基于android的家用网络播放设备的设计与实现

研究生姓名：学号：指导教师姓名、职称：学科、专业名称：研究方向：I摘要如今，随着数字技术的高速发展和广泛运用，越来越多的数字电子设备参与到人们的生活当中，原来的模拟电器也已开始更新换代，使得人们的生活逐渐地被数字化。还有，我国社会经济全面向好发展，人民生活水平的不断提高促进了家用电子设备的需求和消费的增长，以满足人们轻松生活和娱乐的渴望。而且，作为最普遍和传统的娱乐方式之一，电视在人们的生活中仍然具有举足轻重的地位。再来，数字化、网络化、互动化的流行趋势愈加明显，并渐渐融入到包括电视媒体在内的家庭娱乐领域中来，不同种类的娱乐媒体在同一趋势的影响下也开始互相的借鉴甚至融合。。目前已经有一些适合商用的流媒体服务器，但是对家用的流媒体终端还没有一个统一的解决方案，因此对家用网络播放设备的研究显得很有意义。家用网络播放设备是指包括数字电视机顶盒、IPTV机顶盒、HTPC、数字录像机等在内的用以连接电视机实现包括数字音视频广播和点播、上网、通讯、游戏等家庭多媒体娱乐的数字终端设备。本课题研究的家用网络播放设备采用IPTV机顶盒+电视机的接收方式，这种形式的IPTV终端兼顾了个人电脑和电视机的功能，可以直接利用家庭中已有的电视终端来扩展业务，同时也符合中国国情，目前是信息行业发展的重点。方案采用的TI公司生产的OMAP3530开发板，8900内核涵盖ARM+DSP处理器，内置3D图形处理器，采用了时下最流行稳定的GoogleAndroid2.2操作系统，具有较强的解复用和音视频流解码功能,为IPTV视频点播终端的实现提供了良好的软硬件基础。论文深入讨论了基于Android的家用网络播放终端的技术理论和核心技术的实现。首先从总体上介绍IPTV的发展状况；同时把本课题研究所涉及到的技术理论做了简要的说明，包括IPTV机顶盒技术、流媒体技术、RTP/RTCP/RTSP/SDP协议及MPEG-2传输流；重点阐述了IPTV视频点播终端的系统设计：流媒体客户端与服务器的交互流程，音视频的解码播放和消息驱动机制；实现了一种能提供良好视频质量和友好人机交互方式的基本视频点播终端。关键词关键词关键词关键词：：：：IPTV视频点播机顶盒流媒体IAbstractNow,withtherapiddevelopmentofdigitaltechnologyandthewidespreaduseofdigitalelectronicdevicesmoreandmoreinvolvedinpeople'sdailylives,theoriginalanalogelectricalreplacementhasbegun,makingpeople'slivesgraduallybeingdigitized.Also,thebetterouroverallsocio-economicdevelopment,risinglivingstandardsforthehomeelectronicsdemandandconsumptiongrowth,tomeetpeople'sdesireforeasylivingandentertainment.Moreover,asthemostcommonandtraditionalformsofentertainment,televisionisstillinpeople'slivesplaysadecisiverole.Comeback,digital,networked,interactivetrendsbecomemoreobvious,andgettingintothemedia,includingtelevision,includingthehomeentertainmentfield,thedifferenttypesofentertainmentmediaundertheinfluenceofthesametrendshavebeguntolearnfromeachotherandevenintegration..Therearealreadysomeofthestreamingmediaserverforbusiness,butthehomeofstreamingmediaisnotaunifiedendsolution,networkplaybackdevicesonthehomestudy,itwassignificant.Playhomenetworkdevices,includingdigitalTVset-topboxesis,IPTVset-topbox,HTPC,digitalvideorecorders,etc.,toconnecttheTVtoachieve,includingdigitalaudioandvideobroadcastsandon-demand,Internet,communications,games,multimediaentertainment,digitalhometerminalequipment.TheresearchofthehomenetworkusingIPTVset-topplaybackdevicetoreceivetheTVmode,thisformofIPTVterminalboththePCandTVfunctions,canusetheirexistingTVterminaltoexpanditsbusiness,butalsomeetChina'snationalconditions,thecurrentfocusoftheinformationindustry.ProgramusedintheproductionofTI'sOMAP3530developmentboard,covertheARMDSPcore8900processor,built-in3Dgraphicsprocessor,usingthemostpopularstableofGoogleAndroid2.2operatingsystem,withastrongde-multiplexinganddecodingaudioandvideostreamsfunction,fortherealizationofIPTVvideoondemandterminalhardwareandsoftwareprovidesagoodfoundation.PaperdiscussedindepthbasedontheAndroidhomenetworkbroadcastterminalcoretechnologiestechnologytheoryandimplementation.First,fromthegeneralintroductionofIPTVdevelopment;whiletheInstituteinvolvedinthisissueabrieftechnicaldescriptionofthetheory,includingIPTVset-topboxtechnology,streamingmediatechnology,RTP/RTCP/RTSP/SDPprotocolsandMPEG-2transportstream;focusesontheendIPTVvideoondemandsystemdesign:streamingmediaclientandserverinteractionprocess,playingaudioandvideodecodingandmessage-drivenmechanism;toachieveavideoIIqualitytoprovidegoodandfriendlyhuman-computerinteractionofthebasicvideoon-demandterminal.Keywords:IPTVSTBVODStreamingI目录摘摘摘摘要要要要............................................................................................................................................................................................................................................................IIIIAbstractAbstractAbstractAbstract........................................................................................................................................................................................................................................................IIII1111引言引言引言引言................................................................................................................................................................................................................................................................11111.1课题背景及研究意义.................................................................................................................11.2研究目标与研究内容.................................................................................................................21.2.1研究目标.........................................................................................................................21.2.2研究内容.........................................................................................................................21.3国内外发展现状.........................................................................................................................31.3.1国外研究现状.................................................................................................................31.3.2国内研究现状...........................................................................