外文翻譯--SPCE016A的語音錄放.DOC

附錄中英文翻譯附錄1英文原稿TheSPCE061ApronunciationrecordsWhensoundrecording,transformsthroughtheA/Dswitchthepronunciationsignalthedigitalsignal,afterthecodestoresinthememory；Whenplayback,takesoutthedatafromthememoryandthedecoding,thenturnsthepronunciationsignaloutputaftertheD/Atransformation.TheSPCE061AA/Dswitchhas8channels,including1channelistheMIC-INinput,itspeciallyusesintothepronunciationsignalcarriesonthesampling.ThepronunciationsignaltransformstheelectricalsignalafterMic,byseparatesthestraightelectriccapacitytoseparatethedirectcomponent,theninputtoSPCE061Ainteriorpre-amplifier.SPCE061AinteriorautomaticgaincontrolelectriccircuitAGCcantrackthetonictrainsignallinglevelasnecessarywhich,thesurveillancepre-amplifieroutputs,whentheinputsignalincreases,theAGCelectriccircuitautomaticallyreducestheamplifierthegain；Whentheinputsignalreduces,theAGCelectriccircuitautomaticallyincreasestheamplifierthegain,inordertocausestoenterA/Dthesignaltomaintainatthebestlevel,alsomaycausetoreducetoslightly.TheA/DswitchentersthefrontpartofajacketkHzsamplingtotheinputtonictrainsignalling,anddeferstowillinsultthepositiveaudiofrequencycodeformtocarryonthecode,eachsecondwilltake16kBitsthememoryspace.Thesystemexpandedacapacityis1MbitsSRAMmemoryHM628128Asavesthepronunciationdata.Whenplayback,savesHM628128Ainthepronunciationdataordertotakeout,afterthedecoding,carriesontheD/Atransformationoutputbythe8kHzspeed,aftertheelectriccapacityfilter,restorestheprimitivepronunciationprofile,throughactuatesthespeakertoput.ACM-DVRhasthesoundrecordingandtheplaybackfunction,andusesSACM_A2000thealgorithm,whenthesoundrecordingpicks.the6Kmaterialrateandthe8Ksamplingrategainpronunciationresources,afterpassesthroughtheSACM_A2000compressiontosaveinexpansionSRAM628128A,recordsManYinhouautomaticallytostarttheplayback.InrecordingoutsideperiodfromtheADCchannelgainsoundrecordingmaterial,alsocarriesonitaftertheSACM_A2000formthecodetostoremeetsinSRAM；ButinbroadcastperiodgainsthepronunciationmaterialfromSRAM,carriesonthedecodingtoit,thenwaitsfortheseveranceservicesubroutinetosendoutittheDACchanneltorecordtheplaybacktoarrangethedecodingisdependsonthetransferstorehousefunctiontocomplete,doesnotneedustodesignthehardwareelectriccircuit.Insultedthepositivecompanytoprovidetherichstorehousefunction,wesolongastheunderstandingstorehousefunctionuse,couldwitheasecompletepronunciationrecordingandsendingout附錄2中文譯稿SPCE016A的語音錄放錄音時，通過A/D轉(zhuǎn)換器將語音信號轉(zhuǎn)換成數(shù)字信號，編碼后存入存儲器中；放音時，將數(shù)據(jù)從存儲器中取出并解碼，然后經(jīng)D/A轉(zhuǎn)換變成語音信號輸出。SPCE061A的A/D轉(zhuǎn)換器有8個通道，其中有1個通道是MIC-IN輸入，它專門用于對語音信號進(jìn)行采樣。語音信號經(jīng)Mic轉(zhuǎn)換成電信號，由隔直電容隔掉直流成分，然后輸入至SPCE061A內(nèi)部前置放大器。SPCE061A內(nèi)部自動增益控制電路AGC能隨時跟蹤、監(jiān)視前置放大器輸出的音頻信號電平，當(dāng)輸入信號增大時，AGC電路自動減小放大器的增益；當(dāng)輸入信號減小時，AGC電路自動增大放大器的增益，以便使進(jìn)入A/D的信號保持在最佳電平，又可使削波減至最小。A/D轉(zhuǎn)換器對輸入的音頻信號進(jìn)行8kHz采樣，并按照凌陽音頻編碼格式進(jìn)行編碼，每秒將占用16kBits的存儲器空間。系統(tǒng)擴(kuò)展了一塊容量為1Mbits的SRAM存儲器HM628128A來存儲語音數(shù)據(jù)。放音時，將HM628128A中存儲的語音數(shù)據(jù)順序取出，解碼后，以8kHz的速率進(jìn)行D/A轉(zhuǎn)換輸出，經(jīng)電容濾波后，恢復(fù)原始語音波形，通過驅(qū)動揚聲器放音。SACM-DVR具有錄音和放音功能，并采用SACM_A2000的算法，錄音時采用16K資料率及8K采樣率獲取語音資源，經(jīng)過SACM_A2000壓縮后存儲在擴(kuò)展的SRAM628128A里，錄滿音