1、 ETSI TS 102 472 V1.3.1 (2009-06)Technical Specification Digital Video Broadcasting (DVB);IP Datacast over DVB-H:Content Delivery ProtocolsEuropean Broadcasting Union Union Europenne de Radio-Tlvision EBUUER ETSI ETSI TS 102 472 V1.3.1 (2009-06)2Reference RTS/JTC-DVB-251 Keywords broadcasting, digit
2、al, DVB-H, IP, multimedia, TV 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 lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies
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6、s authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2009. European Broadcasting Union 2009. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo a
7、re Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Par
8、tners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 472 V1.3.1 (2009-06)3Contents Intellectual Property Rights 6g3Foreword . 6g3Introduction 6g31 Scope 7g32 References 7g32.1 Normative references . 7g32.2 Informative references 8g33 Definitions a
9、nd abbreviations . 9g33.1 Definitions 9g33.2 Abbreviations . 10g34 Delivery platform . 11g34.1 Protocol stack . 12g35 Delivery protocol for real-time streaming services 12g35.1 RTP 12g35.2 Streaming session description with SDP 12g35.2.1 SDP Parameters for IPDC streaming sessions 13g35.2.1.1 Sender
10、IP address 13g35.2.1.2 Destination IP address and port number for channels . 13g35.2.1.3 Media description 13g35.2.1.4 Session timing parameters . 13g35.2.1.5 Service-language(s) per media 13g35.2.1.6 Bandwidth specification 14g35.2.1.7 Media Session Labelling . 14g35.2.2 SDP example for streaming s
11、ession 14g35.3 Hypothetical receiver buffering model . 15g35.3.1 Overview of the proposed buffering model (informative) 15g35.3.2 MultiProtocol Decapsulation buffer (normative) 15g35.3.3 RTP Decapsulation buffer (normative) . 16g35.3.4 Signalling of Hypothetical Receiver Buffer Model Parameters (nor
12、mative) 16g35.3.5 Conformance requirements (normative) . 16g35.4 Real-Time Streaming over Unicast 17g35.4.1 3GPP PSS . 17g36 Delivery protocol for file delivery services 17g36.1 FLUTE . 17g36.1.1 FLUTE as a file delivery mechanism . 18g36.1.2 Segmentation of files 18g36.1.3 Use of multiple FLUTE cha
13、nnels . 18g36.1.4 Symbol encoding algorithm 18g36.1.5 Blocking algorithm . 19g36.1.6 Congestion control 19g36.1.7 Content encoding of files for transport . 19g36.1.8 ALC packet size considerations 19g36.1.9 Signalling the end of file delivery and end of file delivery session 19g36.1.10 Files that sp
14、an over several separate file delivery sessions . 20g36.1.11 Grouping mechanisms for FLUTE file delivery . 20g36.1.12 File versioning 20g36.1.13 File delivery session description with SDP . 21g36.1.13.1 SDP parameters for IPDC file delivery session 21g36.1.13.1.1 Sender IP address 21g36.1.13.1.2 Num
15、ber of channels . 22g36.1.13.1.3 Destination IP address and port number for channels . 22g36.1.13.1.4 Transport Session Identifier (TSI) of the session 22g3ETSI ETSI TS 102 472 V1.3.1 (2009-06)46.1.13.1.5 Session timing parameters . 23g36.1.13.1.6 FEC capabilities and related parameters 23g36.1.13.1
16、.7 Service-language(s) per media 23g36.1.13.1.8 FLUTE Channel Labelling 23g36.1.13.2 Three timers 23g36.1.14 Signalling of parameters with FLUTE 24g36.1.14.1 Signalling of parameters with Basic ALC/FLUTE headers 24g36.1.14.2 Signalling of Parameters with FLUTE Extension Headers . 24g36.1.14.3 Signal
17、ling of parameters with FDT instances . 24g36.1.14.4 Signalling of parameters Out-band . 25g36.1.15 FDT schema 25g36.1.15.1 FDT Schema Extensions . 26g36.1.16 Caching Directives 27g36.2 Download and carousel mechanisms 27g36.2.1 Types of file delivery sessions 27g36.2.1.1 Static file delivery sessio
