ETSI TS 103 286-2 V1.2.1 (2017-08)

Digital Video Broadcasting (DVB); Companion Screens and Streams; Part 2: Content Identification and Media Synchronization

RTS/JTC-DVB-374-2

General Information

• Status: Published
• Publication Date: 02-Aug-2017
• Technical Committee: BROADCAS - EBU/CENELEC/ETSI on Broadcasting
• Current Stage: 12 - Completion
• Due Date: 07-Aug-2017
• Completion Date: 03-Aug-2017

Standards Content (Sample)

ETSI TS 103 286-2 V1.2.1 (2017-08)






TECHNICAL SPECIFICATION
Digital Video Broadcasting (DVB);
Companion Screens and Streams;
Part 2: Content Identification and Media Synchronization

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2 ETSI TS 103 286-2 V1.2.1 (2017-08)



Reference
RTS/JTC-DVB-374-2
Keywords
broadcast, companion screen, DVB,
synchronization, TV
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3 ETSI TS 103 286-2 V1.2.1 (2017-08)
Contents
Intellectual Property Rights . 9
Foreword . 9
Modal verbs terminology . 10
Introduction . 10
1 Scope . 14
2 References . 14
2.1 Normative references . 14
2.2 Informative references . 16
3 Definitions and abbreviations . 17
3.1 Definitions . 17
3.2 Abbreviations . 19
4 Overview . 21
4.1 Interfaces . 21
4.2 Architecture for identification and companion synchronization . 21
4.2.1 General . 21
4.2.2 Media synchronization architecture . 24
4.2.3 Mapping of generic media synchronization architecture to Timeline Synchronization . 26
4.2.4 Simplified scenario for the TV Device . 28
4.3 Procedures . 28
4.3.1 Introduction. 28
4.3.2 Content Identification and other Information (CSS-CII) . 29
4.3.3 Material Resolution Service (CSS-MRS) . 30
4.3.4 Wall Clock (CSS-WC) . 31
4.3.5 Timeline Synchronization (CSS-TS) . 32
4.3.6 Trigger Events interface (CSS-TE) . 34
5 Data model . 36
5.1 Data model introduction . 36
5.2 Content Identification . 37
5.2.1 General . 37
5.2.2 Content Identifier stem . 38
5.2.3 DVB Broadcast and IPTV services . 38
5.2.3.1 General . 38
5.2.3.2 Net path for DVB broadcast services . 39
5.2.3.3 Net path for DVB IPTV services . 40
5.2.3.4 Event Constraint . 40
5.2.3.5 Query . 40
5.2.3.6 Progressive build-up of CIs for DVB Broadcast and IPTV services . 41
5.2.3.6.1 Common . 41
5.2.3.6.2 DVB Broadcast systems . 42
5.2.3.6.3 DVB IPTV systems . 42
5.2.4 DVB DASH services . 43
5.2.5 Other types of service . 43
5.3 Timelines . 44
5.3.1 General . 44
5.3.2 Tick rate and accuracy properties . 44
5.3.3 Sources of Timelines and the Timeline Selector. 46
5.3.4 MPEG-TS PTS: Presentation Time Stamp . 47
5.3.5 ISOBMFF: composition time . 47
5.3.6 TS Adaptation Packet . 47
5.3.7 MPEG DASH: Period relative Timeline . 47
5.3.7.1 General . 47
5.3.7.2 Timeline Selector for a Period relative Timeline . 48
5.3.7.3 Determining Time Values and Timestamps for a Period relative Timeline . 48
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4 ETSI TS 103 286-2 V1.2.1 (2017-08)
5.4 Timeline correlation . 49
5.5 Material Information . 51
5.5.1 General . 51
5.5.2 Material . 52
5.5.3 Material Identifiers . 53
5.5.4 Synchronization Timeline information . 53
5.5.5 Timeline mappings . 54
5.5.6 Correlation Timestamps . 54
5.5.7 Trigger Event info . 55
5.5.8 Process for determining which Materials are Active Materials . 55
5.5.9 JSON syntax for representing Material Information . 57
5.5.9.1 General . 57
5.5.9.2 JSON for Material . 58
5.5.9.3 JSON for Material Identifier . 58
5.5.9.4 JSON for Synchronization Timeline information . 58
5.5.9.5 JSON for Timeline properties . 59
5.5.9.6 JSON for Timeline Mapping . 59
5.5.9.7 JSON for Correlation Timestamp . 60
5.5.9.8 Trigger Event Info . 60
5.6 Content Identification and other Information (CII) . 61
5.6.1 General . 61
5.6.2 Reporting the MRS URL . 61
5.6.3 Reporting the Content Identifier . 62
5.6.4 Status of presentation . 62
