MPEG用于电视的过去,当前和未来.ppt

MPEG用于电视的过去、当前和未来,MPEGforthepastoftelevisionMPEG用于电视的过去,System系统TransportStream传送流DSM-CC数字存储媒体命令与控制Timedmetadata有定时的宏数据Video视频MPEG-2HighProfileMPEG-2高档次Audio音频MPEG-1AudioLayerII音频第2层MPEG-2AACMPEG-2高级音频编码,2012/05/02,2,MPEGforthepast,presentandfutureofTV,Anassessment评价,MPEGhasprovidedthemeansforthetelevisionbusinessonair,cableandsatellitetomigratefromtheanaloguetothedigitalageMPEG对地面、有线和卫星的电视服务从模拟过渡到数字时代，提供各种方法Ithasbeenacollectiveefforts它是集体努力的结果Representativesfromtheentirespectrumofthebroadcastingworldprovidedtheirrequirements来自广播界的方方面面代表已提出各种需求Packagesofpatentlicenceswerecreated(outsideofMPEG)在MPEG之外，已创建成套的专利许可证Todaythereisvirtuallynobroadcastingsystemthatisnotbased,atleastpartially,onMPEGstandards目前没有一个广播系统不是基于MPEG标准（至少部分基于）,MPEGforthepast,presentandfutureofTV,3,2012/05/08,MPEGforthepresentoftelevisionMPEG用于电视的当前,Systems系统CarriageofMPEG-4onMPEG-2TS用于在MPEG-2TS上承载MPEG-4DynamicAdaptiveStreamingoverHTTP(DASH)HTTP(DASH)上的动态自适应流媒体Video视频MPEG-4AdvancedVideoCoding(AVC)MPEG-4高级视频编码3Dextensions各种3D扩展Audio音频VariousformsofAdvancedAudioCoding(AAC)高级音频编码的各种形式UniversalSpeechandAudio(USAC)通用的语音和音频编码,2012/05/08,4,MPEGforthepast,presentandfutureofTV,Anassessment评价,Thedeploymentof2ndgenerationdigitalbroadcastingsystemscontinuessuccessfully第二代数字广播系统的部署继续顺利进行UseoftheAVConMPEG-2TSallowspackingtwiceasmanyprogramsasMPEG-2Videoinananaloguechannel在单个模拟电视频道中，采用MPEG-2TS承载AVC视频，替代MPEG-2视频，可使节目数量翻一番WithIPTVthenotionofbroadcastingisexpandingIPTV正在拓展广播的概念MPEGishelpingthebroadcastingindustryMPEG正在帮助广播工业界Toenrichthebroadcasteduserexperience丰富了广播用户的体验Throughstandardtechnologiesthatservemultiplefields通过标准技术服务于多个领域,MPEGforthepast,presentandfutureofTV,5,2012/05/08,MPEGforthefutureoftelevisionMPEG用于电视之未来,Well,thatswhatIamsupposedtotalkabout好，下面是我今天准备讨论的,2012/05/08,6,MPEGforthepast,presentandfutureofTV,Broadcastingisagreatbusinesstobein广播业在未来仍然将是一个巨大的事业,Broadcastingisaprovenbusinesswithaconstantrevenueflow广播业已被证实具有稳定的收益流Manytechnologiesappearthat很多技术表现出能够：Canhelpnewcompetingbusinessesbut有助于具有竞争力的新服务Canalsobeusedtoextendthebroadcastingbusiness而且还可用于扩展广播服务MPEGisaneutralbodydevotedtothedevelopmentofstandardtechnologiesforusercommunitiestoexploitMPEG是一个中立团体，致力于开发各类用户群体所需的标准化技术,MPEGforthepast,presentandfutureofTV,7,2012/05/08,MPEG-H:avideostandardforfuturebroadcastingMPEG-H:用于未来广播的视频标准,ISO/IEC23008HighEfficiencyCodingandMediaDeliveryinHeterogeneousEnvironmentsISO/IEC23008：高效编码和异构环境的媒体发送Asuiteofstandardsformediacodinganddelivery用于媒体编码和发送的一整套标准Currentlyscheduledtoappearin3parts目前计划包括三部分：MPEGMediaTransportMPEG媒体传送HighEfficiencyVideoCoding高效视频编码3DAudio3D音频Timeline时间表CD委员会草案DIS国际标准草案FDIS国际标准定稿草案,MPEGforthepast,presentandfutureofTV,8,2012/05/08,ServicecompositioninMMTMMT（多媒体传送流）中的服务组装,Birdisflying,Birdisflying鸟在飞,Compositioninformation组装信息friendlywithhtml5与HTML5友好,legacybroadcasting传统广播,futurebroadcasting未来广播,9,MMTPackageMMT信息包,MPEGforthepast,presentandfutureofTV,2012/05/02,通用发送的各种内容,3D地球,Clouds,MMTEncapsulatorMMT封装器,ServiceComponentList服务组件的清单Componentlocation组件的位置Compositionrelationship组装的关系QoErequirement封装质量的需求Howtodeliver如何发送Howtoconsume如何消费,Web互联网,Video视频,File文件,Configuration配置Adaptivedelivery自适应发送Sync,Delay,Losscontrol同步，延迟，丢包控制,MMTFrameMTT数据帧,pull拉动,pull,SmartdeliveryinClouds云计算中的智能发送,10,2012/05/08,Mash-upservice混成服务,Service1(MMTPackage1)服务1（MMT信息包1）,Service2(MMTPackage2)服务2（MMT信息包2）,MMTassetsMMT各种资产,Audio音频,Video1视频1,Widget小工具菜单,Webpage网页,Video2视频2,11,2012/05/08,MPEGforthepast,presentandfutureofTV,Secondscreenmanagement第二屏幕的管理,AdditionalInformationwithLiveContent(HTML)实况内容的附加信息（HTML）,Issue,Videocontenton2nddevice在第二设备上的视频内容,Compositioninformation组装信息,MMTPackageMMT信息包,12,2012/05/08,MPEGforthepast,presentandfutureofTV,MPEG-Hpart2HighEfficiencyVideoCodingMPEG-H第2部分高效视频编码,Primarygoal:50%bettercompressionthanAVC最初目标：压缩效率比AVC提高50%Forlargedisplays(e.g.4kx2k)用于大屏幕(例如4kx2k)Formobile(e.g.WVGA)用于移动服务(例如，WVGA)DevelopedjointlywithITU-TbyJointCollaborativeTeam(JCT)onVideoCoding由MPEG与ITU-T联合成立的视频协作组制定TechnicallyinthesamestreamofpastMPEGVideoCodingstandards(AVCandpriorstandards)技术上使用与MPEG以前的视频编码标准(AVC及以前标准)相同的传送流CurrentlyatCommitteeDraftlevel目前处于委员会草案的阶段,MPEGforthepast,presentandfutureofTV,13,2012/05/08,HEVCvsAVCSubjectivePerformanceMeasurementsHEVC和AVC主观性能测试的对比,PreliminarysubjectivetestscarriedoutforHEVCCommitteeDraft对HEVC委员会草案已进行初步的主观测试Reasonablysmallandnon-overlappingconfidenceintervals合理较小的和不重叠的信任度间隔Averageratesavingsatsame(interpolated)MOSpoints在相同的(内插的)MOS(评分平均)点，得出可节省的平均比特率HEVCwith67%lowerrateinclassB(FullHD)在B类(全高清)中HEVC的比特率要低67%HEVCwith49%lowerrateinclassC(WVGA)在C类(WVGA)中HEVC的比特率要低49%HEVCwith58%lowerrateoverallHEVC整体比特率要低58%,2012/05/08,MPEGforthepast,presentandfutureofTV,14,Aperformancesample一个性能样本,2012/05/08,MPEGforthepast,presentandfutureofTV,15,Forthosetechnologyaware涉及的有关技术,Block-based/Variableblocksizes基于块的/可变块尺寸Blockmotioncompensation块的运动补偿Fractional-pelmotionvectors分像素的运动矢量Spatialintraprediction空间域的帧内预测Spatialtransformofresidualdifference残差值的空间域变换Integer-basedtransformdesigns基于整数的各种变换设计ArithmeticorVLC-basedentropycoding基于算术的或变字长编码的熵编码In-loopfilteringtoformfinaldecodedpicture环内的滤波处理以形成最终的解码图像,2012/05/08,MPEGforthepast,presentandfutureofTV,16,Whereweare(May2012)我们身处何处(2012年5月),Activity:levelof1,000documentspermeetingcrossed活动：每次会议审议约1,000个文件Verydiverseparticipationfromindustry/academia工业界和学术界的极广泛参加Significanttechnicaladvanceoverpriorstandards与过去的各种标准相比，已有显著的技术进步Challenge:computational/implementationcomplexity挑战：计算/实现的复杂度Deliverables:可发布的：Spec技术规范Referencesoftware参考软件Conformance符合性Currentlyonlyoneprofile目前只有一个档次,2012/05/08,MPEGforthepast,presentandfutureofTV,17,HEVCScalabilityExtensions/1HEVC可伸缩性扩展/1,ServetheneedsofheterogeneousenvironmentoffuturedigitalTVdistribution服务于未来数字电视分发的异构环境之各种需求Multipledevices:SHDTVs,set-topboxes,tablets,smartphones,PCsetc.