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ATSC Proposed Standard: Signaling, Delivery, Synchronization, and Error Protection (A/331)

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ATSC S33-174r7 Signaling, Delivery, Synchronization, and Error Protection 4 May 2017 ATSC Proposed Standard: Signaling, Delivery, Synchronization, and Error Protection (A/331) Doc S33-174r7 4 May 2017 Advanced Television Systems Committee 1776 K Street, N.W. Washington, D.C. 20006 202-872-9160 i ATSC S33-174r7 Signaling, Delivery, Synchronization, and Error Protection 4 May 2017 The Advanced Television Systems Committee, Inc., is an international, non-profit organization developing voluntary standards for digital television. The ATSC member organizations represent the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries. Specifically, ATSC is working to coordinate television standards among different communications media focusing on digital television, interactive systems, and broadband multimedia communications. ATSC is also developing digital television implementation strategies and presenting educational seminars on the ATSC standards. ATSC was formed in 1982 by the member organizations of the Joint Committee on InterSociety Coordination (JCIC): the Electronic Industries Association (EIA), the Institute of Electrical and Electronic Engineers (IEEE), the National Association of Broadcasters (NAB), the National Cable Telecommunications Association (NCTA), and the Society of Motion Picture and Television Engineers (SMPTE). Currently, there are approximately 120 members representing the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries. ATSC Digital TV Standards include digital high definition television (HDTV), standard definition television (SDTV), data broadcasting, multichannel surround-sound audio, and satellite direct-to-home broadcasting. Note: The user's attention is called to the possibility that compliance with this standard may require use of an invention covered by patent rights. By publication of this standard, no position is taken with respect to the validity of this claim or of any patent rights in connection therewith. One or more patent holders have, however, filed a statement regarding the terms on which such patent holder(s) may be willing to grant a license under these rights to individuals or entities desiring to obtain such a license. Details may be obtained from the ATSC Secretary and the patent holder. Revision History Version Date Candidate Standard approved 5 January 2016 Updated CS approved 21 September 2016 Standard approved Insert date here ii ATSC S33-174r7 Signaling, Delivery, Synchronization, and Error Protection 4 May 2017 Table of Contents 1. SCOPE ..................................................................................................................................................... 1 1.1 Introduction and Background 1 1.2 Organization 1 2. REFERENCES ......................................................................................................................................... 1 2.1 Normative References 2 2.2 Informative References 4 3. DEFINITION OF TERMS .......................................................................................................................... 5 3.1 Compliance Notation 5 3.2 Treatment of Syntactic Elements 6 Reserved Elements 6 3.3 Acronyms and Abbreviation 6 3.4 Terms 8 3.5 Extensibility 11 3.6 XML Schema and Namespace 11 4. SYSTEM OVERVIEW ............................................................................................................................. 12 4.1 System Conceptual Model 12 4.2 Features 13 5. SERVICE SIGNALING OVERVIEW ....................................................................................................... 13 5.1 Receiver Protocol Stack 13 5.2 Entity Relationships and Addressing Architecture 14 5.3 Service Types 15 6. LOW LEVEL SIGNALING ...................................................................................................................... 18 6.1 IP Address Assignment 19 6.2 LLS Table Format 20 6.3 Service List Table (SLT) 21 SLT Syntax Description 22 SLT Semantics 23 6.4 System Time Fragment 27 6.5 Advanced Emergency Alert Table 29 AEAT and AEA Syntax Description 30 AEAT and AEA Semantics 31 6.6 OnscreenMessageNotification Fragment 36 OnscreenMessageNotification Syntax 36 OnscreenMessageNotification Semantics 37 6.7 Signaling Server 38 7. SERVICE LAYER SIGNALING .............................................................................................................. 