1、 ETSI TS 126 247 V14.4.0 (2018-01) Universal Mobile Telecommunications System (UMTS); LTE; Transparent end-to-end Packet-switched Streaming Service (PSS); Progressive Download and Dynamic Adaptive Streaming over HTTP (3GP-DASH) (3GPP TS 26.247 version 14.4.0 Release 14) TECHNICAL SPECIFICATION ETSI
2、ETSI TS 126 247 V14.4.0 (2018-01)13GPP TS 26.247 version 14.4.0 Release 14Reference RTS/TSGS-0426247ve40 Keywords LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucr
3、atif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the p
4、resent document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network
5、 drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors i
6、n the present document, please send your comment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except a
7、s authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ETSI 2018. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo ar
8、e trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSM and the GSM logo are trademarks registered and owned b
9、y the GSM Association. ETSI ETSI TS 126 247 V14.4.0 (2018-01)23GPP TS 26.247 version 14.4.0 Release 14Intellectual Property Rights Essential patents IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if
10、any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available
11、 on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or
12、 may be, or may become, essential to the present document. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
13、 right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by ETSI 3rd
14、Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS,
15、3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Dr
16、afting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 126 247 V14.4.0 (2018-01)33GPP TS 26.247 version 14.4.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal ve
17、rbs terminology 2g3Foreword . 8g3Introduction 8g31 Scope 9g32 References 9g33 Definitions, abbreviations and conventions . 11g33.1 Definitions 11g33.2 Abbreviations . 11g33.3 Conventions 12g34 Overview 12g35 System Description 13g35.1 Overview 13g35.2 Service Access 13g35.3 Protocols . 14g35.3.1 Gen
18、eral 14g35.3.2 Partial File Handling . 14g36 Progressive Download over HTTP . 15g36.1 General . 15g36.2 Progressive Download 15g36.3 3GPP File Format Profiles . 15g37 3GPP Dynamic Adaptive Streaming over HTTP . 15g37.1 System Description. 15g37.2 3GP-DASH Client Model 16g37.3 3GP-DASH Profiles . 17g
19、37.3.1 General 17g37.3.2 3GPP Adaptive HTTP Streaming (Release-9 AHS) . 17g37.3.3 3GP-DASH Release-10 Profile. 17g37.3.3.1 Introduction . 17g37.3.4 3GP-DASH Release 11 multiview stereoscopic 3D video profile 17g37.3.5 3GP-DASH Release 11 frame-packed stereoscopic 3D video profile 18g37.3.6 Media Cod
20、ecs . 18g37.3.7 Content Protection 18g37.3.8 Partial File Handling . 19g37.3.9 3GP-DASH Enhanced Interoperability Point . 19g37.3.10 DASH in TeleVision (TV) over 3GPP Services . 20g38 DASH - Media Presentation . 20g38.1 Introduction 20g38.2 Media Presentation Description . 21g38.2.1 General 21g38.2.
21、2 Schema and 3GPP Extension 21g38.2.3 (void) 22g38.2.4 (void) 22g38.3 MPD Assembly 22g38.4 Hierarchical Data Model 22g38.4.1 General 22g38.4.2 Period 23g38.4.2.1 General 23g38.4.2.2 Content Offering with Multiple Periods 24g38.4.3 Adaptation Sets and Representations 25g3ETSI ETSI TS 126 247 V14.4.0
22、(2018-01)43GPP TS 26.247 version 14.4.0 Release 148.4.3.1 Overview . 25g38.4.3.2 Common Attributes and Elements 25g38.4.3.3 Adaptation Set . 26g38.4.3.4 Representation . 27g38.4.3.5 Sub-Representation . 27g38.4.3.6 Content Component 28g38.4.4 Segments and Segment Information . 28g38.5 MPD Update . 2
23、9g38.5.1 General 29g38.5.2 Media Presentation Description Delta 29g38.6 Additional Media Presentation Information . 31g38.6.1 Introduction. 31g38.6.2 Program Information. 31g38.6.3 Descriptors 31g38.7 Base URL Processing . 32g38.8 Event Streams . 32g39 DASH - Usage of 3GPP File Format . 32g39.1 Intr
24、oduction 32g39.2 Segment Types and Formats 32g39.2.1 Introduction. 32g39.2.2 Initialization Segment . 33g39.2.3 Media Segment . 33g39.2.3.1 General 33g39.2.3.2 Subsegments and Segment Index 33g39.2.3.3 Subsegment Index . 33g39.2.3.4 3GP-DASH Media Segment Format . 33g39.2.4 Self-Initializing Media S
25、egment . 33g39.2.5 Media Stream and Segment Properties . 33g39.2.5.1 Media Stream Access Points . 33g39.2.5.2 Non-overlapping Segments and Subsegments 34g39.2.5.3 Bitstream concatenation 34g39.3 Usage on Server and Client 34g39.4 Segment Properties with MPD constraints . 34g39.4.1 General 34g39.4.1.