18、n . 28g36.2.1.1.1 Definition. 28g36.2.1.1.2 Implementation using FLUTE . 28g36.2.1.2 Fixed content delivery session 28g36.2.1.2.1 Definition. 28g36.2.1.2.2 Implementation using FLUTE . 28g36.2.1.3 Dynamic file delivery session . 29g36.2.1.3.1 Definition. 29g36.2.1.3.2 Implementation using FLUTE . 29
19、g36.2.1.4 Static file delivery carousel . 29g36.2.1.4.1 Definition. 29g36.2.1.4.2 Implementation using FLUTE . 29g36.2.1.5 Dynamic file delivery carousel . 29g36.2.1.5.1 Definition. 29g36.2.1.5.2 Implementation using FLUTE . 30g36.2.2 Session completeness 30g36.2.2.1 Session completeness for fixed c
20、ontent sessions. 30g36.2.2.2 Session completeness for static file delivery sessions and static file delivery carousels . 31g36.2.2.3 Session completeness for dynamic file delivery sessions and dynamic file delivery carousels 31g36.3 Delivery Protocols over Unicast . 32g36.3.1 File Delivery using HTT
21、P . 32g36.3.2 File Delivery using FLUTE over Unicast . 33g36.3.3 File Delivery using Notifications 33g37 Associated delivery procedures 33g37.1 Introduction 33g37.2 Signalling of associated delivery procedures . 33g37.3 File repair mechanisms . 34g37.3.1 General procedure . 34g37.3.2 Triggering asso
22、ciated delivery procedures for file delivery sessions 35g37.3.3 Identification of repair needs 35g37.3.4 Distribution of repair requests over time 35g37.3.4.1 Reset of the back-off timer 35g37.3.5 Distribution of repair requests over repair servers 35g37.3.6 File repair request message . 36g37.3.6.1
23、 File repair request message format 36g37.3.7 Repair server behaviour 38g37.3.7.1 File repair response message . 38g37.3.7.2 File repair response messages codes . 39g37.3.7.3 Repair server response message format for HTTP carriage of repair data 40g37.3.8 File repair response for broadcast/multicast
24、 of repair data . 41g37.3.9 Threshold-dependent repair strategy . 42g37.3.10 Server Not Responding Error Case . 42g37.4 Reception reporting procedure . 43g37.4.1 Identifying complete file reception from file delivery 43g37.4.2 Identifying complete delivery session reception . 43g37.4.3 Determining w
25、hether a reception report is required . 44g3ETSI ETSI TS 102 472 V1.3.1 (2009-06)57.4.4 Request time selection 44g37.4.5 Reception report server selection 45g37.4.6 Reception report message . 45g37.4.7 Reception report response message 46g37.5 XML-schema for associated delivery procedures 46g37.5.1
26、Generic associated delivery procedure description . 46g37.5.2 Example associatedProcedureDescription instance 47g37.5.3 XML Syntax for a reception report request 47g37.5.4 Example XML for the Reception Report Request 48g38 Application layer FEC 48g38.1 FEC Scheme definition 48g38.1.1 General 48g39 S
27、ubtitling 48g39.1 Subtitling using 3GPP Timed Text Format 49g39.1.1 Unicode Support . 49g39.1.2 Support for Transparency . 49g39.1.3 Text position and scaling 49g39.1.4 Optional features . 49g39.1.5 Delivery of subtitling text . 50g39.1.6 SDP Parameters for IPDC streaming sessions 50g39.2 Bitmap bas
28、ed subtitling 51g39.2.1 Pixel addressing and scaling of bitmap based subtitles. 52g39.2.2 Pixel addressing of non “720 by 576“ subtitles 53g39.2.3 Carriage of DVB subtitle streams over RTP . 53g39.2.4 Use of SDP to signal DVB subtitles . 54g310 Description of SPP Streams using SDP . 54g310.1 Key Str
29、eam Message (KSM) Stream 54g310.2 Key Management Message (KMM) stream . 55g310.3 KSM Stream Binding . 55g3Annex A (informative): Overview of the blocking algorithm for FEC encoding id 0 57g3Annex B (informative): Algorithm to select repair mechanism for file delivery service . 58g3Annex C (normative
30、): Void . 60g3Annex D (informative): Process to handle encrypted services in SPP systems . 61g3D.1 SDP examples for key streams . 61g3D.2 Examples for referencing key stream messages in SDP media descriptions 61g3Annex E (informative): Example FEC decoder . 63g3History 64g3ETSI ETSI TS 102 472 V1.3.
