1、 Recommendation ITU-R BT.1833-3(02/2014)Broadcasting of multimedia and data applications for mobile receptionby handheld receiversBT SeriesBroadcasting service(television)ii Rec. ITU-R BT.1833-3 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and ec
2、onomical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are performed
3、by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be
4、used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found.
5、Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, radiode
6、termination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum management SNG
7、Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2014 ITU 2014 All rights reserved. No part of this p
8、ublication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BT.1833-3 1 RECOMMENDATION ITU-R BT.1833-3*Broadcasting of multimedia and data applications for mobile reception by handheld receivers (Question ITU-R 45/6) (2007-2011-2012-2014) Scope This Recommend
9、ation provides an answer to the specific objectives of Question ITU-R 45/6 in order to guide administrations, as well as the broadcasting and radiocommunication industries, in the development of mobile broadcasting multimedia and data solutions. The scope of this Recommendation deals with the specia
10、l aspects of end user requirements for handheld receivers. The ITU Radiocommunication Assembly, considering a) that digital television and sound broadcasting systems have been implemented in many countries and will be introduced in many more in the coming years; b) that multimedia and data broadcast
11、ing services have been introduced, or are planned to be introduced, using the inherent capability of digital broadcasting systems; c) that mobile telecommunication systems with advanced information technologies are planned to be implemented in some countries, and will be implemented in other countri
12、es in the near future; d) that the characteristics of mobile reception are quite different from the fixed reception cases; e) that digital broadcasting services are expected to be offered in a variety of reception environments including those aimed at indoor, portable, handheld and vehicular receive
13、rs; f) that the display sizes and receiver capabilities of handheld, portable and vehicular receivers are different from those of fixed receivers; g) that a special case of mobile reception by handheld receivers requires specific technical characteristics; h) the need for interoperability between th
14、e mobile telecommunication services and interactive digital broadcasting services; j) the need for technical methods to ensure cyber security and conditional access solutions, noting a) that there are telecommunication systems not explicitly dedicated to broadcasting services, such as Multimedia Bro
15、adcast/Multicast Services (MBMS) that fulfil the requirements for interoperability between mobile telecommunication services and interactive digital broadcasting services; *This Recommendation should be brought to the attention of Radiocommunication Study Group 4. 2 Rec. ITU-R BT.1833-3 b) that ther
16、e are multimedia systems combining satellite component (dedicated or not explicitly dedicated to broadcasting) and dedicated terrestrial broadcasting components integrated within national frequency plans that fulfil the requirements for wide coverage with good quality of service, recommends 1 that a
17、dministrations wishing to implement broadcasting of multimedia and data applications for mobile reception by handheld receivers should consider the end user requirements as stated in Annex 1 for the evaluation and assessment of the respective system characteristics of multimedia systems; 2 that admi
18、nistrations wishing to implement broadcasting of multimedia and data applications for mobile reception by handheld receivers should use the technologies described in the referenced Recommendations in Annex 1 for designing multimedia broadcasting systems; 3 that Multimedia Systems listed in Annex 1 m
19、ay be applied for broadcasting of multimedia and data applications for mobile reception by handheld receivers. Annex 1 1 References This Recommendation gives big-picture information on multimedia broadcasting systems for mobile reception. It describes the user requirements of multimedia broadcasting
20、 systems for mobile reception and overviews of each system. There are three other Recommendations and one Report related with this Recommendation. The structure of a suite of Recommendations and Report is shown in Fig. 1. FIGURE 1 Structure of ITU-R Recommendations and Report dealing with multimedia
21、 broadcasting systems for mobile reception BT.1833-01Recommendation ITU-R BT.2055on multimedia applicationsRecommendation ITU-R BT.2054on multiplexing and transportRecommendation ITU-R BT.2016on channel coding and modulationRecommendation ITU-R BT.1833dealing withuser requirements andbrief descripti
22、ons ofthe multimedia systemsReport ITU-R BT.2049dealing with detailedimplementation ofthe multimedia systemsNOTE An arrow means reference. Recommendation ITU-R BT.2055 Content elements in multimedia broadcasting systems for mobile reception, deals with technologies for the application and presentati
23、on layers in multimedia broadcasting systems for mobile reception. It describes signal formats, source coding of audio, video, and other signals that constitute content. It also describes the technologies used for content navigation and interactivity. Rec. ITU-R BT.1833-3 3 Recommendation ITU-R BT.2
24、054 Multiplexing and transport schemes in multimedia broadcasting systems for mobile reception, deals with technologies for the multiplexing and transport layers in multimedia broadcasting systems for mobile reception. Recommendation ITU-R BT.2016 Error-correction, data framing, modulation and emiss
25、ion methods for terrestrial multimedia broadcasting for mobile reception using handheld receivers in VHF/UHF bands, gives information on the channel coding and modulation layers in multimedia broadcasting systems for mobile reception. Report ITU-R BT.2049 Broadcasting of multimedia and data applicat
26、ions for mobile reception, gives detailed information on the implementation of multimedia broadcasting systems for mobile reception. 2 Introduction The end user experience and the related applications for handheld reception are different from those already available, for portable and vehicular recep
27、tion. In addition, the physical limitations of handheld receivers imply specific system characteristics to meet the end user requirements. Therefore, the scope of this Recommendation on broadcast multimedia and data applications for mobile reception is in particular dealing with the special aspects
