book

Interactive TV Standards

by Steven Morris, Anthony Smith-Chaigneau

August 2012

Intermediate to advanced

608 pages

19h 5m

English

Routledge

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Cover
Halftitle
Title
Copyright
Contents
Introduction
1 The Middleware Market
Why Do We Need Open Standards?Driving Forces Behind Open Standard MiddlewareStandards in DTVCorrecting the Fragmented ITV MarketWhat Are DVB and CableLabs?The Digital Video Broadcasting ProjectDVB-MHP: The Multimedia Home PlatformCableLabsOpenCable Applications Platform (OCAP)A History Lesson: The Background of MHP and OCAPThe MHP Family TreeJavaTV: A Common Standard for DTVHarmonization: Globally Executable MHPThe Difficult Part of StandardizationIntellectual Property and RoyaltiesWhere Do We Go from Here?Open Versus Proprietary Middleware
2 An Introduction to Digital TV
The Consumer PerspectiveCustomizable TVUnderstanding DTV ServicesProducing DTV ContentElementary StreamsTransport StreamsThe Multiplexing ProcessCarrying Transport Streams in the NetworkEnergy DispersalError CorrectionModulationCable, Satellite, and Terrestrial BroadcastingBroadcasting Issues and Business OpportunitiesSubscriber Management and ScramblingAccess IssuesThe Subscriber Management SystemThe Return Channel: Technical and Commercial Considerations
3 Middleware Architecture
MHP and OCAP Are Not JavaThey Are Not the Web, EitherWorking in the Broadcast WorldThe Anatomy of an MHP/OCAP ReceiverThe NavigatorDifferences in OCAPA New Navigator: The Monitor ApplicationModules in the Execution EngineArchitectural Issues for ImplementersChoosing a Java VMSun’s JVM or a Clean-room Implementation?The Impact of the Java Community ProcessPortabilityPerformance Issues
4 Applications and Application Management
An Introduction to XletsXlet BasicsXlet ContextsWriting Your First XletDos and Don’ts for Application DevelopersApplication SignalingExtending the AITControlling XletsRegistering Unbound ApplicationsMaking Applications Coexist ReliablyPitfalls for Middleware Developers

