基于dsp的企业网络电话终端设计

《基于dsp的企业网络电话终端设计》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、AbstractAtpresent，themajorityofourenterpriseshasadoptedstand-alonecomputernetwork，telephonecommunicationnetwork，program—controlledschedulingsystemandothernetworksorsystems．Networkconstructionandoperationrequiresalotofequipmentcosts，linecharges，maintenanceandrepaircosts，andalargenumberofwir

2、eswhichwillbeinconveniencetotheenvironment．Localcomputernetworkcanreachtol000Mbit／s，butitsrichbandwidthresourceshasnotbeenfullyutilized，whichresultsinresourceswaste．ThearticledevelopsaIPphoneterminalthatisbelongtotelephonecommunicationsystemthatisbasedoncomputernetwork．ProposesDSP-baseddes

3、ignprogram；aroundTMS320VC5402DSPdesignstheIPphoneterminalhardwarecircuit，whichincludesmaincontrolcircuit，logicinterfacecircuit，extendedmemory,PCMcodeccircuit，Ethemetinterfacecircuit，microcontrolleranditsinterfacecircuitandSOon；proposesanoptimizedCt．729voicecompressionalgorithm，makingtheter

4、minalachievethecompressionofvoicesignals；optimizestheMGCPcallcontrolprotocol，proposesWMGCPcallcontrolprotocol；usesClanguagetorealizetheterminalsoftwareaswellascommunicationsoftwarebasedontheUDP／IPprotocolandachievestelephonecommunicationfunctionsbasedonWMGCPcallcontrolprotocol；completedexp

5、erimentalprototypesandconductedthemintoexperimentandtheresultachievedthedesignrequirement．Theterminalhasadvancedtechnology,goodperformanceandlowcost．Withtheterminals，theenterprisenetworkcommunicationsystemcanrealizespeakerphonecallandphoneintercomfunctions，andthreewayscallingmethods一-singl

6、ecall，groupcall，allcall．Savesalotofequipmentconstructioncosts，linefeesandengineeringfees，improvesthecomputernetworkresourceutilization．NotonlyCanbeappliedtoenterprises，butalsotoeducation，scienceandtechnology,electricalindustry,bankandpublicsecuritysystems，Canpromotetheapplicationofsignific

7、antspeechcompressionalgorithm；callcontrol目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．1国内外网络电话通信现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．2研究的目的和意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．3课题的主要研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．2第二章企业网络电话通信系统及网络电话终端设计方案⋯⋯⋯⋯⋯⋯⋯⋯．．32．1企业网络电话通信系统设计方案⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．32．2网络电