28、of the operation of handheld devices. 2.1 Handheld receivers Handheld receivers are battery operated devices which have significant physical limitations inherent in their dimensions (small antenna, screen sizes, etc.), screen resolution, computing power, battery capacity, etc. 2.2 Portable receivers
29、 Portable receivers are devices which are less power-constrained and therefore might offer higher computing power. As an example, this might result in the offering of higher picture resolution applications than possible with handheld receivers. 2.3 Vehicular receivers Vehicular receivers do not have
30、 the same physical and power-related limitations as handheld receivers have. However, the speed at which vehicular receivers may operate, on average, may be much higher. Vehicular receivers might be connected to vehicular mounted external antennas. 3 Abbreviations AT-DMB Advanced terrestrial digital
31、 multimedia broadcasting ATSC Advanced Television Systems Committee BCAST OMA mobile broadcast services DAB Digital audio broadcasting DVB-H Digital video broadcasting handheld DVB-SH Digital video broadcasting Satellite services to handheld devices DVB-T Digital video broadcasting terrestrial ETSI
32、European Telecommunications Standards Institute 4 Rec. ITU-R BT.1833-3 ETSI EN ETSI European Norm ETSI TS ETSI Technical Specification IP Internet Protocol IPDC Internet Protocol Data Cast ISDB-T Terrestrial integrated services digital broadcasting MBMS Multimedia broadcast/multicast services OMA Op
33、en mobile alliance QVGA Quarter video graphics array T-DAB Terrestrial digital audio broadcasting T-DMB Terrestrial-digital multimedia broadcasting 4 User requirements Some user requirements for mobile reception differ from those for fixed reception. For mobile reception of broadcast multimedia and
34、data by handheld receivers, specific requirements arise because of the differences in the usage of the receiving devices. The following requirements should be considered when implementing broadcast multimedia and data applications for mobile reception to handheld devices: delivery of high-quality mu
35、ltimedia content1including video, audio and/or data services; flexible configuration of a large variety of services (audio/video, ancillary and auxiliary data); access to content and services may be controlled via conditional access/service access protocols and other content protection mechanisms; s
36、eamless service access to content and services across networks; support for fast discovery and selection of content and services characterized for example, by channel acquisition time, service switching time2, scheduled content delivery mechanisms, etc.; support for efficient mechanisms to minimize
37、power consumption and physical size of the handheld receivers; support for stable and reliable service coverage for handheld receivers in various reception environments; support for interactivity, e.g. interactive content and applications, and/or interaction channel capabilities on handheld receiver
38、s, etc.; support for efficient and reliable delivery (transport) mechanisms of services; and technical aspects enabling interoperability of the services between broadcast and telecommunication networks, for example, content format, audio/video codecs, encapsulation methods, etc. 1The term “content”
39、in this Recommendation means programme material and related information of any variety. 2The service switching time is the time between the user selection of a new real-time streaming service and the initial display of this delivered service to the end user. Rec. ITU-R BT.1833-3 5 Table 1 lists syst
40、em characteristics of multimedia broadcasting systems for mobile reception in response to the user requirements above. In Table 1, the following systems are described: multimedia System “A” is based on Terrestrial Digital Multimedia Broadcasting (T-DMB, Recommendation ITU-R BS.1114 System A, ETSI TS
41、 102 427 and 102 428) and Advanced Terrestrial Digital Multimedia Broadcasting (AT-DMB, TTAK.KO-07.0070/R1, TTAK.KO-07.0071); multimedia System “B” is based on ATSC Mobile DTV Standard (A/153) that is an enhancement of the ATSC system (Recommendation ITU-R BT.1306 System A); multimedia System “C” is
42、 based on Integrated Services Digital Broadcasting-Terrestrial (ISDB-T one segment); multimedia System “E” is based on digital System E of Recommendation ITU-R BO.1130 for satellite component and Recommendation ITU-R BS.1547 for terrestrial component; multimedia System “F” is based on Integrated Ser
43、vices Digital Broadcasting-Terrestrial (ISDB-T) multimedia broadcasting for mobile reception; multimedia System “H” is based on Digital Video Broadcasting-Handheld (DVB-H, ETSI EN 302 304 and TR 102 377); multimedia System “I” is based on Digital Video Broadcasting Satellite to Handheld devices (DVB
44、-SH ETSI EN 302 583 and TS 102 584); multimedia System “T2” is based on Digital Video Broadcasting Terrestrial (DVB T2-Lite) profile (DVB-T2, ETSI EN 302 755 v.1.3.1). Detailed implementation and/or the service deployment of each system are described in Report ITU-R BT.2049. 6 Rec. ITU-R BT.1833-3 T
45、ABLE 1 System characteristics of multimedia broadcasting for mobile reception by handheld receivers System System characteristics description Multimedia System “A” This system, also known as terrestrial digital multimedia broadcasting (T-DMB) system, is an enhancement of T-DAB system to provide mult
46、imedia services including video, audio, and interactive data services for handheld receivers in a mobile environment. Multimedia System “A” uses T-DAB networks and is completely backward compatible with T-DAB system for audio services. AT-DMB system is an enhancement of T-DMB system to increase chan
47、nel capacity of T-DMB and is completely backward compatible with T-DMB system. Multimedia System “B” This system, also known as ATSC Mobile DTV, is an enhancement of the ATSC system to provide multimedia services including video, audio, and interactive data service delivery to small (power efficient
48、) receivers, for fixed, handheld and vehicular environments. Multimedia System “B” uses IP-based mechanism with control of time synchronized delivery via buffer modelling for an end-to-end broadcast system including enablement of a return path to facilitate delivery of any type of digital content an
49、d service. Multimedia System “C” The stream signal of this system can be multiplexed with the signal for the stationary reception that coexists within a single stream. And rich content format such as script programme support provides good interactivity on a small device. Multimedia System “E” Target receivers are typically handheld type with a 3.5 inch wide display for QVGA video and data broadcasting in addition to high quality audio. Satellite section covers nationwide and gap-fillers augment shadow areas from the satellite path. Suitab