40 7.1 ROUTE/DASH Service Layer Signaling 43 Streaming Content Signaling 44 App-based Feature Signaling 44 User Service Description 44 7.1.3.1 User Service Description for ROUTE – Semantics 45 Service-based Transport Session Instance Description (S-TSID) 47 DASH Media Presentation Description (MPD) 49 iii ATSC S33-174r7 Signaling, Delivery, Synchronization, and Error Protection 4 May 2017 7.1.5.1 Signaling for Staggercast Audio Representation 50 7.1.5.2 Content ID for Content in ROUTE/DASH Services 50 Service Signaling Delivery 50 7.1.6.1 Signaling Description Encapsulation 50 7.1.6.2 Signaling Description Filtering 50 Associated Procedure Description (APD) 51 7.1.7.1 APD Semantics 52 7.1.7.2 End of File Transmission and Start of File Repair Procedure 52 Distribution Window Description (DWD) 52 7.2 MMTP-Specific Service Layer Signaling 53 User Service Description for MMTP 53 7.2.1.1 User Service Description for MMTP – Semantics 57 DASH Media Presentation Description (MPD) 60 MMTP-Specific Signaling Message 60 7.2.3.1 mmt_atsc3_message() MMTP-Specific Signaling Message 61 7.2.3.2 Video Stream Properties Descriptor 64 7.2.3.2.1 Syntax 64 7.2.3.2.1.1 Scalability Information 67 7.2.3.2.1.2 MultiView Information 67 7.2.3.2.1.3 Resolution, Chroma Format, Bit-depth and Video Properties Information: 68 7.2.3.2.1.4 Picture Rate Information 69 7.2.3.2.1.5 Bit Rate Information 69 7.2.3.2.1.6 Color Information 70 7.2.3.2.1.7 Transfer Function Information 71 7.2.3.3 ATSC Staggercast Descriptor 71 7.2.3.4 Audio Stream Properties Descriptor 72 7.2.3.4.1 Syntax and Semantics 72 7.2.3.4.2 Emergency Information Time Information 79 7.2.3.4.3 Multi-Stream Information 80 7.2.3.4.4 Presentation Aux-Stream Information 81 7.2.3.5 Caption Asset Descriptor 81 7.2.3.5.1 Syntax and Semantics 81 7.3 Content Advisory Ratings in Service Signaling 83 DASH Signaling of RRT-based Content Advisories 83 MMTP-Specific Signaling of RRT-Based Content Advisories 85 MMTP-Specific Signaling of Non-RRT Content Advisories 85 8. DELIVERY AND AL-FEC ....................................................................................................................... 85 8.1 Broadcast Delivery 85 ROUTE/DASH 85 8.1.1.1 Streaming Services Delivery 86 8.1.1.2 Locally-Cached Content Delivery 87 8.1.1.3 Synchronization and Time 87 8.1.1.4 ROUTE/DASH System Model 88 8.1.1.5 ROUTE System Buffer Model 90 8.1.1.5.1 Data Delivery Event (DDE) 90 8.1.1.5.2 Media Delivery Event (MDE) 90 8.1.1.5.3 ROUTE Transport Buffer Model 91 8.1.1.6 Application of AL-FEC (Informative) 92 iv ATSC S33-174r7 Signaling, Delivery, Synchronization, and Error Protection 4 May 2017 MMTP/MPU 93 8.1.2.1 Broadcast Streaming Delivery of MPUs 93 8.1.2.1.1 Mapping Between an ATSC 3.0 Service and MMT Packages 93 8.1.2.1.2 Constraints on MPU 94 8.1.2.1.3 Constraints on MMTP 94 8.1.2.2 Packetization of MPU 96 8.1.2.3 Synchronization 97 8.1.2.4 Delivery of Locally-Cached Service Content 97 8.1.2.5 AL-FEC 98 8.2 Hybrid (Broadcast/Broadband) Delivery 98 ROUTE/DASH Modes of Hybrid Service Access 98 8.2.1.1 Synchronization 98 8.2.1.2 Broadband DASH-only Service Access 99 8.2.1.2.1 Exclusive Delivery of Service Components via Broadband 99 8.2.1.2.2 Hand-off from Broadcast to Broadband Service Access 99 MMTP/MPU Modes of Hybrid Service Access 99 8.2.2.1 Introduction 99 8.2.2.2 Constraints on DASH 100 8.2.2.3 Synchronization 100 8.2.2.4 Acquisition 101 8.2.2.5 Broadband-Only Service (Signaled by Broadcast) 101 8.3 File Repair Procedure 101 File Repair for Receivers that are not AL-FEC Capable 101 File Repair for Receivers that are AL-FEC capable 102 Repair Server Location and Response Deadline 102 ANNEX A : ROUTE ..................................................................................................................................... 104 A.1 OVERVIEW of ROUTE 104 A.1.1 General 104 A.1.2 Source Protocol 104 A.1.3 Repair Protocol 104 A.1.4 Features 105 A.1.5 System Architecture 105 A.2 Data Model and Session Initiation 107 A.2.1 Data Model 107 A.2.2 ROUTE Session 108 A.2.3 Transport Sessions 108 A.3 Source Protocol Specification 108 A.3.1 Overview 108 A.3.2 Description 108 A.3.2.1 Source Flow Syntax Description 108 A.3.2.2 Source Flow Semantics 110 A.3.3 Delivery Objects 113 A.3.3.1 Overview 113 A.3.3.2 File Mode 113 A.3.3.3 Entity Mode 119 A.3.3.4 Packaging 119 A.3.4 Usage of ALC and LCT 120 A.3.5 Packet Format 121 v ATSC S33-174r7 Signaling, Delivery, Synchronization, and Error Protection 4 May 2017 A.3.6 LCT Building Block 121 A.3.7 Extension Headers 124 A.3.7.1 Introduction 124 A.3.7.2 EXT_ROUTE_PRESENTATION_TIME Header 124 A.3.7.3 EXT_TIME Header 124 A.3.8 Basic ROUTE Sender Operation 125 A.3.9 Basic ROUTE Receiver Operation 125 A.3.9.1 Overview 125 A.3.9.2 Basic Delivery Object Recovery 126 A.3.9.3 General Metadata Recovery 127 A.3.9.4 Packaged Mode Reception 127 A.4 Repair Protocol Specification 128 A.4.1 Introduction 128 A.4.2 FEC Protocol 128 A.4.2.1 Introduction 128 A.4.2.2 FEC transport object construction 129 A.4.2.3 Super-Object and FEC repair for delivery objects 130 A.4.2.4 Repair Packet Structure 131 A.4.2.5 Summary FEC Information 131 A.4.2.6 Extension Headers 132 A.4.3 Repair Flow Declaration 132 A.4.3.1 General 132 A.4.3.2 Semantics 132 A.4.3.3 TOI Mapping 134 A.4.3.4 Examples for RepairFlow Declarations 135 A.4.4 Receiver Operation 137 A.4.4.1 Introduction 137 A.4.5 Example Operation 138 A.4.6 Repair Protocol 139 A.5 Security Considerations 139 ANNEX B : SIGNALING INSTANCE EXAMPLES .....................................................................................
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