也長，并可將信息長期保存于存儲介質(zhì)中，同時對語音信息進(jìn)行編輯整理非常方便，可快速查找。把語音生成技術(shù)用于工業(yè)監(jiān)控系統(tǒng)、自動應(yīng)答系統(tǒng)、多媒體查詢系統(tǒng)、智能化儀表、辦公自動化系統(tǒng)或家用電氣產(chǎn)品中，使它們具有語音輸出功能，使之能在適當(dāng)?shù)臅r候用語音實(shí)時報(bào)告系統(tǒng)的工作狀態(tài)、警告信息、提示信息或相關(guān)的解釋說明等，無疑在提高人機(jī)通信能力、減少對錯誤處理的遺漏、提高系統(tǒng)性能、降低人們的工作強(qiáng)度等方面都有極大的好處。 系統(tǒng)硬件電路簡單，調(diào)試方便，性價比高，實(shí)用性強(qiáng)?；趩纹瑱C(jī)的語音錄放軟件設(shè)計(jì)摘 要目前，語音合成、語音識別、語音存儲和回放技術(shù)的應(yīng)用越來越廣泛，盡管利用一般的單片機(jī)測控系統(tǒng)中都有的硬件電路（如 A/D、 D/A、存儲器等）能完成語音信號的數(shù)字化處理，但是功能比較單一、且效果不是很好。本文采用單片機(jī) AT89C52 與語音芯片 ISD2560 組成的語音存儲系統(tǒng)，實(shí)現(xiàn)了語音的錄取、回放，同時使用 Matlab 軟件進(jìn)行濾波和頻譜分析，可實(shí)現(xiàn)簡單的語音錄放功能，且輸出語音信號音質(zhì)較好。關(guān)鍵詞：語音錄放系統(tǒng)；濾波；頻譜分析Software Design of Voicerecording and Playing Based on MicrocontrollerAbstract At present, speech synthesis, speech recognition, voice storage and playback technology is more widely applied, despite the use of general monitoring and control system in the SCM have the hardware circuit (such as the A / D, D / A, memory, etc.) can be pleted Voice of the digital signal processing, but a single function of parison, and the effect is not very good. In this paper, with the voice chip ISD2560 AT89C52 microcontroller consisting of voice storage system to achieve the acceptance speech, playback while using Matlab software to filter and spectrum analysis, simple voice recording function, and good quality output speech signal.System hardware circuit is simple, easy adjustment, costeffective and practical.Key words: Voice Recording and Playing System；Filter；Spectrum Analysis目 錄引 言 ............................................................................................................................1第 1 章 緒論 ..................................................................................................................2 導(dǎo)言 .........................................................................................................................2 數(shù)字語音錄放系統(tǒng)的發(fā)展 .....................................................................................2第 2 章 數(shù)字錄音的基本原理 ......................................................................................3 模擬音頻和數(shù)字音頻 ..............................................................................................3 數(shù)字音頻技術(shù)的概念 ..............................................................................................3 語音信號的數(shù)字化 ..................................................................................................4 取樣 ...............................................................................................................4 量化 ...............................................................................................................5 濾波和頻譜分析 .....................................................................................................6 采樣定理 .......................................................................................................6 采樣頻率 .......................................................................................................6 語音的錄入與打開 .......................................................................................6 時域信號的 FFT 分析 ..................................................................................7 數(shù)字濾波器設(shè)計(jì)原理 .................................................................................7第 3 章 硬件系統(tǒng)的設(shè)計(jì) ..............................................................................................8 總體方案論證 ..........................................................................................................8 系統(tǒng)硬件電路設(shè)計(jì) ..................................................................................................8 器件選擇 ..................................................................................................................9 單片機(jī) AT89C52...........................................................................................9 ISD2560 語音芯片 ......................................................................................10第 4 張 系統(tǒng)軟件設(shè)計(jì) ................................................................................................13 系統(tǒng)軟件總流程圖 ...............................................................................................13 AT89C52 單片機(jī)對 ISD2560 控制的軟件設(shè)計(jì) ................................................13 錄音軟件設(shè)計(jì) .............................................................................................13 放音軟件設(shè)計(jì) .............................................................................................15 濾波和頻譜分析 ....................................................................................................18 圖形用戶界面概念 .....................................................................................18 圖形用戶界面設(shè)計(jì) .....................................................................................18 語音信號的讀入與打開 .............................................................................18 語音信號的定點(diǎn)分析 .................................................................................19致 謝 ..........................................................................................................................24參考文獻(xiàn) ......................................................................................................................25附錄 A 系統(tǒng)總電路圖 ................................................................................................26附錄 B 外文文獻(xiàn) ........................................................................................................27附錄 C 主要參考文獻(xiàn)題錄及其摘要 ........................................................................31附錄 D 主程序清單 ....................................................................................................33插圖清單圖 21 數(shù)字錄音系統(tǒng)圖 .....................................................................................................10 圖 22 數(shù)字放音系統(tǒng)圖............