31、1 (2009-06)6Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellect
32、ual 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 on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigat
33、ion, 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 may be, or may become, essential to the present document. Foreword This Technical Specificati
34、on (TS) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). Founded in September 1993, the DVB Project is a market-led consor
35、tium of public and private sector organizations in the television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital television services. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters market-led systems, whic
36、h meet the real needs, and economic circumstances, of the consumer electronics and the broadcast industry. NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a
37、 tripartite body by including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio and television receivers. The EBU is a professional association of broadcasting organizations whose work includes the co-ordination of its members activities in the te
38、chnical, legal, programme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 Intr
39、oduction IP Datacast over DVB-H is an end-to-end broadcast system for delivery of any types of digital content and services using IP-based mechanisms optimized for devices with limitations on computational resources and battery. An inherent part of the IPDC system is that it comprises a unidirection
40、al DVB broadcast path that may be combined with a bi-directional mobile/cellular interactivity path. IPDC is thus a platform that can be used for enabling the convergence of services from broadcast/media and telecommunications domains (e.g. mobile/cellular). Harmonization of the IP Datacast over DVB
41、-H content delivery protocols with 3GPP MBMS 1 has been one of the natural goals of the work. ETSI ETSI TS 102 472 V1.3.1 (2009-06)71 Scope The present document defines a set of Content Delivery Protocols for streaming and file delivery services to be used with IP Datacast over DVB-H i.1. Delivery p
42、rotocols will be IP-based and will be implemented both in content servers and IP Datacast terminals. The present document includes information applicable to broadcasters, network operators, service providers and manufacturers. 2 References References are either specific (identified by date of public
43、ation and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all futur
44、e changes of the referenced document for the purposes of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this cla
45、use were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the
46、latest edition of the referenced document (including any amendments) applies. 1 ETSI TS 126 346: “Universal Mobile Telecommunications System (UMTS); Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs (3GPP TS 26.346 version 8.1.0 Release 8)“. 2 IETF RFC 3926: “FLUTE - File Delivery
47、over Unidirectional Transport“. 3 IETF RFC 3550: “RTP: A Transport Protocol for Real-Time Applications“. 4 IETF RFC 4566: “SDP: Session Description Protocol“. 5 IETF RFC 3890: “A Transport Independent Bandwidth Modifier for the Session Description Protocol (SDP)“. 6 IETF RFC 3556: “Session Descripti
48、on Protocol (SDP) Bandwidth Modifiers for RTP Control Protocol (RTCP) Bandwidth“. 7 ETSI EN 301 192: “Digital Video Broadcasting (DVB); DVB specification for data broadcasting“. 8 IETF RFC 3450: “Asynchronous Layered Coding (ALC) Protocol Instantiation“. 9 IETF RFC 3451: “Layered Coding Transport (L
49、CT) Building Block“. 10 IETF RFC 5052: “Forward Error Correction (FEC) Building Block“. 11 IETF RFC 1952: “GZIP file format specification version 4.3“. ETSI ETSI TS 102 472 V1.3.1 (2009-06)812 IETF RFC 4646: “Tags for the identification of languages“. 13 IETF RFC 3695: “Compact Forward Error Correction (FEC) Schemes“. 14 IETF RFC 2616: “Hypertext Transfer Protocol - HTTP/1.1“. 15 ETSI TS 126 245 (V6.1.0): “Universal Mobile Telecommunications System (UMTS); Transparent end-to-end Packet switched Streaming Service (PS); Timed text