多类设备：超高清电视机，机顶盒，平板电脑，智能手机，个人电脑等Widerangeofprocessingpowers,displaysizesandpowerconsumptionneeds较宽范围的处理能力、显示器尺寸和功耗需求Multiplenetworks:Cable,Satellite,Terrestrial,CDN,CableModem,xDSL,WiFi,4G多类网络：有线、卫星、地面、有线数字网络、有线调制解调器，xDSL，WiFi，4GWiderangeofchannelbandwidthsandQoS较宽范围的各种信道带宽和服务质量Multipleprotocols(多类协议):MPEG-2TS,DASH,HLS,RTP,UDPMultipleservices:Broadcasting,Ondemand,Streaming,OverTheTop多类服务：广播，点播，媒体流、三网融合,2012/05/08,MPEGforthepast,presentandfutureofTV,18,HEVCScalabilityExtensions/2HEVC可伸缩性的扩展/2,Optionsforbackwardcompatiblemigrationpaths用于向后兼容的迁移途径之各种可选项From720p60to1080p60从720p60到1080p60From1080p60to4kx2kp60从1080p60到4kx2kp60FromAVCtoHEVC从AVC到HEVCTimeLine时间表May2012PreliminaryCallforProposals(public)2012年5月，初次征求提案（公开）July2012FinalCallforProposals(public)2012年7月，最终征求提案（公开）October20122012年10月EvaluationofproposalsMPEGSurroundforbinauralisationUSAC用于立体声；MPEG环绕声用于双耳效应化Whatisthe“Wow”factor?“叫好”因素是什么？Tospuradoptionofnewtechnology鞭策采纳新技术,41,MPEGforthepast,presentandfutureofTV,2012/05/08,UserExperience用户体验,42,HomeTheatre家庭影院,TabletTV平板电视,Spatializedonheadphones耳机上的空间感,2012/05/08,MPEGforthepast,presentandfutureofTV,FlexibleRendering灵活的演奏,Contentproviderscreate22.2program内容提供者创建22.2节目Consumedonstereo,5.1,10.1,22.2layouts在立体声,5.1,10.1,22.2等配置上消费Consumedon“wrong”layouts在“错误的”配置上消费Mis-positionedsurrounds错误放置环绕声Missingsurrounds丢失环绕声Non-standardlayouts非标准的配置2fronthigh,5.1mid2个前置的“音柱”，而5.1在中间,43,MPEGforthepast,presentandfutureofTV,2012/05/08,3DAudioTestPlatform三维音频测试平台,NHK“LoudspeakerArrayFrame”(LAF)日本广播协会的“扬声器阵列机架”(LAF)Suggestionsfor建议用于Alternativeplatformforassessing“HomeTheatre”usecase评估“家庭影院”示例的另一种平台Modelforassessing“PersonalTV”usecase评估“个人电视”示例的模型,44,MPEGforthepast,presentandfutureofTV,2012/05/02,Summary小结,Providecompellingimmersiveaudioexperienceforaudio/visualprograms为各种音频/视频节目提供强烈浸润性的音频体验Createcontentonce,presentonmanydifferentloudspeakerlayoutsoronheadphones音频内容仅进行一次制作，就可以在多种不同的扬声器配置上或耳机上呈现Providehighcompressionandhigh-qualityaudiopresentation提供高压缩和高质量的音频呈现,45,MPEGforthepast,presentandfutureofTV,2012/05/08,MPEG-V:HumanshavemorethantwosensesMPEG-V：人类的感知超过两种,2012/05/08,MPEGforthepast,presentandfutureofTV,46,信源,媒体处理机器,媒体+感知,控制媒体演奏设备,听觉视觉嗅觉冷热感知机械感知,用户,MARBle,MediaServers,ServiceServers,User,LocalSensors&Actuators,RemoteSensors&Actuators,ARAFfileorstream,LocalRealWorldEnvironment,RemoteRealWorldEnvironment,AugmentedRealityApplicationFormat(ARAF)增强现实的应用格式(ARAF),MPEGforth