5 The JavaTV Service Model
What Happens During Service Selection?Abstract ServicesManaging Abstract Services in OCAPRegistering ApplicationsSelecting Abstract Services
6 Resource Management Issues
Introducing the Resource Notification APIUsing the Resource Notification APIHandling Resource ContentionResource Management in OCAPResource Contention Before Version I12Resource Contention in Later VersionsCommon Features of Resource Contention HandlingAn Example of a Possible Resource Contention SolutionResource Management Strategies in OCAPMerging OCAP and MHP Resource Management
7 Graphics APIs
The Display Model in a DTV ReceiverHScreens and HScreenDevicesConfiguring Screen DevicesScreen Devices and Resource ManagementA Practical Example of Device ConfigurationHScenes and HsceneTemplatesCreating an HSceneDeveloping Applications Using HScenesThe HAVi Widget SetChanging the Look of Your ApplicationHLooks in PracticeThe Behavior of Components in MHP and OCAPInteracting with ComponentsCoordinate SchemesIntegrating Graphics and VideoTransparencyMattes and Alpha CompositingImagesText PresentationMultilingual SupportUsing FontsHandling User InputKeyboard Events and Input FocusExclusive Access to Keyboard EventsPractical Issues for DTV Graphics
8 Basic MPEG Concepts in MHP and OCAP
Content Referencing in the MHP and OCAP APIsLocators for DVB Streaming ContentLocators for Streaming Content in OCAP SystemsLocators for FilesLocators for Video DripsLocator ClassesCreating a LocatorNetwork-bound Locators
9 Reading Service Information
SI and Other System ComponentsWhy Do We Need Two SI APIs?Caching StrategiesIn-band Versus Out-of-band SIThe DVB SI APIThe SI DatabaseMaking an SI RequestGetting the Results of a QueryEventsAn Example of Retrieving SI DataMonitoring SILow-level Access to SI DataUsing the JavaTV SI APIBasic ConceptsHandling the Results from an SI QueryThe Core SI APIAccess to Transport InformationAccess to Information About ServicesAccess to Information About EventsMonitoring SIThe OCAP SI ExtensionsSystem IntegrationCaching SIBuilding the API ImplementationsHandling Event HandlersPerformance Issues
10 Section Filtering
Hardware Versus Software Section FiltersUsing Section FiltersThe Section-filtering APISection FiltersTypes of Section FiltersSection Filter GroupsSection Filter EventsAn ExampleThe Middleware Perspective: Event DispatchingManaging Section Filter ResourcesManaging Section Filters in Your ApplicationManaging Section Filters in the Middleware
11 Media Control
Content Referencing in JMFBasic JMF ConceptsThe Player Creation ProcessA Closer Look at Data SourcesJMF PlayersThe Player State MachinePlayer EventsTime Bases, Clocks, and Media TimeDSM-CC Normal Play TimeControlsJMF Extensions for DTVjavax.tv.media.MediaSelectControljavax.tv.media.AWTVideoSizeControlorg.dvb.media.VideoFormatControlorg.davic.media.LanguageControlorg.ocap.media.ClosedCaptioningControlUsing Players to Control PlayersA DTV Special Case: The Video Drip Content FormatJMF in the Broadcast WorldGetting a Player for the Current ServicePlayers and Service SelectionIntegrating Video with AWTSubtitles, Closed Captions, and JMF PlayersManaging Resources in JMFRestrictions on Another Resource: TuningPlaying Audio from Sources Other Than Files
12 DSM-CC and Broadcast File Systems
DSM-CC BackgroundWhy Choose DSM-CC?Isn’t There Better Documentation?An Overview of DSM-CCObject CarouselsAn Example Object CarouselMore Than Just a File SystemNormal Play TimeStream EventsThe Relationship Between NPT and Stream EventsDSM-CC in DetailData CarouselsObject CarouselsMultiprotocol EncapsulationDSM-CC and SIDSM-CC Streams and the PMTDSM-CC DescriptorsDSM-CC MessagesData Carousel MessagesObject Carousel MessagesReferring to Streams and ObjectsTransporting Object Carousels in Data CarouselsParsing DSM-CC MessagesUsing the DSM-CC APIManipulating DSM-CC ObjectsMounting an Object CarouselAn ExampleUpdating ObjectsSynchronization: Stream Events and NPTPractical IssuesLatency and Caching StrategiesLatency Issues and Application DesignApplication Management and File System IssuesSystem Integration Issues
13 Security in MHP and OCAP
How Much Security Is Too Much?The MHP and OCAP Security ModelPermissionsPermission Request FilesSigned and Unsigned ApplicationsSigning ApplicationsHash FilesSignature FilesCertificatesAn Example of the Signing ProcessRevoking Certificates: The Certificate Revocation ListDistributing Certificate Revocation ListsDifferences Between MHP and OCAP
14 Communicating with Other Xlets
Class Loader Physics in MHPThe Inter-Xlet Communication ModelUsing RMIProblems with RMIRMI ExtensionsAn Example of Inter-Xlet CommunicationPractical IssuesGenerating Stub ClassesCalling Remote MethodsArguments and Return ValuesManaging Stub Classes
15 Building Applications with HTML
Application BoundariesThe Core Standards of DVB-HTMLCSS SupportScripting SupportDynamic HTMLDeveloping Applications in DVB-HTMLNavigating Around a DVB-HTML ApplicationSpecial URLsDisplaying an HTML ApplicationTransparent ElementsEmbedding Video in Your ApplicationDVB-HTML Application SignalingEvents and HTML ApplicationsLife Cycle EventsStream Events and DOM EventsSystem EventsCoexistence of HTML and Java ApplicationsAccessing Java APIs from ECMAScriptExtending the Document Object ModelReal-world HTML SupportThe Future of DVB-HTML
16 MHP 1.1
The Internet Access ProfileThe Philosophy of the Internet Client APIUsing the Internet Client APIGeneral Operations on Internet ClientsE-mail ClientsWeb BrowsersNews ReadersA Practical ExampleInner ApplicationsCreating an Inner ApplicationDrawing an Inner ApplicationThe Life Cycle of Inner ApplicationsStored ApplicationsPlug-insPlug-ins and Application SignalingBuilding a Plug-inThe Smart Card APIThe OCF ArchitectureQuerying the Smart Card ReaderUsing Card ServicesA Practical ExampleImplementing a Card ServiceMHP 1.1 in the Real World
17 Advanced Topics
Using the Return ChannelReturn Channel InterfacesGetting Access to a Return Channel InterfaceConnection-based Return ChannelUsing a Return ChannelAdvanced Application ManagementGetting Information About an ApplicationControlling ApplicationsManaging Applications in an OCAP ReceiverTuning to a Different Transport StreamNetwork InterfacesFinding the Right Network InterfaceTuning to a New Transport StreamTuning EventsResource Management in the Tuning APIAn Example of TuningTuning and Other Components
18 Building a Common Middleware Platform
GEM and Other StandardsReplacement MechanismsWhat GEM Means for Middleware ImplementersDesign IssuesPorting to a New Hardware PlatformCustomizing Our MiddlewareDeveloping Other Middleware SolutionsTechniques for Improving ReusabilityDesigning Reusable ComponentsReusability Outside GEMAn Example: The SI ComponentLimits to Reusability
19 Deploying MHP and OCAP
From Vertical Markets to Horizontal MarketsThe Fight for Eyeballs: Cable, Satellite, and TerrestrialA Mandatory Middleware Platform?Switching Off AnalogMaking Money from ITVThe Good NewsThe Bad NewsOther Types of ServicesConditional Access and Horizontal Markets“MHP Lite” and Low-end SolutionsInteroperabilityMHP Interoperability Events and Plug-festsConformance TestingAnomalies in the Conformance Testing ProgramThe MHP Conformance Testing ProcessTesting MHP: A Case StudyTesting OCAPCompliance and QualityHead-end RequirementsRemultiplexing IssuesConditional AccessUsing Object CarouselsOTA Download and Engineering ChannelsConvergence with the Internet: Fact or Fiction?
Appendix A: DVB Service Information
The Organization of SIDescriptorsTransmitting an SI TableProgram-specific InformationConditional Access InformationDVB SIFinding Information About the NetworkBouquetsDescribing Services in DVBDescribing EventsTelling the TimePutting It All TogetherOptimizing Bandwidth Usage: The Transport Stream Description Table
Appendix B: ATSC Service Information
Describing Available ChannelsThe Virtual Channel TableDescribing Individual ChannelsEvent InformationEvent Information in a Satellite NetworkExtended Text DescriptionsExtended Text MessagesExtended Descriptions in a Satellite NetworkParental RatingsAdvanced Functions: Redirecting ChannelsTelling the Time CorrectlyPutting It All TogetherPSIP Profiles in Cable SystemsBroadcasting PSIP Data
Index