5.6.5 Reporting Wall Clock, Timeline Synchronization and Trigger Event Notification service endpoint
URLs . 63
5.6.6 Reporting a list of timeline options . 64
5.6.7 JSON Representation of Content Identification and other Information . 64
5.7 Timestamps and Timeline Synchronization . 65
5.7.1 General . 65
5.7.2 Reference point for timestamping . 66
5.7.3 Setup data. 66
5.7.4 Actual, Earliest and Latest Presentation Timestamp . 67
5.7.5 Control Timestamps . 68
5.8 Trigger Events . 69
5.8.1 General . 69
5.8.2 Encoding Trigger Event locations . 69
5.8.3 Reference point for Trigger Events . 69
5.8.4 Trigger Event Sources . 69
5.8.4.1 General . 69
5.8.4.2 DSM-CC "do it now" Stream Events . 70
5.8.4.2.1 Encoding in MPEG TS . 70
5.8.4.2.2 Encoding the URI referencing the Trigger Event . 70
5.8.4.2.3 Trigger Event data . 70
5.8.4.2.4 Reference point . 70
5.8.4.3 DASH Events . 71
5.8.4.3.1 Encoding in the DASH Content . 71
5.8.4.3.2 Encoding the URI referencing the event . 71
5.8.4.3.3 Event Data . 71
5.8.4.3.4 Reference Point . 71
5.8.4.4 Other Event Sources . 72
5.8.5 Messages . 72
5.8.5.1 General . 72
5.8.5.2 Trigger Event Session Setup (TESS) message . 72
5.8.5.3 Trigger Event Subscription Management (TESM) messages . 73
5.8.5.4 Trigger Event Notification (TEN) message . 73
5.9 Private data . 75
5.9.1 General . 75
5.9.2 JSON for an item of private data . 75
6 Content Identification and other Information (CSS-CII) . 76
6.1 General . 76
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5 ETSI TS 103 286-2 V1.2.1 (2017-08)
6.2 Protocol . 76
6.3 Protocol transport . 77
7 Material Resolution Service (CSS-MRS) . 78
7.1 General . 78
7.2 Material resolution protocol . 78
7.3 Material resolution protocol query . 78
7.3.1 Material resolution protocol general requirements . 78
7.3.2 Material resolution protocol URL . 79
7.3.3 Material resolution protocol parameter . 79
7.4 Material resolution protocol response . 80
7.5 Material resolution protocol example (informative) . 81
7.6 MRS Update Protocols . 82
7.6.1 General . 82
7.6.2 JSON syntax for update array element . 82
7.6.3 Update response JSON . 83
7.6.3.1 Update response JSON types . 83
7.6.3.2 Semantics of Material update responses . 83
7.6.3.3 Semantics of Timeline Sync update responses . 83
7.6.4 Long poll . 84
7.6.5 WebSocket protocol . 84
7.6.6 Server Sent Events protocol . 84
7.6.7 BOSH/XMPP protocol . 85
8 Wall Clock (CSS-WC) . 85
8.1 General . 85
8.2 Protocol overview. 85
8.2.0 Protocol Introduction . 85
8.2.1 Time values and estimating Wall Clock offset . 86
8.2.2 Measurement precision . 87
8.2.3 Maximum frequency error . 87
8.3 Wall Clock protocol . 88
8.4 Wall clock protocol transport . 89
9 Timeline Synchronization (CSS-TS) . 90
9.1 General . 90
9.2 Protocol . 90
9.3 Protocol transport . 92
10 Trigger Events (CSS-TE) . 93
10.1 General . 93
10.2 Protocol . 93
10.3 Protocol Transport . 94
11 Timelines in Transport Stream adaptation fields . 95
11.1 General . 95
11.2 Void . 95
11.3 Timed External Media Information (TEMI) . 95
11.3.1 General . 95
11.3.2 Timeline Selector for an MPEG TEMI timeline . 95
11.3.3 Interpretation of a temi_timeline_descriptor . 95
11.3.4 Determining Disappearance of a TEMI timeline (informative) . 96
11.3.5 TEMI timelines and bitstream manipulation (informative) . 96
12 Connection and playback session management . 96
Annex A (informative): JSON representation . 98
A.1 JSON Schemas . 98
A.1.1 General . 98
A.1.2 Core schema . 98
A.1.3 Material Information (MI) schema . 100
A.1.4 Content Identification and other Information (CII) schema . 102
A.1.5 Setup-data schema . 103
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6 ETSI TS 103 286-2 V1.2.1 (2017-08)
A.1.6 Control Timestamp schema . 103
A.1.7 Actual, Earliest and Latest Presentation Timestamp schema . 104
A.1.8 Trigger Event Session
...