DLNA 学习

[e-mail]2Review:RequirementsfortheWirelessHNReview:RequirementsfortheWirelessHNzSupportforQoSofrealtimestreamingofA/VcontentzNetbitrateover30Mbits/s(DigitalVideoCamcorder)zAdHocNetworking(DirectMode)zSelfconfigurable(nonetworkorfrequencyplanning)zSecurityandPrivacyzConnectiontowired1394devicesandclusters(bridge)zPlugandPlayzLowPowerforMobileTerminalszInteroperabilityofdevicesfromdifferentmanufacturerszEnoughspectrumforhighlypopulatedurbanareasPDF文件使用pdfFactoryPro试用版本创建:Open,Fair,InteroperableUnderConsiderationinDHWGReview:DHWGFrameworkRequired:JPEG,LPCM,MPEG2Optional:GIF,TIFF,AAC,AC-3,ATRAC3plus,MP3,WMA9,MPEG1,MPEG4,WMV9,PNGDRM/CPTechnologiesIP(IPv4)UPnPArchitectureEthernetUPnPDCP(AVv1)HTTPWired802.3uWireless802.11a/b/gFuturePotentialTechnologiesJPEG2K,MPEG4DHWGMediaFormatsWireless802.11e/iPDF文件使用pdfFactoryPro试用版本创建–VideoThedevicesdepictedinthesescenariosareforillustrativepurposesonlyandhavenorelationtospecificproductsplannedbyanymanufacturer.Server6DigitalHomeScenario–AudioThedevicesdepictedinthesescenariosareforillustrativepurposesonlyandhavenorelationtospecificproductsplannedbyanymanufacturer.ServerPDF文件使用pdfFactoryPro试用版本创建–ImagesThedevicesdepictedinthesescenariosareforillustrativepurposesonlyandhavenorelationtospecificproductsplannedbyanymanufacturer.8ProblemStatementzNetworkdevicesaredifficulttoconfigureyDHCP,StaticIP,etc.zConsumerswantautomaticsetupandconfigurationyPnPforthenetworkzDevicesfromdifferentmanufacturersshouldbeinteroperableyNoproprietarysolutionszDevicesshouldbeunifymanageyUniversalRemoteControlPDF文件使用pdfFactoryPro试用版本创建数字产品多样化，使用和设置复杂z数字产品工业标准繁多，各种家电网络互通和兼容性差z各种数字产品厂商对数字家庭的支持甚少，只有少数大公司，着手这方面的支持，比如Intel,Microsoft，SONY，NOKIA等10DLNAz就目前而言，比较大的一个数字家庭的工业组织是DLNA(DigitalLivingNetworkAlliance)。基于现有公开通用的工业标准（UDP，TCP，HTTP，XML，UPnP以及各种媒体格式标准）联合工业界各大电子、计算机设备及软件产品厂商制定一个指导方针确保各种设备产品的互操作性（interoperability）z制定一个基于标准的互操作性框架，这个框架定义了物理媒体、网络传输、媒体格式、流协议、数字版权保护等一系列规范。12Cont.z基于互操作框架的产品大致分为两大类：yDMS(DigitalMediaServer)x媒体获取、存放、刻录、点播服务yDMP(DigitalMediaPlayer)x媒体播放、点播界面、媒体显示等PDF文件使用pdfFactoryPro试用版本创建•Advancedset-topboxes(STB)•Personalvideorecorders(PVR)•PCs•Stereoandhometheaterswithharddiskdrivers(forexample,musicservers)•Broadcasttuners•Videoandimagingcapturedevices,suchascamerasandcamcorders•Multimediamobilephones14Cont.DMP•TVmonitors•Stereoandhometheaters•Printers•PDAs•Multimediamobilephones•Wirelessmonitors•GameconsolesPDF文件使用pdfFactoryPro试用版本创建(1)ContentSharingFrameworkNetworking&Connectivity(IPv4,Ethernet,802.11)zHowdevicesphysicallyconnecttogetherandcommunicate.UseIPv6infuture.DeviceDiscovery&Control(UPnPDeviceArch)zHowdevicesdiscoverandcontroleachotherMediaManagement(UPnPAV)zHowmediacontentisidentified,managed,anddistributedMediaTransport(HTTP)zHowmediacontentistransferredMediaFormats(Images,Audio,AV)zHowmediacontentisencodedandidentifiedforinteroperability,Required:JPEG,LPCM,MPEG2.Optional:PNG,GIF,TIFF,MP3,WMA9,AC-3,AAC,ATRAC3plus,MPEG1,MPEG4,WMV9,JPEG2KDRM/CPTechnologieszHowmediacontentisprotected(UnderconsiderationinDLNA)PDF文件使用pdfFactoryPro试用版本创建(2)zNetworking&Connectivityy解决物理设备连通问题y关键技术:Ethernet,802.11,IPv4协议栈，IPv6协议栈y要求：xTCP/IPstackmustincludeIPv4,TCP,UDP,DHCP,Auto-IP,ARP,andICMPclientcomponentsx10BASE-Tand100BASE-TXwithauto-negotiationandaRJ45connectiontothenetworkisrequired.1000BASE-Tisrecommended20DLNAInteroperabilityFramework(3)zDeviceDiscovery&Controly解决设备发现和互操作问题，实现所谓的“设备零配置”。x比如通过电视播放PC媒体的时候，电视设备需要“自动知道”PC媒体服务器的存在，以及其能提供何种服务y关键技术：xUPnP(UniversalPlugandPlay)v1.0DeviceArchitecture，XMLSOAP(SimpleObjectAccessProtocol)，HTTPy要求：x标准化的UPnP设备体系结构标准x非常简单的实现，必须适用于一般家用嵌入式设备x使用SSDP(SimpleServiceDiscoveryProtocol)和GENA(GeneralEventNotificationArchitecture)消息协议PDF文件使用pdfFactoryPro试用版本创建™DeviceArchite