1、 Recommendation ITU-R BS.1892(05/2011)Requirements for enhanced multimedia services for digital terrestrial broadcasting in VHF Bands I and IIBS SeriesBroadcasting service (sound)ii Rec. ITU-R BS.1892 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient
2、and economical 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 perf
3、ormed 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
4、to be 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 f
5、ound. 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, r
6、adiodetermination, 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 managemen
7、t SNG 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, 2011 ITU 2011 All rights reserved. No part of
8、this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BS.1892 1 RECOMMENDATION ITU-R BS.1892 Requirements for enhanced multimedia services for digital terrestrial broadcasting in VHF Bands I and II (Questions ITU-R 45-3/6, 56-1/6) (2011) Scope Thi
9、s Recommendation provides service and implementation requirements for enhanced multimedia services using digital terrestrial broadcasting to vehicular, portable and fixed receivers in the VHF broadcasting band. The ITU Radiocommunication Assembly, considering a) that there is an increasing requireme
10、nt worldwide for high-quality multichannel sound and multimedia broadcasting to vehicular, portable and fixed receivers; b) that narrowband radio-frequency channels in VHF Bands I and II can provide stable fixed and mobile reception under urban and rural conditions using vertical whip receiving ante
11、nnas; c) that extensive sound broadcasting services exist throughout the world in these frequency bands; d) that compatibility with existing frequency arrangements used for analogue broadcasting is a useful condition for transition to digital broadcasting for both users and broadcasters; e) that due
12、 to progress in source coding, channel coding and modulation the use of digital broadcasting systems can increase the quality and reliability of fixed and mobile reception, provide better power efficiency and enhanced coverage, increase quantity and quality of sound programmes and allow the introduc
13、tion of new services such as video and data transmission; f) that digital sound broadcasting will allow increased spectrum efficiency that could result in released spectrum to be used for other broadcasting purposes such as multimedia broadcasting; g) that basic features of multimedia and data appli
14、cations broadcasting systems for mobile reception by handheld receivers are described in Recommendation ITU-R BT.1833, recommends that digital terrestrial broadcasting systems with enhanced multimedia services in VHF Bands I and II, intended for vehicular, portable and fixed receivers, should have t
15、he following technical and operational characteristics and capabilities; they should: 1 comply with requirements of Recommendation ITU-R BS.774, describing service requirements for digital terrestrial sound broadcasting to vehicular, portable and fixed receivers in VHF/UHF bands; 2 provide high qual
16、ity multi-programme sound broadcasting including both stereo and multichannel sound; 3 provide multimedia data broadcasting (video with different resolutions, audio and additional data) that can be both related and unrelated to sound programmes; 2 Rec. ITU-R BS.1892 4 provide flexible configuration
17、of various services (high- or low-rate video, sound with different quality levels, supplementary data, etc.); 5 provide fast tuning and fast recovery from reception interruption under mobile conditions; 6 optionally use radio-frequency channels which are compatible with existing frequency channellin
18、g arrangements for analogue broadcasting; 7 provide optional support for single frequency networks; 8 minimize the level of interference to other radiocommunication services in specified and neighbouring frequency bands. NOTE 1 During the transition period from analogue to digital broadcasting, there may be a need for combined analogue/digital receiving capability to provide the user with both analogue and digital broadcasting services.
