單片機的語音存儲與重放的研究

電子機電論文編號:JD800  論文字數:5852,頁數:20

單片機的語音存儲與重放的研究
目錄
摘  要 I
Abstract II
1 引言 1
2 系統總體方案 1
3 系統硬件設計 3
3.1 單片機 3
3.2 SPCE061A音頻錄入與播放的外圍連接 4
3.3 SPCE061A與W29C040的硬件連接 5
3.4 按鍵部分 5
3.5 音頻錄入部分 6
3.6 音頻輸出部分 6
4 系統軟件設計 7
4.1向系統寫入語音數據 7
4.2從系統讀出語音數據并播放。 10
5 結束語 12
參考文獻 13
謝    辭 14
附    錄 16

                          
摘  要
本課題以凌陽SPCE061A單片機為主體，實現了語音的數字化存儲與回放，整個系統分為錄音，停止錄音和播放語音三種狀態，狀態的改變用按鍵S1S2S3控制。存儲器采用W29C040，音頻功放采用SPY0030，使用SPCE061A單片機自帶的LineIN輸入，性能良好的數字濾波器濾去音頻信號（300～3400HZ）頻段以外的信號，經AD轉換將音頻信號轉換為電信號，采用SACM-A2000的壓縮算法，將壓縮后的數據存儲在W29C040存儲器中。放音時再從W29C040讀取數據，利用凌陽SACM庫提供的DVR函數進行錄放，數模轉換后經過放大驅動喇叭。在8kHz的采樣頻率時，語音存儲時間可以達到4分多鐘，回放時語音失真小，音質良好。軟硬件的結合使該系統有合理的結構，性能指標基本達到要求。
關鍵詞：SPCE061A；W29C040；語音錄放

Single-chip voice storage and playback of the study
                    
Abstract
Sunplus SPCE061A subject to the single-chip microcomputer as the main body, a digital voice storage and playback, the whole system is divided into audio, stop, and playing three states, with key changes in the state of control S1S2S3. Memory used W29C040, audio power amplifier using SPY0030, the use of single-chip built-in SPCE061A input LineIN, good performance of the digital filters least squares audio signal (300 ~ 3400) outside the signal band, the audio signal AD conversion will be converted to electrical signals, using the SACM-A2000 compression algorithm to compress data stored in memory W29C040. Playback when the W29C040 to read data from the use of libraries provided by SACM Sunplus DVR playback function, digital-to-analog conversion drive through speakers to enlarge. At 8kHz sampling frequency, voice storage time of 4 minutes, when the voice playback distortion small, good sound quality. The combination of hardware and software so that the system has a reasonable structure, the basic performance indicators to meet the requirement.
Key words: SPCE061A; W29C040; Voice Recorder