Overview

For any digital TV developer or manager, the maze of standards and specifications related to MHP and OCAP is daunting-you have to patch together pieces from several standards to gather all the necessary knowledge you need to compete worldwide. The standards themselves can be confusing, and contain many inconsistencies and missing pieces. Interactive TV Standards provides a guide for actually deploying these technologies for a broadcaster or product and application developer.

Understanding what the APIs do is essential for your job, but understanding how the APIs work and how they relate to each other at a deeper level helps you do it better, faster and easier. Learn how to spot when something that looks like a good solution to a problem really isn't. Understand how the many standards that make up MHP fit together, and implement them effectively and quickly. Two DVB insiders teach you which elements of the standards that are needed for digital TV, highlight those elements that are not needed, and explain the special requirements that MHP places on implementations of these standards.

Once you've mastered the basics, you will learn how to develop products for US, European, and Asian markets--saving time and money. By detailing how a team can develop products for both the OCAP and MHP markets, Interactive TV Standards teaches you how to to leverage your experience with one of these standards into the skills and knowledge needed to work with the critical, related standards.

Does the team developing a receiver have all the knowledge they need to succeed, or have they missed important information in an apparently unrelated standard? Does an application developer really know how to write a reliable piece of software that runs on any MHP or OCAP receiver? Does the broadcaster understand the business and technical issues well enough to deploy MHP successfully, or will their project fail? Increase your chances of success the first time with Interactive TV Standards.

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