26、1 Introduction . 34g39.4.1.2 Media Presentation Timeline 34g39.4.1.3 Segment Index . 34g39.4.2 Segment Alignment 34g39.4.3 Bitstream Switching 34g39.4.4 Sub-Representation . 35g310 QoE for Progressive Download and DASH . 35g310.1 General . 35g310.2 QoE Metric Definitions 35g310.2.1 Introduction. 35g
27、310.2.2 Void 36g310.2.3 Representation Switch Events. 36g310.2.4 Average Throughput . 36g310.2.5 Initial Playout Delay . 36g310.2.6 Buffer Level 37g310.2.7 Play List 37g310.2.8 MPD Information 39g310.2.9 Playout Delay for Media Start-up . 40g310.2.10 Device information . 40g310.3 Quality Metrics for
28、 Progressive Download 41g310.4 Quality Metrics for DASH . 41g310.5 Quality Reporting Scheme for DASH 44g310.6 Quality Reporting Protocol. 45g310.6.1 General 45g310.6.2 Report Format . 45g310.6.3 Reporting Protocols 49g3ETSI ETSI TS 126 247 V14.4.0 (2018-01)53GPP TS 26.247 version 14.4.0 Release 1411
29、 Live Services 50g311.1 Overview Dynamic and Live Media Presentations 50g311.2 Dynamic Segment Download . 51g311.2.1 Background and Assumptions 51g311.2.2 MPD Information and Timing Model . 51g311.2.2.1 MPD Information 51g311.2.2.2 Segment Information Derivation . 52g311.2.2.2.1 Introduction . 52g31
30、1.2.2.2.2 Definitions . 52g311.2.2.2.3 MPD Information 52g311.2.2.2.4 Period Information . 53g311.2.2.2.5 Representation Information . 53g311.2.2.2.6 Media Time Information of Segment 53g311.2.2.2.7 Segment List Parameters . 54g311.2.2.2.8 URL Generation with Segment Template . 55g311.2.3 Service Of
31、fering Requirements and Guidelines 55g311.2.3.1 General Service Offering Requirements . 55g311.2.3.2 Dynamic Service Offering Guidelines 56g311.2.3.2.1 Introduction . 56g311.2.3.2.2 Basic Parameter Settings . 56g311.2.3.3 Content Offering with Periods 58g311.2.3.3.1 General 58g311.2.3.4 Joining Reco
32、mmendation 59g311.2.4 Client Operation, Recommendations and Guidelines (informative) . 60g311.2.4.1 Basic Operation . 60g311.2.4.2 Joining, Initial Buffering and Playout Recommendations. 62g311.2.4.2.1 General 62g311.2.4.2.2 Joining at the live edge 62g311.2.5 Considerations on live edge) . 63g311.3
33、 Live Services with MPD Updates 63g311.3.1 Background and Assumptions 63g311.3.2 Preliminaries . 63g311.3.2.1 MPD Information 63g311.3.2.2 Segment Information Derivation . 64g311.3.3 Service Offering Requirements and Guidelines 64g311.3.3.1 General 64g311.3.3.2 Setting the Minimum Update Period Valu
34、e 65g311.3.3.3 Permitted Updates in an MPD . 65g311.3.3.4 Last Segment Message 66g311.3.4 MPD-based Live Client Operation based on MPD . 66g311.4 Provisioning of Live Content in On-Demand Mode 67g311.4.1 Scenario 67g311.4.2 Content Offering Requirements and Recommendations . 67g311.4.3 Client Behavi
35、or . 68g311.5 Availability Time Synchronization between Client and Server . 68g311.5.1 Background . 68g311.5.2 Service Provider Requirements and Guidelines 68g311.5.3 Client Requirements and Guidelines. 69g311.6 Robust Operation 69g311.6.1 General Robustness. 69g311.6.2 Synchronization Loss of Segme
36、nter . 69g311.6.3 Encoder Clock Drift 69g311.6.4 Segment Unavailability . 70g311.6.5 Swapping across Redundant Tools . 70g312 Ad Insertion Enablers . 70g312.1 Background 70g312.2 Enablers 70g312.2.1 Period elements and Remote Periods 70g312.2.2 Asset Identifiers 71g312.2.3 MPD updates 71g3ETSI ETSI
