外文翻译--SPCE016A的语音录放.DOC

附录中英文翻译附录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附录2中文译稿SPCE016A的语音录放录音时，通过A/D转换器将语音信号转换成数字信号，编码后存入存储器中；放音时，将数据从存储器中取出并解码，然后经D/A转换变成语音信号输出。SPCE061A的A/D转换器有8个通道，其中有1个通道是MIC-IN输入，它专门用于对语音信号进行采样。语音信号经Mic转换成电信号，由隔直电容隔掉直流成分，然后输入至SPCE061A内部前置放大器。SPCE061A内部自动增益控制电路AGC能随时跟踪、监视前置放大器输出的音频信号电平，当输入信号增大时，AGC电路自动减小放大器的增益；当输入信号减小时，AGC电路自动增大放大器的增益，以便使进入A/D的信号保持在最佳电平，又可使削波减至最小。A/D转换器对输入的音频信号进行8kHz采样，并按照凌阳音频编码格式进行编码，每秒将占用16kBits的存储器空间。系统扩展了一块容量为1Mbits的SRAM存储器HM628128A来存储语音数据。放音时，将HM628128A中存储的语音数据顺序取出，解码后，以8kHz的速率进行D/A转换输出，经电容滤波后，恢复原始语音波形，通过驱动扬声器放音。SACM-DVR具有录音和放音功能，并采用SACM_A2000的算法，录音时采用16K资料率及8K采样率获取语音资源，经过SACM_A2000压缩后存储在扩展的SRAM628128A里，录满音