37、TS 126 247 V14.4.0 (2018-01)63GPP TS 26.247 version 14.4.0 Release 14Annex A (informative): Example DASH Client Behaviour . 72g3A.1 Introduction 72g3A.2 Overview 72g3A.3 Segment List Generation 72g3A.4 Seeking . 72g3A.5 Support for Trick Modes 72g3A.6 Switching Representations . 72g3A.7 Reaction to
38、Error Codes . 72g3A.8 Encoder Clock Drift Control 72g3A.9 Handling Partial File Responses . 73g3A.10 Utilization of QoS Information 73g3A.11 Utilization of Quality Metadata 73g3Annex B (normative): Media Presentation Description Schema . 74g3B.1 Introduction 74g3B.2 Main Schema 74g3B.3 3GPP Extensio
39、n Schema 74g3Annex C (normative): Descriptor Scheme Definitions 76g3C.1 Introduction 76g3C.2 Void 76g3C.3 Void 76g3C.4 3D Video Disparity Range Descriptor Scheme 76g3C.5 3D Video Display Information Scheme . 77g3Annex D (informative): MPD Examples . 78g3D.1 On-Demand Service . 78g3D.2 Live Service 7
40、8g3D.3 MPD Assembly 80g3D.4 MPD Deltas 81g3Annex E (normative): Void . 85g3Annex F (normative): OMA DM QoE Management Object . 86g3Annex G (normative): File format extensions for 3GP DASH support . 92g3G.1 Introduction 92g3G.2 Void 92g3G.3 Void 92g3G.4 Void 92g3G.5 Void 92g3G.6 Void 92g3Annex H (nor
41、mative): MIME Type Registration for MPD 93g3ETSI ETSI TS 126 247 V14.4.0 (2018-01)73GPP TS 26.247 version 14.4.0 Release 14H.1 MPD MIME Type 93g3H.1.1 Introduction 93g3H.1.2 Void 93g3H.1.3 Void 93g3H.2 MPD Delta MIME Type. 93g3H.2.1 Introduction 93g3H.2.2 MIME Type and Subtype . 93g3Annex I (informa
42、tive): Signalling of DASH AVP values for QoS handling in the PCC . 95g3Annex J (normative): MIME Type Registration for QoE Reports . 97g3J.1 Introduction 97g3J.2 MIME Type and Subtype . 97g3Annex K (normative): ITU-T P.1203 Audio/Video MOS Estimation 99g3K.1 Introduction 99g3K.2 Calculation . 99g3An
43、nex L (normative): QoE Measurement Collection Functionalities . 102g3Annex M (informative): Change history . 104g3History 107g3ETSI ETSI TS 126 247 V14.4.0 (2018-01)83GPP TS 26.247 version 14.4.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Proje
44、ct (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in vers
45、ion number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, correcti
46、ons, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. The 3GPP transparent end-to-end packet-switched streaming service (PSS) specification consists of seven 3GPP TSs: 3GPP TS 22.233 1, 3GPP TS 26.233 2, 3GPP TS 26.234 3, 3GPP TS 26.2
47、44 4, 3GPP TS 26.245 5, 3GPP TS 26.246 6, and the present document. The TS 22.233 contains the service requirements for the PSS. The TS 26.233 provides an overview of the PSS. The TS 26.234 provides the details of the protocols and codecs used by the PSS. The TS 26.244 defines the 3GPP file format (
48、3GP) used by the PSS and MMS services. The TS 26.245 defines the Timed text format used by the PSS and MMS services. The TS 26.246 defines the 3GPP SMIL language profile. The present document defines Progressive Download and Dynamic Adaptive Streaming over HTTP. The TS 26.244, TS 26.245 and TS 26.24
49、6 start with Release 6. Earlier releases of the 3GPP file format, the Timed text format and the 3GPP SMIL language profile can be found in TS 26.234. The TS 26.247 starts with Release 10. Earlier releases of Progressive Download and Dynamic Adaptive Streaming over HTTP can be found in TS 26.234. Introduction Progressive Download and Dynamic Adaptive Streaming over HTTP (3GP-DASH) collects a set of technologies how progressive download and adaptive streaming of continuous media may be carried out exclusively over HTTP. ETSI ETSI TS 126 247 V14.4.0 (2018-01)93GPP
